[279] | 1 | /*
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| 2 | * ARMv4 code generator for TCC
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[331] | 3 | *
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| 4 | * Copyright (c) 2003 Daniel Glöckner
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[279] | 5 | * Copyright (c) 2012 Thomas Preud'homme
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| 6 | *
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| 7 | * Based on i386-gen.c by Fabrice Bellard
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| 8 | *
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| 9 | * This library is free software; you can redistribute it and/or
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| 10 | * modify it under the terms of the GNU Lesser General Public
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| 11 | * License as published by the Free Software Foundation; either
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| 12 | * version 2 of the License, or (at your option) any later version.
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| 13 | *
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| 14 | * This library is distributed in the hope that it will be useful,
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 17 | * Lesser General Public License for more details.
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| 18 | *
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| 19 | * You should have received a copy of the GNU Lesser General Public
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| 20 | * License along with this library; if not, write to the Free Software
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| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 22 | */
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| 23 |
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| 24 | #ifdef TARGET_DEFS_ONLY
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| 25 |
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[331] | 26 | #if defined(TCC_ARM_EABI) && !defined(TCC_ARM_VFP)
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| 27 | #error "Currently TinyCC only supports float computation with VFP instructions"
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[279] | 28 | #endif
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| 29 |
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| 30 | /* number of available registers */
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| 31 | #ifdef TCC_ARM_VFP
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| 32 | #define NB_REGS 13
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| 33 | #else
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| 34 | #define NB_REGS 9
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| 35 | #endif
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| 36 |
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[331] | 37 | #ifndef TCC_CPU_VERSION
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| 38 | # define TCC_CPU_VERSION 5
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[279] | 39 | #endif
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| 40 |
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| 41 | /* a register can belong to several classes. The classes must be
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| 42 | sorted from more general to more precise (see gv2() code which does
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| 43 | assumptions on it). */
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| 44 | #define RC_INT 0x0001 /* generic integer register */
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| 45 | #define RC_FLOAT 0x0002 /* generic float register */
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| 46 | #define RC_R0 0x0004
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[331] | 47 | #define RC_R1 0x0008
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[279] | 48 | #define RC_R2 0x0010
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| 49 | #define RC_R3 0x0020
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| 50 | #define RC_R12 0x0040
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| 51 | #define RC_F0 0x0080
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| 52 | #define RC_F1 0x0100
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| 53 | #define RC_F2 0x0200
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| 54 | #define RC_F3 0x0400
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| 55 | #ifdef TCC_ARM_VFP
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| 56 | #define RC_F4 0x0800
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| 57 | #define RC_F5 0x1000
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| 58 | #define RC_F6 0x2000
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| 59 | #define RC_F7 0x4000
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| 60 | #endif
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| 61 | #define RC_IRET RC_R0 /* function return: integer register */
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| 62 | #define RC_LRET RC_R1 /* function return: second integer register */
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| 63 | #define RC_FRET RC_F0 /* function return: float register */
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| 64 |
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| 65 | /* pretty names for the registers */
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| 66 | enum {
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| 67 | TREG_R0 = 0,
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| 68 | TREG_R1,
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| 69 | TREG_R2,
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| 70 | TREG_R3,
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| 71 | TREG_R12,
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| 72 | TREG_F0,
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| 73 | TREG_F1,
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| 74 | TREG_F2,
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| 75 | TREG_F3,
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| 76 | #ifdef TCC_ARM_VFP
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| 77 | TREG_F4,
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| 78 | TREG_F5,
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| 79 | TREG_F6,
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| 80 | TREG_F7,
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| 81 | #endif
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[331] | 82 | TREG_SP = 13,
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| 83 | TREG_LR,
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[279] | 84 | };
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| 85 |
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| 86 | #ifdef TCC_ARM_VFP
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| 87 | #define T2CPR(t) (((t) & VT_BTYPE) != VT_FLOAT ? 0x100 : 0)
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| 88 | #endif
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| 89 |
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| 90 | /* return registers for function */
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| 91 | #define REG_IRET TREG_R0 /* single word int return register */
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| 92 | #define REG_LRET TREG_R1 /* second word return register (for long long) */
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| 93 | #define REG_FRET TREG_F0 /* float return register */
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| 94 |
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| 95 | #ifdef TCC_ARM_EABI
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| 96 | #define TOK___divdi3 TOK___aeabi_ldivmod
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| 97 | #define TOK___moddi3 TOK___aeabi_ldivmod
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| 98 | #define TOK___udivdi3 TOK___aeabi_uldivmod
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| 99 | #define TOK___umoddi3 TOK___aeabi_uldivmod
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| 100 | #endif
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| 101 |
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| 102 | /* defined if function parameters must be evaluated in reverse order */
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| 103 | #define INVERT_FUNC_PARAMS
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| 104 |
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| 105 | /* defined if structures are passed as pointers. Otherwise structures
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| 106 | are directly pushed on stack. */
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[331] | 107 | /* #define FUNC_STRUCT_PARAM_AS_PTR */
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[279] | 108 |
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| 109 | /* pointer size, in bytes */
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| 110 | #define PTR_SIZE 4
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| 111 |
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| 112 | /* long double size and alignment, in bytes */
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| 113 | #ifdef TCC_ARM_VFP
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| 114 | #define LDOUBLE_SIZE 8
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| 115 | #endif
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| 116 |
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| 117 | #ifndef LDOUBLE_SIZE
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| 118 | #define LDOUBLE_SIZE 8
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| 119 | #endif
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| 120 |
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| 121 | #ifdef TCC_ARM_EABI
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| 122 | #define LDOUBLE_ALIGN 8
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| 123 | #else
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| 124 | #define LDOUBLE_ALIGN 4
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| 125 | #endif
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| 126 |
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| 127 | /* maximum alignment (for aligned attribute support) */
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| 128 | #define MAX_ALIGN 8
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| 129 |
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| 130 | #define CHAR_IS_UNSIGNED
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| 131 |
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| 132 | /******************************************************/
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| 133 | #else /* ! TARGET_DEFS_ONLY */
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| 134 | /******************************************************/
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| 135 | #include "tcc.h"
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| 136 |
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[331] | 137 | enum float_abi float_abi;
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| 138 |
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[279] | 139 | ST_DATA const int reg_classes[NB_REGS] = {
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| 140 | /* r0 */ RC_INT | RC_R0,
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| 141 | /* r1 */ RC_INT | RC_R1,
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| 142 | /* r2 */ RC_INT | RC_R2,
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| 143 | /* r3 */ RC_INT | RC_R3,
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| 144 | /* r12 */ RC_INT | RC_R12,
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| 145 | /* f0 */ RC_FLOAT | RC_F0,
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| 146 | /* f1 */ RC_FLOAT | RC_F1,
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| 147 | /* f2 */ RC_FLOAT | RC_F2,
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| 148 | /* f3 */ RC_FLOAT | RC_F3,
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| 149 | #ifdef TCC_ARM_VFP
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| 150 | /* d4/s8 */ RC_FLOAT | RC_F4,
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| 151 | /* d5/s10 */ RC_FLOAT | RC_F5,
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| 152 | /* d6/s12 */ RC_FLOAT | RC_F6,
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| 153 | /* d7/s14 */ RC_FLOAT | RC_F7,
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| 154 | #endif
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| 155 | };
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| 156 |
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| 157 | static int func_sub_sp_offset, last_itod_magic;
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| 158 | static int leaffunc;
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| 159 |
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| 160 | #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
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| 161 | static CType float_type, double_type, func_float_type, func_double_type;
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[331] | 162 | ST_FUNC void arm_init(struct TCCState *s)
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[279] | 163 | {
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| 164 | float_type.t = VT_FLOAT;
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| 165 | double_type.t = VT_DOUBLE;
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| 166 | func_float_type.t = VT_FUNC;
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| 167 | func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
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| 168 | func_double_type.t = VT_FUNC;
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| 169 | func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
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[331] | 170 |
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| 171 | float_abi = s->float_abi;
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| 172 | #ifndef TCC_ARM_HARDFLOAT
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| 173 | tcc_warning("soft float ABI currently not supported: default to softfp");
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| 174 | #endif
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[279] | 175 | }
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| 176 | #else
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| 177 | #define func_float_type func_old_type
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| 178 | #define func_double_type func_old_type
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| 179 | #define func_ldouble_type func_old_type
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[331] | 180 | ST_FUNC void arm_init(struct TCCState *s)
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| 181 | {
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| 182 | #if 0
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| 183 | #if !defined (TCC_ARM_VFP)
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| 184 | tcc_warning("Support for FPA is deprecated and will be removed in next"
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| 185 | " release");
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[279] | 186 | #endif
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[331] | 187 | #if !defined (TCC_ARM_EABI)
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| 188 | tcc_warning("Support for OABI is deprecated and will be removed in next"
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| 189 | " release");
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| 190 | #endif
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| 191 | #endif
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| 192 | }
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| 193 | #endif
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[279] | 194 |
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| 195 | static int two2mask(int a,int b) {
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| 196 | return (reg_classes[a]|reg_classes[b])&~(RC_INT|RC_FLOAT);
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| 197 | }
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| 198 |
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| 199 | static int regmask(int r) {
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| 200 | return reg_classes[r]&~(RC_INT|RC_FLOAT);
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| 201 | }
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| 202 |
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| 203 | /******************************************************/
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| 204 |
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[331] | 205 | #if defined(TCC_ARM_EABI) && !defined(CONFIG_TCC_ELFINTERP)
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| 206 | const char *default_elfinterp(struct TCCState *s)
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[279] | 207 | {
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[331] | 208 | if (s->float_abi == ARM_HARD_FLOAT)
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| 209 | return "/lib/ld-linux-armhf.so.3";
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| 210 | else
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| 211 | return "/lib/ld-linux.so.3";
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| 212 | }
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| 213 | #endif
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| 214 |
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| 215 | void o(uint32_t i)
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| 216 | {
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[279] | 217 | /* this is a good place to start adding big-endian support*/
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| 218 | int ind1;
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[331] | 219 | if (nocode_wanted)
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| 220 | return;
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[279] | 221 | ind1 = ind + 4;
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| 222 | if (!cur_text_section)
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| 223 | tcc_error("compiler error! This happens f.ex. if the compiler\n"
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| 224 | "can't evaluate constant expressions outside of a function.");
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| 225 | if (ind1 > cur_text_section->data_allocated)
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| 226 | section_realloc(cur_text_section, ind1);
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| 227 | cur_text_section->data[ind++] = i&255;
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| 228 | i>>=8;
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| 229 | cur_text_section->data[ind++] = i&255;
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[331] | 230 | i>>=8;
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[279] | 231 | cur_text_section->data[ind++] = i&255;
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| 232 | i>>=8;
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| 233 | cur_text_section->data[ind++] = i;
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| 234 | }
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| 235 |
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| 236 | static uint32_t stuff_const(uint32_t op, uint32_t c)
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| 237 | {
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| 238 | int try_neg=0;
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| 239 | uint32_t nc = 0, negop = 0;
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| 240 |
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| 241 | switch(op&0x1F00000)
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| 242 | {
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| 243 | case 0x800000: //add
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| 244 | case 0x400000: //sub
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| 245 | try_neg=1;
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| 246 | negop=op^0xC00000;
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| 247 | nc=-c;
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| 248 | break;
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| 249 | case 0x1A00000: //mov
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| 250 | case 0x1E00000: //mvn
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| 251 | try_neg=1;
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| 252 | negop=op^0x400000;
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| 253 | nc=~c;
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| 254 | break;
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| 255 | case 0x200000: //xor
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| 256 | if(c==~0)
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| 257 | return (op&0xF010F000)|((op>>16)&0xF)|0x1E00000;
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| 258 | break;
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| 259 | case 0x0: //and
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| 260 | if(c==~0)
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| 261 | return (op&0xF010F000)|((op>>16)&0xF)|0x1A00000;
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| 262 | case 0x1C00000: //bic
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| 263 | try_neg=1;
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| 264 | negop=op^0x1C00000;
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| 265 | nc=~c;
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| 266 | break;
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| 267 | case 0x1800000: //orr
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| 268 | if(c==~0)
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| 269 | return (op&0xFFF0FFFF)|0x1E00000;
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| 270 | break;
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| 271 | }
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| 272 | do {
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| 273 | uint32_t m;
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| 274 | int i;
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| 275 | if(c<256) /* catch undefined <<32 */
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| 276 | return op|c;
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| 277 | for(i=2;i<32;i+=2) {
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| 278 | m=(0xff>>i)|(0xff<<(32-i));
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| 279 | if(!(c&~m))
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| 280 | return op|(i<<7)|(c<<i)|(c>>(32-i));
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| 281 | }
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| 282 | op=negop;
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| 283 | c=nc;
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| 284 | } while(try_neg--);
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| 285 | return 0;
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| 286 | }
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| 287 |
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| 288 |
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| 289 | //only add,sub
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| 290 | void stuff_const_harder(uint32_t op, uint32_t v) {
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| 291 | uint32_t x;
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| 292 | x=stuff_const(op,v);
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| 293 | if(x)
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| 294 | o(x);
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| 295 | else {
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| 296 | uint32_t a[16], nv, no, o2, n2;
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| 297 | int i,j,k;
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| 298 | a[0]=0xff;
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| 299 | o2=(op&0xfff0ffff)|((op&0xf000)<<4);;
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| 300 | for(i=1;i<16;i++)
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| 301 | a[i]=(a[i-1]>>2)|(a[i-1]<<30);
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| 302 | for(i=0;i<12;i++)
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| 303 | for(j=i<4?i+12:15;j>=i+4;j--)
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| 304 | if((v&(a[i]|a[j]))==v) {
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| 305 | o(stuff_const(op,v&a[i]));
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| 306 | o(stuff_const(o2,v&a[j]));
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| 307 | return;
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| 308 | }
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| 309 | no=op^0xC00000;
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| 310 | n2=o2^0xC00000;
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| 311 | nv=-v;
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| 312 | for(i=0;i<12;i++)
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| 313 | for(j=i<4?i+12:15;j>=i+4;j--)
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| 314 | if((nv&(a[i]|a[j]))==nv) {
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| 315 | o(stuff_const(no,nv&a[i]));
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| 316 | o(stuff_const(n2,nv&a[j]));
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| 317 | return;
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| 318 | }
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| 319 | for(i=0;i<8;i++)
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| 320 | for(j=i+4;j<12;j++)
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| 321 | for(k=i<4?i+12:15;k>=j+4;k--)
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| 322 | if((v&(a[i]|a[j]|a[k]))==v) {
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| 323 | o(stuff_const(op,v&a[i]));
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| 324 | o(stuff_const(o2,v&a[j]));
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| 325 | o(stuff_const(o2,v&a[k]));
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| 326 | return;
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| 327 | }
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| 328 | no=op^0xC00000;
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| 329 | nv=-v;
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| 330 | for(i=0;i<8;i++)
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| 331 | for(j=i+4;j<12;j++)
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| 332 | for(k=i<4?i+12:15;k>=j+4;k--)
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| 333 | if((nv&(a[i]|a[j]|a[k]))==nv) {
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| 334 | o(stuff_const(no,nv&a[i]));
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| 335 | o(stuff_const(n2,nv&a[j]));
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| 336 | o(stuff_const(n2,nv&a[k]));
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| 337 | return;
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| 338 | }
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| 339 | o(stuff_const(op,v&a[0]));
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| 340 | o(stuff_const(o2,v&a[4]));
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| 341 | o(stuff_const(o2,v&a[8]));
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| 342 | o(stuff_const(o2,v&a[12]));
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| 343 | }
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| 344 | }
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| 345 |
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[331] | 346 | uint32_t encbranch(int pos, int addr, int fail)
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[279] | 347 | {
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| 348 | addr-=pos+8;
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| 349 | addr/=4;
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| 350 | if(addr>=0x1000000 || addr<-0x1000000) {
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| 351 | if(fail)
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| 352 | tcc_error("FIXME: function bigger than 32MB");
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| 353 | return 0;
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| 354 | }
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| 355 | return 0x0A000000|(addr&0xffffff);
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| 356 | }
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| 357 |
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| 358 | int decbranch(int pos)
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| 359 | {
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| 360 | int x;
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| 361 | x=*(uint32_t *)(cur_text_section->data + pos);
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| 362 | x&=0x00ffffff;
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| 363 | if(x&0x800000)
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| 364 | x-=0x1000000;
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| 365 | return x*4+pos+8;
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| 366 | }
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| 367 |
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| 368 | /* output a symbol and patch all calls to it */
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| 369 | void gsym_addr(int t, int a)
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| 370 | {
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| 371 | uint32_t *x;
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| 372 | int lt;
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| 373 | while(t) {
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| 374 | x=(uint32_t *)(cur_text_section->data + t);
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| 375 | t=decbranch(lt=t);
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| 376 | if(a==lt+4)
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| 377 | *x=0xE1A00000; // nop
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| 378 | else {
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| 379 | *x &= 0xff000000;
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| 380 | *x |= encbranch(lt,a,1);
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| 381 | }
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| 382 | }
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| 383 | }
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| 384 |
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| 385 | void gsym(int t)
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| 386 | {
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| 387 | gsym_addr(t, ind);
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| 388 | }
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| 389 |
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| 390 | #ifdef TCC_ARM_VFP
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| 391 | static uint32_t vfpr(int r)
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| 392 | {
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| 393 | if(r<TREG_F0 || r>TREG_F7)
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| 394 | tcc_error("compiler error! register %i is no vfp register",r);
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[331] | 395 | return r - TREG_F0;
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[279] | 396 | }
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| 397 | #else
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| 398 | static uint32_t fpr(int r)
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| 399 | {
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| 400 | if(r<TREG_F0 || r>TREG_F3)
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| 401 | tcc_error("compiler error! register %i is no fpa register",r);
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[331] | 402 | return r - TREG_F0;
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[279] | 403 | }
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| 404 | #endif
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| 405 |
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| 406 | static uint32_t intr(int r)
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| 407 | {
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[331] | 408 | if(r == TREG_R12)
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[279] | 409 | return 12;
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[331] | 410 | if(r >= TREG_R0 && r <= TREG_R3)
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| 411 | return r - TREG_R0;
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| 412 | if (r >= TREG_SP && r <= TREG_LR)
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| 413 | return r + (13 - TREG_SP);
|
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| 414 | tcc_error("compiler error! register %i is no int register",r);
|
---|
[279] | 415 | }
|
---|
| 416 |
|
---|
| 417 | static void calcaddr(uint32_t *base, int *off, int *sgn, int maxoff, unsigned shift)
|
---|
| 418 | {
|
---|
| 419 | if(*off>maxoff || *off&((1<<shift)-1)) {
|
---|
| 420 | uint32_t x, y;
|
---|
| 421 | x=0xE280E000;
|
---|
| 422 | if(*sgn)
|
---|
| 423 | x=0xE240E000;
|
---|
| 424 | x|=(*base)<<16;
|
---|
| 425 | *base=14; // lr
|
---|
| 426 | y=stuff_const(x,*off&~maxoff);
|
---|
| 427 | if(y) {
|
---|
| 428 | o(y);
|
---|
| 429 | *off&=maxoff;
|
---|
| 430 | return;
|
---|
| 431 | }
|
---|
| 432 | y=stuff_const(x,(*off+maxoff)&~maxoff);
|
---|
| 433 | if(y) {
|
---|
| 434 | o(y);
|
---|
| 435 | *sgn=!*sgn;
|
---|
| 436 | *off=((*off+maxoff)&~maxoff)-*off;
|
---|
| 437 | return;
|
---|
| 438 | }
|
---|
| 439 | stuff_const_harder(x,*off&~maxoff);
|
---|
| 440 | *off&=maxoff;
|
---|
| 441 | }
|
---|
| 442 | }
|
---|
| 443 |
|
---|
| 444 | static uint32_t mapcc(int cc)
|
---|
| 445 | {
|
---|
| 446 | switch(cc)
|
---|
| 447 | {
|
---|
| 448 | case TOK_ULT:
|
---|
| 449 | return 0x30000000; /* CC/LO */
|
---|
| 450 | case TOK_UGE:
|
---|
| 451 | return 0x20000000; /* CS/HS */
|
---|
| 452 | case TOK_EQ:
|
---|
| 453 | return 0x00000000; /* EQ */
|
---|
| 454 | case TOK_NE:
|
---|
| 455 | return 0x10000000; /* NE */
|
---|
| 456 | case TOK_ULE:
|
---|
| 457 | return 0x90000000; /* LS */
|
---|
| 458 | case TOK_UGT:
|
---|
| 459 | return 0x80000000; /* HI */
|
---|
| 460 | case TOK_Nset:
|
---|
| 461 | return 0x40000000; /* MI */
|
---|
| 462 | case TOK_Nclear:
|
---|
| 463 | return 0x50000000; /* PL */
|
---|
| 464 | case TOK_LT:
|
---|
| 465 | return 0xB0000000; /* LT */
|
---|
| 466 | case TOK_GE:
|
---|
| 467 | return 0xA0000000; /* GE */
|
---|
| 468 | case TOK_LE:
|
---|
| 469 | return 0xD0000000; /* LE */
|
---|
| 470 | case TOK_GT:
|
---|
| 471 | return 0xC0000000; /* GT */
|
---|
| 472 | }
|
---|
| 473 | tcc_error("unexpected condition code");
|
---|
| 474 | return 0xE0000000; /* AL */
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | static int negcc(int cc)
|
---|
| 478 | {
|
---|
| 479 | switch(cc)
|
---|
| 480 | {
|
---|
| 481 | case TOK_ULT:
|
---|
| 482 | return TOK_UGE;
|
---|
| 483 | case TOK_UGE:
|
---|
| 484 | return TOK_ULT;
|
---|
| 485 | case TOK_EQ:
|
---|
| 486 | return TOK_NE;
|
---|
| 487 | case TOK_NE:
|
---|
| 488 | return TOK_EQ;
|
---|
| 489 | case TOK_ULE:
|
---|
| 490 | return TOK_UGT;
|
---|
| 491 | case TOK_UGT:
|
---|
| 492 | return TOK_ULE;
|
---|
| 493 | case TOK_Nset:
|
---|
| 494 | return TOK_Nclear;
|
---|
| 495 | case TOK_Nclear:
|
---|
| 496 | return TOK_Nset;
|
---|
| 497 | case TOK_LT:
|
---|
| 498 | return TOK_GE;
|
---|
| 499 | case TOK_GE:
|
---|
| 500 | return TOK_LT;
|
---|
| 501 | case TOK_LE:
|
---|
| 502 | return TOK_GT;
|
---|
| 503 | case TOK_GT:
|
---|
| 504 | return TOK_LE;
|
---|
| 505 | }
|
---|
| 506 | tcc_error("unexpected condition code");
|
---|
| 507 | return TOK_NE;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | /* load 'r' from value 'sv' */
|
---|
| 511 | void load(int r, SValue *sv)
|
---|
| 512 | {
|
---|
| 513 | int v, ft, fc, fr, sign;
|
---|
| 514 | uint32_t op;
|
---|
| 515 | SValue v1;
|
---|
| 516 |
|
---|
| 517 | fr = sv->r;
|
---|
| 518 | ft = sv->type.t;
|
---|
[331] | 519 | fc = sv->c.i;
|
---|
[279] | 520 |
|
---|
| 521 | if(fc>=0)
|
---|
| 522 | sign=0;
|
---|
| 523 | else {
|
---|
| 524 | sign=1;
|
---|
| 525 | fc=-fc;
|
---|
| 526 | }
|
---|
[331] | 527 |
|
---|
[279] | 528 | v = fr & VT_VALMASK;
|
---|
| 529 | if (fr & VT_LVAL) {
|
---|
| 530 | uint32_t base = 0xB; // fp
|
---|
| 531 | if(v == VT_LLOCAL) {
|
---|
| 532 | v1.type.t = VT_PTR;
|
---|
| 533 | v1.r = VT_LOCAL | VT_LVAL;
|
---|
[331] | 534 | v1.c.i = sv->c.i;
|
---|
| 535 | load(TREG_LR, &v1);
|
---|
| 536 | base = 14; /* lr */
|
---|
[279] | 537 | fc=sign=0;
|
---|
| 538 | v=VT_LOCAL;
|
---|
| 539 | } else if(v == VT_CONST) {
|
---|
| 540 | v1.type.t = VT_PTR;
|
---|
| 541 | v1.r = fr&~VT_LVAL;
|
---|
[331] | 542 | v1.c.i = sv->c.i;
|
---|
[279] | 543 | v1.sym=sv->sym;
|
---|
[331] | 544 | load(TREG_LR, &v1);
|
---|
| 545 | base = 14; /* lr */
|
---|
[279] | 546 | fc=sign=0;
|
---|
| 547 | v=VT_LOCAL;
|
---|
| 548 | } else if(v < VT_CONST) {
|
---|
| 549 | base=intr(v);
|
---|
| 550 | fc=sign=0;
|
---|
| 551 | v=VT_LOCAL;
|
---|
| 552 | }
|
---|
| 553 | if(v == VT_LOCAL) {
|
---|
| 554 | if(is_float(ft)) {
|
---|
| 555 | calcaddr(&base,&fc,&sign,1020,2);
|
---|
| 556 | #ifdef TCC_ARM_VFP
|
---|
| 557 | op=0xED100A00; /* flds */
|
---|
| 558 | if(!sign)
|
---|
| 559 | op|=0x800000;
|
---|
| 560 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
| 561 | op|=0x100; /* flds -> fldd */
|
---|
| 562 | o(op|(vfpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
| 563 | #else
|
---|
| 564 | op=0xED100100;
|
---|
| 565 | if(!sign)
|
---|
| 566 | op|=0x800000;
|
---|
| 567 | #if LDOUBLE_SIZE == 8
|
---|
| 568 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
| 569 | op|=0x8000;
|
---|
| 570 | #else
|
---|
| 571 | if ((ft & VT_BTYPE) == VT_DOUBLE)
|
---|
| 572 | op|=0x8000;
|
---|
| 573 | else if ((ft & VT_BTYPE) == VT_LDOUBLE)
|
---|
| 574 | op|=0x400000;
|
---|
| 575 | #endif
|
---|
| 576 | o(op|(fpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
| 577 | #endif
|
---|
| 578 | } else if((ft & (VT_BTYPE|VT_UNSIGNED)) == VT_BYTE
|
---|
| 579 | || (ft & VT_BTYPE) == VT_SHORT) {
|
---|
| 580 | calcaddr(&base,&fc,&sign,255,0);
|
---|
| 581 | op=0xE1500090;
|
---|
| 582 | if ((ft & VT_BTYPE) == VT_SHORT)
|
---|
| 583 | op|=0x20;
|
---|
| 584 | if ((ft & VT_UNSIGNED) == 0)
|
---|
| 585 | op|=0x40;
|
---|
| 586 | if(!sign)
|
---|
| 587 | op|=0x800000;
|
---|
| 588 | o(op|(intr(r)<<12)|(base<<16)|((fc&0xf0)<<4)|(fc&0xf));
|
---|
| 589 | } else {
|
---|
| 590 | calcaddr(&base,&fc,&sign,4095,0);
|
---|
| 591 | op=0xE5100000;
|
---|
| 592 | if(!sign)
|
---|
| 593 | op|=0x800000;
|
---|
[331] | 594 | if ((ft & VT_BTYPE) == VT_BYTE || (ft & VT_BTYPE) == VT_BOOL)
|
---|
[279] | 595 | op|=0x400000;
|
---|
| 596 | o(op|(intr(r)<<12)|fc|(base<<16));
|
---|
| 597 | }
|
---|
| 598 | return;
|
---|
| 599 | }
|
---|
| 600 | } else {
|
---|
| 601 | if (v == VT_CONST) {
|
---|
[331] | 602 | op=stuff_const(0xE3A00000|(intr(r)<<12),sv->c.i);
|
---|
[279] | 603 | if (fr & VT_SYM || !op) {
|
---|
| 604 | o(0xE59F0000|(intr(r)<<12));
|
---|
| 605 | o(0xEA000000);
|
---|
| 606 | if(fr & VT_SYM)
|
---|
| 607 | greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
|
---|
[331] | 608 | o(sv->c.i);
|
---|
[279] | 609 | } else
|
---|
| 610 | o(op);
|
---|
| 611 | return;
|
---|
| 612 | } else if (v == VT_LOCAL) {
|
---|
[331] | 613 | op=stuff_const(0xE28B0000|(intr(r)<<12),sv->c.i);
|
---|
[279] | 614 | if (fr & VT_SYM || !op) {
|
---|
| 615 | o(0xE59F0000|(intr(r)<<12));
|
---|
| 616 | o(0xEA000000);
|
---|
| 617 | if(fr & VT_SYM) // needed ?
|
---|
| 618 | greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
|
---|
[331] | 619 | o(sv->c.i);
|
---|
[279] | 620 | o(0xE08B0000|(intr(r)<<12)|intr(r));
|
---|
| 621 | } else
|
---|
| 622 | o(op);
|
---|
| 623 | return;
|
---|
| 624 | } else if(v == VT_CMP) {
|
---|
[331] | 625 | o(mapcc(sv->c.i)|0x3A00001|(intr(r)<<12));
|
---|
| 626 | o(mapcc(negcc(sv->c.i))|0x3A00000|(intr(r)<<12));
|
---|
[279] | 627 | return;
|
---|
| 628 | } else if (v == VT_JMP || v == VT_JMPI) {
|
---|
| 629 | int t;
|
---|
| 630 | t = v & 1;
|
---|
| 631 | o(0xE3A00000|(intr(r)<<12)|t);
|
---|
| 632 | o(0xEA000000);
|
---|
[331] | 633 | gsym(sv->c.i);
|
---|
[279] | 634 | o(0xE3A00000|(intr(r)<<12)|(t^1));
|
---|
| 635 | return;
|
---|
| 636 | } else if (v < VT_CONST) {
|
---|
| 637 | if(is_float(ft))
|
---|
| 638 | #ifdef TCC_ARM_VFP
|
---|
| 639 | o(0xEEB00A40|(vfpr(r)<<12)|vfpr(v)|T2CPR(ft)); /* fcpyX */
|
---|
| 640 | #else
|
---|
| 641 | o(0xEE008180|(fpr(r)<<12)|fpr(v));
|
---|
| 642 | #endif
|
---|
| 643 | else
|
---|
| 644 | o(0xE1A00000|(intr(r)<<12)|intr(v));
|
---|
| 645 | return;
|
---|
| 646 | }
|
---|
| 647 | }
|
---|
| 648 | tcc_error("load unimplemented!");
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | /* store register 'r' in lvalue 'v' */
|
---|
| 652 | void store(int r, SValue *sv)
|
---|
| 653 | {
|
---|
| 654 | SValue v1;
|
---|
| 655 | int v, ft, fc, fr, sign;
|
---|
| 656 | uint32_t op;
|
---|
| 657 |
|
---|
| 658 | fr = sv->r;
|
---|
| 659 | ft = sv->type.t;
|
---|
[331] | 660 | fc = sv->c.i;
|
---|
[279] | 661 |
|
---|
| 662 | if(fc>=0)
|
---|
| 663 | sign=0;
|
---|
| 664 | else {
|
---|
| 665 | sign=1;
|
---|
| 666 | fc=-fc;
|
---|
| 667 | }
|
---|
[331] | 668 |
|
---|
| 669 | v = fr & VT_VALMASK;
|
---|
[279] | 670 | if (fr & VT_LVAL || fr == VT_LOCAL) {
|
---|
[331] | 671 | uint32_t base = 0xb; /* fp */
|
---|
[279] | 672 | if(v < VT_CONST) {
|
---|
| 673 | base=intr(v);
|
---|
| 674 | v=VT_LOCAL;
|
---|
| 675 | fc=sign=0;
|
---|
| 676 | } else if(v == VT_CONST) {
|
---|
| 677 | v1.type.t = ft;
|
---|
| 678 | v1.r = fr&~VT_LVAL;
|
---|
[331] | 679 | v1.c.i = sv->c.i;
|
---|
[279] | 680 | v1.sym=sv->sym;
|
---|
[331] | 681 | load(TREG_LR, &v1);
|
---|
| 682 | base = 14; /* lr */
|
---|
[279] | 683 | fc=sign=0;
|
---|
[331] | 684 | v=VT_LOCAL;
|
---|
[279] | 685 | }
|
---|
| 686 | if(v == VT_LOCAL) {
|
---|
| 687 | if(is_float(ft)) {
|
---|
| 688 | calcaddr(&base,&fc,&sign,1020,2);
|
---|
| 689 | #ifdef TCC_ARM_VFP
|
---|
| 690 | op=0xED000A00; /* fsts */
|
---|
[331] | 691 | if(!sign)
|
---|
| 692 | op|=0x800000;
|
---|
| 693 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
[279] | 694 | op|=0x100; /* fsts -> fstd */
|
---|
| 695 | o(op|(vfpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
| 696 | #else
|
---|
| 697 | op=0xED000100;
|
---|
| 698 | if(!sign)
|
---|
| 699 | op|=0x800000;
|
---|
| 700 | #if LDOUBLE_SIZE == 8
|
---|
| 701 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
| 702 | op|=0x8000;
|
---|
| 703 | #else
|
---|
| 704 | if ((ft & VT_BTYPE) == VT_DOUBLE)
|
---|
| 705 | op|=0x8000;
|
---|
| 706 | if ((ft & VT_BTYPE) == VT_LDOUBLE)
|
---|
| 707 | op|=0x400000;
|
---|
| 708 | #endif
|
---|
| 709 | o(op|(fpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
| 710 | #endif
|
---|
| 711 | return;
|
---|
| 712 | } else if((ft & VT_BTYPE) == VT_SHORT) {
|
---|
| 713 | calcaddr(&base,&fc,&sign,255,0);
|
---|
| 714 | op=0xE14000B0;
|
---|
| 715 | if(!sign)
|
---|
| 716 | op|=0x800000;
|
---|
| 717 | o(op|(intr(r)<<12)|(base<<16)|((fc&0xf0)<<4)|(fc&0xf));
|
---|
| 718 | } else {
|
---|
| 719 | calcaddr(&base,&fc,&sign,4095,0);
|
---|
| 720 | op=0xE5000000;
|
---|
| 721 | if(!sign)
|
---|
| 722 | op|=0x800000;
|
---|
[331] | 723 | if ((ft & VT_BTYPE) == VT_BYTE || (ft & VT_BTYPE) == VT_BOOL)
|
---|
[279] | 724 | op|=0x400000;
|
---|
| 725 | o(op|(intr(r)<<12)|fc|(base<<16));
|
---|
| 726 | }
|
---|
| 727 | return;
|
---|
| 728 | }
|
---|
| 729 | }
|
---|
| 730 | tcc_error("store unimplemented");
|
---|
| 731 | }
|
---|
| 732 |
|
---|
| 733 | static void gadd_sp(int val)
|
---|
| 734 | {
|
---|
| 735 | stuff_const_harder(0xE28DD000,val);
|
---|
| 736 | }
|
---|
| 737 |
|
---|
| 738 | /* 'is_jmp' is '1' if it is a jump */
|
---|
| 739 | static void gcall_or_jmp(int is_jmp)
|
---|
| 740 | {
|
---|
| 741 | int r;
|
---|
| 742 | if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
|
---|
| 743 | uint32_t x;
|
---|
| 744 | /* constant case */
|
---|
[331] | 745 | x=encbranch(ind,ind+vtop->c.i,0);
|
---|
[279] | 746 | if(x) {
|
---|
| 747 | if (vtop->r & VT_SYM) {
|
---|
| 748 | /* relocation case */
|
---|
| 749 | greloc(cur_text_section, vtop->sym, ind, R_ARM_PC24);
|
---|
| 750 | } else
|
---|
| 751 | put_elf_reloc(symtab_section, cur_text_section, ind, R_ARM_PC24, 0);
|
---|
| 752 | o(x|(is_jmp?0xE0000000:0xE1000000));
|
---|
| 753 | } else {
|
---|
| 754 | if(!is_jmp)
|
---|
| 755 | o(0xE28FE004); // add lr,pc,#4
|
---|
| 756 | o(0xE51FF004); // ldr pc,[pc,#-4]
|
---|
| 757 | if (vtop->r & VT_SYM)
|
---|
| 758 | greloc(cur_text_section, vtop->sym, ind, R_ARM_ABS32);
|
---|
[331] | 759 | o(vtop->c.i);
|
---|
[279] | 760 | }
|
---|
| 761 | } else {
|
---|
| 762 | /* otherwise, indirect call */
|
---|
| 763 | r = gv(RC_INT);
|
---|
| 764 | if(!is_jmp)
|
---|
| 765 | o(0xE1A0E00F); // mov lr,pc
|
---|
| 766 | o(0xE1A0F000|intr(r)); // mov pc,r
|
---|
| 767 | }
|
---|
| 768 | }
|
---|
| 769 |
|
---|
[331] | 770 | static int unalias_ldbl(int btype)
|
---|
[279] | 771 | {
|
---|
[331] | 772 | #if LDOUBLE_SIZE == 8
|
---|
| 773 | if (btype == VT_LDOUBLE)
|
---|
| 774 | btype = VT_DOUBLE;
|
---|
| 775 | #endif
|
---|
| 776 | return btype;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | /* Return whether a structure is an homogeneous float aggregate or not.
|
---|
| 780 | The answer is true if all the elements of the structure are of the same
|
---|
| 781 | primitive float type and there is less than 4 elements.
|
---|
| 782 |
|
---|
| 783 | type: the type corresponding to the structure to be tested */
|
---|
| 784 | static int is_hgen_float_aggr(CType *type)
|
---|
| 785 | {
|
---|
[279] | 786 | if ((type->t & VT_BTYPE) == VT_STRUCT) {
|
---|
| 787 | struct Sym *ref;
|
---|
| 788 | int btype, nb_fields = 0;
|
---|
| 789 |
|
---|
[331] | 790 | ref = type->ref->next;
|
---|
| 791 | btype = unalias_ldbl(ref->type.t & VT_BTYPE);
|
---|
[279] | 792 | if (btype == VT_FLOAT || btype == VT_DOUBLE) {
|
---|
[331] | 793 | for(; ref && btype == unalias_ldbl(ref->type.t & VT_BTYPE); ref = ref->next, nb_fields++);
|
---|
[279] | 794 | return !ref && nb_fields <= 4;
|
---|
| 795 | }
|
---|
| 796 | }
|
---|
| 797 | return 0;
|
---|
| 798 | }
|
---|
| 799 |
|
---|
| 800 | struct avail_regs {
|
---|
[331] | 801 | signed char avail[3]; /* 3 holes max with only float and double alignments */
|
---|
| 802 | int first_hole; /* first available hole */
|
---|
| 803 | int last_hole; /* last available hole (none if equal to first_hole) */
|
---|
| 804 | int first_free_reg; /* next free register in the sequence, hole excluded */
|
---|
[279] | 805 | };
|
---|
| 806 |
|
---|
| 807 | #define AVAIL_REGS_INITIALIZER (struct avail_regs) { { 0, 0, 0}, 0, 0, 0 }
|
---|
| 808 |
|
---|
[331] | 809 | /* Find suitable registers for a VFP Co-Processor Register Candidate (VFP CPRC
|
---|
| 810 | param) according to the rules described in the procedure call standard for
|
---|
| 811 | the ARM architecture (AAPCS). If found, the registers are assigned to this
|
---|
| 812 | VFP CPRC parameter. Registers are allocated in sequence unless a hole exists
|
---|
| 813 | and the parameter is a single float.
|
---|
| 814 |
|
---|
| 815 | avregs: opaque structure to keep track of available VFP co-processor regs
|
---|
| 816 | align: alignment constraints for the param, as returned by type_size()
|
---|
| 817 | size: size of the parameter, as returned by type_size() */
|
---|
| 818 | int assign_vfpreg(struct avail_regs *avregs, int align, int size)
|
---|
[279] | 819 | {
|
---|
| 820 | int first_reg = 0;
|
---|
| 821 |
|
---|
| 822 | if (avregs->first_free_reg == -1)
|
---|
| 823 | return -1;
|
---|
[331] | 824 | if (align >> 3) { /* double alignment */
|
---|
[279] | 825 | first_reg = avregs->first_free_reg;
|
---|
[331] | 826 | /* alignment constraint not respected so use next reg and record hole */
|
---|
[279] | 827 | if (first_reg & 1)
|
---|
| 828 | avregs->avail[avregs->last_hole++] = first_reg++;
|
---|
[331] | 829 | } else { /* no special alignment (float or array of float) */
|
---|
| 830 | /* if single float and a hole is available, assign the param to it */
|
---|
[279] | 831 | if (size == 4 && avregs->first_hole != avregs->last_hole)
|
---|
| 832 | return avregs->avail[avregs->first_hole++];
|
---|
| 833 | else
|
---|
| 834 | first_reg = avregs->first_free_reg;
|
---|
| 835 | }
|
---|
| 836 | if (first_reg + size / 4 <= 16) {
|
---|
| 837 | avregs->first_free_reg = first_reg + size / 4;
|
---|
| 838 | return first_reg;
|
---|
| 839 | }
|
---|
| 840 | avregs->first_free_reg = -1;
|
---|
| 841 | return -1;
|
---|
| 842 | }
|
---|
| 843 |
|
---|
[331] | 844 | /* Returns whether all params need to be passed in core registers or not.
|
---|
| 845 | This is the case for function part of the runtime ABI. */
|
---|
| 846 | int floats_in_core_regs(SValue *sval)
|
---|
[279] | 847 | {
|
---|
[331] | 848 | if (!sval->sym)
|
---|
| 849 | return 0;
|
---|
| 850 |
|
---|
| 851 | switch (sval->sym->v) {
|
---|
| 852 | case TOK___floatundisf:
|
---|
| 853 | case TOK___floatundidf:
|
---|
| 854 | case TOK___fixunssfdi:
|
---|
| 855 | case TOK___fixunsdfdi:
|
---|
| 856 | #ifndef TCC_ARM_VFP
|
---|
| 857 | case TOK___fixunsxfdi:
|
---|
[279] | 858 | #endif
|
---|
[331] | 859 | case TOK___floatdisf:
|
---|
| 860 | case TOK___floatdidf:
|
---|
| 861 | case TOK___fixsfdi:
|
---|
| 862 | case TOK___fixdfdi:
|
---|
| 863 | return 1;
|
---|
[279] | 864 |
|
---|
[331] | 865 | default:
|
---|
| 866 | return 0;
|
---|
| 867 | }
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 | /* Return the number of registers needed to return the struct, or 0 if
|
---|
| 871 | returning via struct pointer. */
|
---|
| 872 | ST_FUNC int gfunc_sret(CType *vt, int variadic, CType *ret, int *ret_align, int *regsize) {
|
---|
[279] | 873 | #ifdef TCC_ARM_EABI
|
---|
[331] | 874 | int size, align;
|
---|
| 875 | size = type_size(vt, &align);
|
---|
| 876 | if (float_abi == ARM_HARD_FLOAT && !variadic &&
|
---|
| 877 | (is_float(vt->t) || is_hgen_float_aggr(vt))) {
|
---|
| 878 | *ret_align = 8;
|
---|
| 879 | *regsize = 8;
|
---|
| 880 | ret->ref = NULL;
|
---|
| 881 | ret->t = VT_DOUBLE;
|
---|
| 882 | return (size + 7) >> 3;
|
---|
| 883 | } else if (size <= 4) {
|
---|
| 884 | *ret_align = 4;
|
---|
| 885 | *regsize = 4;
|
---|
| 886 | ret->ref = NULL;
|
---|
| 887 | ret->t = VT_INT;
|
---|
| 888 | return 1;
|
---|
| 889 | } else
|
---|
| 890 | return 0;
|
---|
| 891 | #else
|
---|
| 892 | return 0;
|
---|
[279] | 893 | #endif
|
---|
[331] | 894 | }
|
---|
| 895 |
|
---|
| 896 | /* Parameters are classified according to how they are copied to their final
|
---|
| 897 | destination for the function call. Because the copying is performed class
|
---|
| 898 | after class according to the order in the union below, it is important that
|
---|
| 899 | some constraints about the order of the members of this union are respected:
|
---|
| 900 | - CORE_STRUCT_CLASS must come after STACK_CLASS;
|
---|
| 901 | - CORE_CLASS must come after STACK_CLASS, CORE_STRUCT_CLASS and
|
---|
| 902 | VFP_STRUCT_CLASS;
|
---|
| 903 | - VFP_STRUCT_CLASS must come after VFP_CLASS.
|
---|
| 904 | See the comment for the main loop in copy_params() for the reason. */
|
---|
| 905 | enum reg_class {
|
---|
| 906 | STACK_CLASS = 0,
|
---|
| 907 | CORE_STRUCT_CLASS,
|
---|
| 908 | VFP_CLASS,
|
---|
| 909 | VFP_STRUCT_CLASS,
|
---|
| 910 | CORE_CLASS,
|
---|
| 911 | NB_CLASSES
|
---|
| 912 | };
|
---|
| 913 |
|
---|
| 914 | struct param_plan {
|
---|
| 915 | int start; /* first reg or addr used depending on the class */
|
---|
| 916 | int end; /* last reg used or next free addr depending on the class */
|
---|
| 917 | SValue *sval; /* pointer to SValue on the value stack */
|
---|
| 918 | struct param_plan *prev; /* previous element in this class */
|
---|
| 919 | };
|
---|
| 920 |
|
---|
| 921 | struct plan {
|
---|
| 922 | struct param_plan *pplans; /* array of all the param plans */
|
---|
| 923 | struct param_plan *clsplans[NB_CLASSES]; /* per class lists of param plans */
|
---|
| 924 | };
|
---|
| 925 |
|
---|
| 926 | #define add_param_plan(plan,pplan,class) \
|
---|
| 927 | do { \
|
---|
| 928 | pplan.prev = plan->clsplans[class]; \
|
---|
| 929 | plan->pplans[plan ## _nb] = pplan; \
|
---|
| 930 | plan->clsplans[class] = &plan->pplans[plan ## _nb++]; \
|
---|
| 931 | } while(0)
|
---|
| 932 |
|
---|
| 933 | /* Assign parameters to registers and stack with alignment according to the
|
---|
| 934 | rules in the procedure call standard for the ARM architecture (AAPCS).
|
---|
| 935 | The overall assignment is recorded in an array of per parameter structures
|
---|
| 936 | called parameter plans. The parameter plans are also further organized in a
|
---|
| 937 | number of linked lists, one per class of parameter (see the comment for the
|
---|
| 938 | definition of union reg_class).
|
---|
| 939 |
|
---|
| 940 | nb_args: number of parameters of the function for which a call is generated
|
---|
| 941 | float_abi: float ABI in use for this function call
|
---|
| 942 | plan: the structure where the overall assignment is recorded
|
---|
| 943 | todo: a bitmap that record which core registers hold a parameter
|
---|
| 944 |
|
---|
| 945 | Returns the amount of stack space needed for parameter passing
|
---|
| 946 |
|
---|
| 947 | Note: this function allocated an array in plan->pplans with tcc_malloc. It
|
---|
| 948 | is the responsibility of the caller to free this array once used (ie not
|
---|
| 949 | before copy_params). */
|
---|
| 950 | static int assign_regs(int nb_args, int float_abi, struct plan *plan, int *todo)
|
---|
| 951 | {
|
---|
| 952 | int i, size, align;
|
---|
| 953 | int ncrn /* next core register number */, nsaa /* next stacked argument address*/;
|
---|
| 954 | int plan_nb = 0;
|
---|
| 955 | struct param_plan pplan;
|
---|
| 956 | struct avail_regs avregs = AVAIL_REGS_INITIALIZER;
|
---|
| 957 |
|
---|
| 958 | ncrn = nsaa = 0;
|
---|
| 959 | *todo = 0;
|
---|
| 960 | plan->pplans = tcc_malloc(nb_args * sizeof(*plan->pplans));
|
---|
| 961 | memset(plan->clsplans, 0, sizeof(plan->clsplans));
|
---|
[279] | 962 | for(i = nb_args; i-- ;) {
|
---|
[331] | 963 | int j, start_vfpreg = 0;
|
---|
| 964 | CType type = vtop[-i].type;
|
---|
| 965 | type.t &= ~VT_ARRAY;
|
---|
| 966 | size = type_size(&type, &align);
|
---|
| 967 | size = (size + 3) & ~3;
|
---|
| 968 | align = (align + 3) & ~3;
|
---|
[279] | 969 | switch(vtop[-i].type.t & VT_BTYPE) {
|
---|
| 970 | case VT_STRUCT:
|
---|
| 971 | case VT_FLOAT:
|
---|
| 972 | case VT_DOUBLE:
|
---|
| 973 | case VT_LDOUBLE:
|
---|
[331] | 974 | if (float_abi == ARM_HARD_FLOAT) {
|
---|
| 975 | int is_hfa = 0; /* Homogeneous float aggregate */
|
---|
[279] | 976 |
|
---|
| 977 | if (is_float(vtop[-i].type.t)
|
---|
[331] | 978 | || (is_hfa = is_hgen_float_aggr(&vtop[-i].type))) {
|
---|
| 979 | int end_vfpreg;
|
---|
[279] | 980 |
|
---|
[331] | 981 | start_vfpreg = assign_vfpreg(&avregs, align, size);
|
---|
| 982 | end_vfpreg = start_vfpreg + ((size - 1) >> 2);
|
---|
| 983 | if (start_vfpreg >= 0) {
|
---|
| 984 | pplan = (struct param_plan) {start_vfpreg, end_vfpreg, &vtop[-i]};
|
---|
| 985 | if (is_hfa)
|
---|
| 986 | add_param_plan(plan, pplan, VFP_STRUCT_CLASS);
|
---|
| 987 | else
|
---|
| 988 | add_param_plan(plan, pplan, VFP_CLASS);
|
---|
[279] | 989 | continue;
|
---|
[331] | 990 | } else
|
---|
[279] | 991 | break;
|
---|
| 992 | }
|
---|
| 993 | }
|
---|
[331] | 994 | ncrn = (ncrn + (align-1)/4) & ~((align/4) - 1);
|
---|
| 995 | if (ncrn + size/4 <= 4 || (ncrn < 4 && start_vfpreg != -1)) {
|
---|
| 996 | /* The parameter is allocated both in core register and on stack. As
|
---|
| 997 | * such, it can be of either class: it would either be the last of
|
---|
| 998 | * CORE_STRUCT_CLASS or the first of STACK_CLASS. */
|
---|
[279] | 999 | for (j = ncrn; j < 4 && j < ncrn + size / 4; j++)
|
---|
[331] | 1000 | *todo|=(1<<j);
|
---|
| 1001 | pplan = (struct param_plan) {ncrn, j, &vtop[-i]};
|
---|
| 1002 | add_param_plan(plan, pplan, CORE_STRUCT_CLASS);
|
---|
| 1003 | ncrn += size/4;
|
---|
| 1004 | if (ncrn > 4)
|
---|
| 1005 | nsaa = (ncrn - 4) * 4;
|
---|
| 1006 | } else {
|
---|
[279] | 1007 | ncrn = 4;
|
---|
| 1008 | break;
|
---|
| 1009 | }
|
---|
| 1010 | continue;
|
---|
| 1011 | default:
|
---|
| 1012 | if (ncrn < 4) {
|
---|
| 1013 | int is_long = (vtop[-i].type.t & VT_BTYPE) == VT_LLONG;
|
---|
| 1014 |
|
---|
| 1015 | if (is_long) {
|
---|
| 1016 | ncrn = (ncrn + 1) & -2;
|
---|
[331] | 1017 | if (ncrn == 4)
|
---|
[279] | 1018 | break;
|
---|
| 1019 | }
|
---|
[331] | 1020 | pplan = (struct param_plan) {ncrn, ncrn, &vtop[-i]};
|
---|
| 1021 | ncrn++;
|
---|
| 1022 | if (is_long)
|
---|
| 1023 | pplan.end = ncrn++;
|
---|
| 1024 | add_param_plan(plan, pplan, CORE_CLASS);
|
---|
[279] | 1025 | continue;
|
---|
| 1026 | }
|
---|
| 1027 | }
|
---|
[331] | 1028 | nsaa = (nsaa + (align - 1)) & ~(align - 1);
|
---|
| 1029 | pplan = (struct param_plan) {nsaa, nsaa + size, &vtop[-i]};
|
---|
| 1030 | add_param_plan(plan, pplan, STACK_CLASS);
|
---|
| 1031 | nsaa += size; /* size already rounded up before */
|
---|
[279] | 1032 | }
|
---|
[331] | 1033 | return nsaa;
|
---|
| 1034 | }
|
---|
| 1035 |
|
---|
| 1036 | #undef add_param_plan
|
---|
| 1037 |
|
---|
| 1038 | /* Copy parameters to their final destination (core reg, VFP reg or stack) for
|
---|
| 1039 | function call.
|
---|
| 1040 |
|
---|
| 1041 | nb_args: number of parameters the function take
|
---|
| 1042 | plan: the overall assignment plan for parameters
|
---|
| 1043 | todo: a bitmap indicating what core reg will hold a parameter
|
---|
| 1044 |
|
---|
| 1045 | Returns the number of SValue added by this function on the value stack */
|
---|
| 1046 | static int copy_params(int nb_args, struct plan *plan, int todo)
|
---|
| 1047 | {
|
---|
| 1048 | int size, align, r, i, nb_extra_sval = 0;
|
---|
| 1049 | struct param_plan *pplan;
|
---|
| 1050 | int pass = 0;
|
---|
| 1051 |
|
---|
| 1052 | /* Several constraints require parameters to be copied in a specific order:
|
---|
| 1053 | - structures are copied to the stack before being loaded in a reg;
|
---|
| 1054 | - floats loaded to an odd numbered VFP reg are first copied to the
|
---|
| 1055 | preceding even numbered VFP reg and then moved to the next VFP reg.
|
---|
| 1056 |
|
---|
| 1057 | It is thus important that:
|
---|
| 1058 | - structures assigned to core regs must be copied after parameters
|
---|
| 1059 | assigned to the stack but before structures assigned to VFP regs because
|
---|
| 1060 | a structure can lie partly in core registers and partly on the stack;
|
---|
| 1061 | - parameters assigned to the stack and all structures be copied before
|
---|
| 1062 | parameters assigned to a core reg since copying a parameter to the stack
|
---|
| 1063 | require using a core reg;
|
---|
| 1064 | - parameters assigned to VFP regs be copied before structures assigned to
|
---|
| 1065 | VFP regs as the copy might use an even numbered VFP reg that already
|
---|
| 1066 | holds part of a structure. */
|
---|
| 1067 | again:
|
---|
| 1068 | for(i = 0; i < NB_CLASSES; i++) {
|
---|
| 1069 | for(pplan = plan->clsplans[i]; pplan; pplan = pplan->prev) {
|
---|
| 1070 |
|
---|
| 1071 | if (pass
|
---|
| 1072 | && (i != CORE_CLASS || pplan->sval->r < VT_CONST))
|
---|
[279] | 1073 | continue;
|
---|
[331] | 1074 |
|
---|
| 1075 | vpushv(pplan->sval);
|
---|
| 1076 | pplan->sval->r = pplan->sval->r2 = VT_CONST; /* disable entry */
|
---|
| 1077 | switch(i) {
|
---|
| 1078 | case STACK_CLASS:
|
---|
| 1079 | case CORE_STRUCT_CLASS:
|
---|
| 1080 | case VFP_STRUCT_CLASS:
|
---|
| 1081 | if ((pplan->sval->type.t & VT_BTYPE) == VT_STRUCT) {
|
---|
| 1082 | int padding = 0;
|
---|
| 1083 | size = type_size(&pplan->sval->type, &align);
|
---|
| 1084 | /* align to stack align size */
|
---|
| 1085 | size = (size + 3) & ~3;
|
---|
| 1086 | if (i == STACK_CLASS && pplan->prev)
|
---|
| 1087 | padding = pplan->start - pplan->prev->end;
|
---|
| 1088 | size += padding; /* Add padding if any */
|
---|
| 1089 | /* allocate the necessary size on stack */
|
---|
| 1090 | gadd_sp(-size);
|
---|
| 1091 | /* generate structure store */
|
---|
| 1092 | r = get_reg(RC_INT);
|
---|
| 1093 | o(0xE28D0000|(intr(r)<<12)|padding); /* add r, sp, padding */
|
---|
| 1094 | vset(&vtop->type, r | VT_LVAL, 0);
|
---|
| 1095 | vswap();
|
---|
| 1096 | vstore(); /* memcpy to current sp + potential padding */
|
---|
| 1097 |
|
---|
| 1098 | /* Homogeneous float aggregate are loaded to VFP registers
|
---|
| 1099 | immediately since there is no way of loading data in multiple
|
---|
| 1100 | non consecutive VFP registers as what is done for other
|
---|
| 1101 | structures (see the use of todo). */
|
---|
| 1102 | if (i == VFP_STRUCT_CLASS) {
|
---|
| 1103 | int first = pplan->start, nb = pplan->end - first + 1;
|
---|
| 1104 | /* vpop.32 {pplan->start, ..., pplan->end} */
|
---|
| 1105 | o(0xECBD0A00|(first&1)<<22|(first>>1)<<12|nb);
|
---|
| 1106 | /* No need to write the register used to a SValue since VFP regs
|
---|
| 1107 | cannot be used for gcall_or_jmp */
|
---|
| 1108 | }
|
---|
| 1109 | } else {
|
---|
| 1110 | if (is_float(pplan->sval->type.t)) {
|
---|
[279] | 1111 | #ifdef TCC_ARM_VFP
|
---|
[331] | 1112 | r = vfpr(gv(RC_FLOAT)) << 12;
|
---|
| 1113 | if ((pplan->sval->type.t & VT_BTYPE) == VT_FLOAT)
|
---|
| 1114 | size = 4;
|
---|
| 1115 | else {
|
---|
| 1116 | size = 8;
|
---|
| 1117 | r |= 0x101; /* vpush.32 -> vpush.64 */
|
---|
| 1118 | }
|
---|
| 1119 | o(0xED2D0A01 + r); /* vpush */
|
---|
[279] | 1120 | #else
|
---|
[331] | 1121 | r = fpr(gv(RC_FLOAT)) << 12;
|
---|
| 1122 | if ((pplan->sval->type.t & VT_BTYPE) == VT_FLOAT)
|
---|
| 1123 | size = 4;
|
---|
| 1124 | else if ((pplan->sval->type.t & VT_BTYPE) == VT_DOUBLE)
|
---|
| 1125 | size = 8;
|
---|
| 1126 | else
|
---|
| 1127 | size = LDOUBLE_SIZE;
|
---|
[279] | 1128 |
|
---|
[331] | 1129 | if (size == 12)
|
---|
| 1130 | r |= 0x400000;
|
---|
| 1131 | else if(size == 8)
|
---|
| 1132 | r|=0x8000;
|
---|
| 1133 |
|
---|
| 1134 | o(0xED2D0100|r|(size>>2)); /* some kind of vpush for FPA */
|
---|
[279] | 1135 | #endif
|
---|
[331] | 1136 | } else {
|
---|
| 1137 | /* simple type (currently always same size) */
|
---|
| 1138 | /* XXX: implicit cast ? */
|
---|
| 1139 | size=4;
|
---|
| 1140 | if ((pplan->sval->type.t & VT_BTYPE) == VT_LLONG) {
|
---|
| 1141 | lexpand_nr();
|
---|
| 1142 | size = 8;
|
---|
| 1143 | r = gv(RC_INT);
|
---|
| 1144 | o(0xE52D0004|(intr(r)<<12)); /* push r */
|
---|
| 1145 | vtop--;
|
---|
| 1146 | }
|
---|
| 1147 | r = gv(RC_INT);
|
---|
| 1148 | o(0xE52D0004|(intr(r)<<12)); /* push r */
|
---|
| 1149 | }
|
---|
| 1150 | if (i == STACK_CLASS && pplan->prev)
|
---|
| 1151 | gadd_sp(pplan->prev->end - pplan->start); /* Add padding if any */
|
---|
| 1152 | }
|
---|
| 1153 | break;
|
---|
| 1154 |
|
---|
| 1155 | case VFP_CLASS:
|
---|
| 1156 | gv(regmask(TREG_F0 + (pplan->start >> 1)));
|
---|
| 1157 | if (pplan->start & 1) { /* Must be in upper part of double register */
|
---|
| 1158 | o(0xEEF00A40|((pplan->start>>1)<<12)|(pplan->start>>1)); /* vmov.f32 s(n+1), sn */
|
---|
| 1159 | vtop->r = VT_CONST; /* avoid being saved on stack by gv for next float */
|
---|
| 1160 | }
|
---|
| 1161 | break;
|
---|
| 1162 |
|
---|
| 1163 | case CORE_CLASS:
|
---|
| 1164 | if ((pplan->sval->type.t & VT_BTYPE) == VT_LLONG) {
|
---|
| 1165 | lexpand_nr();
|
---|
| 1166 | gv(regmask(pplan->end));
|
---|
| 1167 | pplan->sval->r2 = vtop->r;
|
---|
| 1168 | vtop--;
|
---|
| 1169 | }
|
---|
| 1170 | gv(regmask(pplan->start));
|
---|
| 1171 | /* Mark register as used so that gcall_or_jmp use another one
|
---|
| 1172 | (regs >=4 are free as never used to pass parameters) */
|
---|
| 1173 | pplan->sval->r = vtop->r;
|
---|
| 1174 | break;
|
---|
| 1175 | }
|
---|
[279] | 1176 | vtop--;
|
---|
| 1177 | }
|
---|
| 1178 | }
|
---|
[331] | 1179 |
|
---|
| 1180 | /* second pass to restore registers that were saved on stack by accident.
|
---|
| 1181 | Maybe redundant after the "lvalue_save" patch in tccgen.c:gv() */
|
---|
| 1182 | if (++pass < 2)
|
---|
| 1183 | goto again;
|
---|
| 1184 |
|
---|
| 1185 | /* Manually free remaining registers since next parameters are loaded
|
---|
| 1186 | * manually, without the help of gv(int). */
|
---|
| 1187 | save_regs(nb_args);
|
---|
| 1188 |
|
---|
| 1189 | if(todo) {
|
---|
| 1190 | o(0xE8BD0000|todo); /* pop {todo} */
|
---|
| 1191 | for(pplan = plan->clsplans[CORE_STRUCT_CLASS]; pplan; pplan = pplan->prev) {
|
---|
| 1192 | int r;
|
---|
| 1193 | pplan->sval->r = pplan->start;
|
---|
| 1194 | /* An SValue can only pin 2 registers at best (r and r2) but a structure
|
---|
| 1195 | can occupy more than 2 registers. Thus, we need to push on the value
|
---|
| 1196 | stack some fake parameter to have on SValue for each registers used
|
---|
| 1197 | by a structure (r2 is not used). */
|
---|
| 1198 | for (r = pplan->start + 1; r <= pplan->end; r++) {
|
---|
| 1199 | if (todo & (1 << r)) {
|
---|
| 1200 | nb_extra_sval++;
|
---|
| 1201 | vpushi(0);
|
---|
| 1202 | vtop->r = r;
|
---|
| 1203 | }
|
---|
| 1204 | }
|
---|
[279] | 1205 | }
|
---|
| 1206 | }
|
---|
[331] | 1207 | return nb_extra_sval;
|
---|
| 1208 | }
|
---|
| 1209 |
|
---|
| 1210 | /* Generate function call. The function address is pushed first, then
|
---|
| 1211 | all the parameters in call order. This functions pops all the
|
---|
| 1212 | parameters and the function address. */
|
---|
| 1213 | void gfunc_call(int nb_args)
|
---|
| 1214 | {
|
---|
| 1215 | int r, args_size;
|
---|
| 1216 | int def_float_abi = float_abi;
|
---|
| 1217 | int todo;
|
---|
| 1218 | struct plan plan;
|
---|
| 1219 |
|
---|
| 1220 | #ifdef TCC_ARM_EABI
|
---|
| 1221 | int variadic;
|
---|
| 1222 |
|
---|
| 1223 | if (float_abi == ARM_HARD_FLOAT) {
|
---|
| 1224 | variadic = (vtop[-nb_args].type.ref->f.func_type == FUNC_ELLIPSIS);
|
---|
| 1225 | if (variadic || floats_in_core_regs(&vtop[-nb_args]))
|
---|
| 1226 | float_abi = ARM_SOFTFP_FLOAT;
|
---|
[279] | 1227 | }
|
---|
[331] | 1228 | #endif
|
---|
| 1229 | /* cannot let cpu flags if other instruction are generated. Also avoid leaving
|
---|
| 1230 | VT_JMP anywhere except on the top of the stack because it would complicate
|
---|
| 1231 | the code generator. */
|
---|
| 1232 | r = vtop->r & VT_VALMASK;
|
---|
| 1233 | if (r == VT_CMP || (r & ~1) == VT_JMP)
|
---|
| 1234 | gv(RC_INT);
|
---|
[279] | 1235 |
|
---|
[331] | 1236 | args_size = assign_regs(nb_args, float_abi, &plan, &todo);
|
---|
| 1237 |
|
---|
| 1238 | #ifdef TCC_ARM_EABI
|
---|
| 1239 | if (args_size & 7) { /* Stack must be 8 byte aligned at fct call for EABI */
|
---|
| 1240 | args_size = (args_size + 7) & ~7;
|
---|
| 1241 | o(0xE24DD004); /* sub sp, sp, #4 */
|
---|
[279] | 1242 | }
|
---|
[331] | 1243 | #endif
|
---|
| 1244 |
|
---|
| 1245 | nb_args += copy_params(nb_args, &plan, todo);
|
---|
| 1246 | tcc_free(plan.pplans);
|
---|
| 1247 |
|
---|
| 1248 | /* Move fct SValue on top as required by gcall_or_jmp */
|
---|
| 1249 | vrotb(nb_args + 1);
|
---|
[279] | 1250 | gcall_or_jmp(0);
|
---|
| 1251 | if (args_size)
|
---|
[331] | 1252 | gadd_sp(args_size); /* pop all parameters passed on the stack */
|
---|
| 1253 | #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
|
---|
| 1254 | if(float_abi == ARM_SOFTFP_FLOAT && is_float(vtop->type.ref->type.t)) {
|
---|
[279] | 1255 | if((vtop->type.ref->type.t & VT_BTYPE) == VT_FLOAT) {
|
---|
[331] | 1256 | o(0xEE000A10); /*vmov s0, r0 */
|
---|
[279] | 1257 | } else {
|
---|
[331] | 1258 | o(0xEE000B10); /* vmov.32 d0[0], r0 */
|
---|
| 1259 | o(0xEE201B10); /* vmov.32 d0[1], r1 */
|
---|
[279] | 1260 | }
|
---|
| 1261 | }
|
---|
| 1262 | #endif
|
---|
[331] | 1263 | vtop -= nb_args + 1; /* Pop all params and fct address from value stack */
|
---|
| 1264 | leaffunc = 0; /* we are calling a function, so we aren't in a leaf function */
|
---|
| 1265 | float_abi = def_float_abi;
|
---|
[279] | 1266 | }
|
---|
| 1267 |
|
---|
| 1268 | /* generate function prolog of type 't' */
|
---|
| 1269 | void gfunc_prolog(CType *func_type)
|
---|
| 1270 | {
|
---|
| 1271 | Sym *sym,*sym2;
|
---|
[331] | 1272 | int n, nf, size, align, rs, struct_ret = 0;
|
---|
| 1273 | int addr, pn, sn; /* pn=core, sn=stack */
|
---|
| 1274 | CType ret_type;
|
---|
| 1275 |
|
---|
| 1276 | #ifdef TCC_ARM_EABI
|
---|
[279] | 1277 | struct avail_regs avregs = AVAIL_REGS_INITIALIZER;
|
---|
| 1278 | #endif
|
---|
| 1279 |
|
---|
| 1280 | sym = func_type->ref;
|
---|
| 1281 | func_vt = sym->type;
|
---|
[331] | 1282 | func_var = (func_type->ref->f.func_type == FUNC_ELLIPSIS);
|
---|
[279] | 1283 |
|
---|
| 1284 | n = nf = 0;
|
---|
[331] | 1285 | if ((func_vt.t & VT_BTYPE) == VT_STRUCT &&
|
---|
| 1286 | !gfunc_sret(&func_vt, func_var, &ret_type, &align, &rs))
|
---|
[279] | 1287 | {
|
---|
| 1288 | n++;
|
---|
| 1289 | struct_ret = 1;
|
---|
| 1290 | func_vc = 12; /* Offset from fp of the place to store the result */
|
---|
| 1291 | }
|
---|
[331] | 1292 | for(sym2 = sym->next; sym2 && (n < 4 || nf < 16); sym2 = sym2->next) {
|
---|
[279] | 1293 | size = type_size(&sym2->type, &align);
|
---|
[331] | 1294 | #ifdef TCC_ARM_EABI
|
---|
| 1295 | if (float_abi == ARM_HARD_FLOAT && !func_var &&
|
---|
| 1296 | (is_float(sym2->type.t) || is_hgen_float_aggr(&sym2->type))) {
|
---|
| 1297 | int tmpnf = assign_vfpreg(&avregs, align, size);
|
---|
| 1298 | tmpnf += (size + 3) / 4;
|
---|
[279] | 1299 | nf = (tmpnf > nf) ? tmpnf : nf;
|
---|
| 1300 | } else
|
---|
| 1301 | #endif
|
---|
| 1302 | if (n < 4)
|
---|
| 1303 | n += (size + 3) / 4;
|
---|
| 1304 | }
|
---|
| 1305 | o(0xE1A0C00D); /* mov ip,sp */
|
---|
[331] | 1306 | if (func_var)
|
---|
[279] | 1307 | n=4;
|
---|
[331] | 1308 | if (n) {
|
---|
[279] | 1309 | if(n>4)
|
---|
| 1310 | n=4;
|
---|
| 1311 | #ifdef TCC_ARM_EABI
|
---|
| 1312 | n=(n+1)&-2;
|
---|
| 1313 | #endif
|
---|
| 1314 | o(0xE92D0000|((1<<n)-1)); /* save r0-r4 on stack if needed */
|
---|
| 1315 | }
|
---|
| 1316 | if (nf) {
|
---|
| 1317 | if (nf>16)
|
---|
| 1318 | nf=16;
|
---|
| 1319 | nf=(nf+1)&-2; /* nf => HARDFLOAT => EABI */
|
---|
| 1320 | o(0xED2D0A00|nf); /* save s0-s15 on stack if needed */
|
---|
| 1321 | }
|
---|
| 1322 | o(0xE92D5800); /* save fp, ip, lr */
|
---|
| 1323 | o(0xE1A0B00D); /* mov fp, sp */
|
---|
| 1324 | func_sub_sp_offset = ind;
|
---|
[331] | 1325 | o(0xE1A00000); /* nop, leave space for stack adjustment in epilog */
|
---|
[279] | 1326 |
|
---|
[331] | 1327 | #ifdef TCC_ARM_EABI
|
---|
| 1328 | if (float_abi == ARM_HARD_FLOAT) {
|
---|
| 1329 | func_vc += nf * 4;
|
---|
[279] | 1330 | avregs = AVAIL_REGS_INITIALIZER;
|
---|
[331] | 1331 | }
|
---|
[279] | 1332 | #endif
|
---|
[331] | 1333 | pn = struct_ret, sn = 0;
|
---|
| 1334 | while ((sym = sym->next)) {
|
---|
| 1335 | CType *type;
|
---|
| 1336 | type = &sym->type;
|
---|
| 1337 | size = type_size(type, &align);
|
---|
| 1338 | size = (size + 3) >> 2;
|
---|
| 1339 | align = (align + 3) & ~3;
|
---|
| 1340 | #ifdef TCC_ARM_EABI
|
---|
| 1341 | if (float_abi == ARM_HARD_FLOAT && !func_var && (is_float(sym->type.t)
|
---|
| 1342 | || is_hgen_float_aggr(&sym->type))) {
|
---|
| 1343 | int fpn = assign_vfpreg(&avregs, align, size << 2);
|
---|
| 1344 | if (fpn >= 0)
|
---|
| 1345 | addr = fpn * 4;
|
---|
| 1346 | else
|
---|
| 1347 | goto from_stack;
|
---|
| 1348 | } else
|
---|
[279] | 1349 | #endif
|
---|
[331] | 1350 | if (pn < 4) {
|
---|
[279] | 1351 | #ifdef TCC_ARM_EABI
|
---|
| 1352 | pn = (pn + (align-1)/4) & -(align/4);
|
---|
| 1353 | #endif
|
---|
[331] | 1354 | addr = (nf + pn) * 4;
|
---|
| 1355 | pn += size;
|
---|
| 1356 | if (!sn && pn > 4)
|
---|
| 1357 | sn = (pn - 4);
|
---|
| 1358 | } else {
|
---|
| 1359 | #ifdef TCC_ARM_EABI
|
---|
[279] | 1360 | from_stack:
|
---|
| 1361 | sn = (sn + (align-1)/4) & -(align/4);
|
---|
| 1362 | #endif
|
---|
[331] | 1363 | addr = (n + nf + sn) * 4;
|
---|
| 1364 | sn += size;
|
---|
[279] | 1365 | }
|
---|
[331] | 1366 | sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | lvalue_type(type->t),
|
---|
| 1367 | addr + 12);
|
---|
[279] | 1368 | }
|
---|
| 1369 | last_itod_magic=0;
|
---|
| 1370 | leaffunc = 1;
|
---|
| 1371 | loc = 0;
|
---|
| 1372 | }
|
---|
| 1373 |
|
---|
| 1374 | /* generate function epilog */
|
---|
| 1375 | void gfunc_epilog(void)
|
---|
| 1376 | {
|
---|
| 1377 | uint32_t x;
|
---|
| 1378 | int diff;
|
---|
[331] | 1379 | /* Copy float return value to core register if base standard is used and
|
---|
| 1380 | float computation is made with VFP */
|
---|
| 1381 | #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
|
---|
| 1382 | if ((float_abi == ARM_SOFTFP_FLOAT || func_var) && is_float(func_vt.t)) {
|
---|
[279] | 1383 | if((func_vt.t & VT_BTYPE) == VT_FLOAT)
|
---|
| 1384 | o(0xEE100A10); /* fmrs r0, s0 */
|
---|
| 1385 | else {
|
---|
| 1386 | o(0xEE100B10); /* fmrdl r0, d0 */
|
---|
| 1387 | o(0xEE301B10); /* fmrdh r1, d0 */
|
---|
| 1388 | }
|
---|
| 1389 | }
|
---|
| 1390 | #endif
|
---|
| 1391 | o(0xE89BA800); /* restore fp, sp, pc */
|
---|
| 1392 | diff = (-loc + 3) & -4;
|
---|
| 1393 | #ifdef TCC_ARM_EABI
|
---|
| 1394 | if(!leaffunc)
|
---|
| 1395 | diff = ((diff + 11) & -8) - 4;
|
---|
| 1396 | #endif
|
---|
| 1397 | if(diff > 0) {
|
---|
| 1398 | x=stuff_const(0xE24BD000, diff); /* sub sp,fp,# */
|
---|
| 1399 | if(x)
|
---|
| 1400 | *(uint32_t *)(cur_text_section->data + func_sub_sp_offset) = x;
|
---|
| 1401 | else {
|
---|
| 1402 | int addr;
|
---|
| 1403 | addr=ind;
|
---|
| 1404 | o(0xE59FC004); /* ldr ip,[pc+4] */
|
---|
| 1405 | o(0xE04BD00C); /* sub sp,fp,ip */
|
---|
| 1406 | o(0xE1A0F00E); /* mov pc,lr */
|
---|
| 1407 | o(diff);
|
---|
| 1408 | *(uint32_t *)(cur_text_section->data + func_sub_sp_offset) = 0xE1000000|encbranch(func_sub_sp_offset,addr,1);
|
---|
| 1409 | }
|
---|
| 1410 | }
|
---|
| 1411 | }
|
---|
| 1412 |
|
---|
| 1413 | /* generate a jump to a label */
|
---|
| 1414 | int gjmp(int t)
|
---|
| 1415 | {
|
---|
| 1416 | int r;
|
---|
[331] | 1417 | if (nocode_wanted)
|
---|
| 1418 | return t;
|
---|
[279] | 1419 | r=ind;
|
---|
| 1420 | o(0xE0000000|encbranch(r,t,1));
|
---|
| 1421 | return r;
|
---|
| 1422 | }
|
---|
| 1423 |
|
---|
| 1424 | /* generate a jump to a fixed address */
|
---|
| 1425 | void gjmp_addr(int a)
|
---|
| 1426 | {
|
---|
| 1427 | gjmp(a);
|
---|
| 1428 | }
|
---|
| 1429 |
|
---|
| 1430 | /* generate a test. set 'inv' to invert test. Stack entry is popped */
|
---|
| 1431 | int gtst(int inv, int t)
|
---|
| 1432 | {
|
---|
| 1433 | int v, r;
|
---|
| 1434 | uint32_t op;
|
---|
[331] | 1435 |
|
---|
[279] | 1436 | v = vtop->r & VT_VALMASK;
|
---|
| 1437 | r=ind;
|
---|
[331] | 1438 |
|
---|
| 1439 | if (nocode_wanted) {
|
---|
| 1440 | ;
|
---|
| 1441 | } else if (v == VT_CMP) {
|
---|
[279] | 1442 | op=mapcc(inv?negcc(vtop->c.i):vtop->c.i);
|
---|
| 1443 | op|=encbranch(r,t,1);
|
---|
| 1444 | o(op);
|
---|
| 1445 | t=r;
|
---|
| 1446 | } else if (v == VT_JMP || v == VT_JMPI) {
|
---|
| 1447 | if ((v & 1) == inv) {
|
---|
| 1448 | if(!vtop->c.i)
|
---|
| 1449 | vtop->c.i=t;
|
---|
| 1450 | else {
|
---|
| 1451 | uint32_t *x;
|
---|
| 1452 | int p,lp;
|
---|
| 1453 | if(t) {
|
---|
| 1454 | p = vtop->c.i;
|
---|
| 1455 | do {
|
---|
| 1456 | p = decbranch(lp=p);
|
---|
| 1457 | } while(p);
|
---|
| 1458 | x = (uint32_t *)(cur_text_section->data + lp);
|
---|
| 1459 | *x &= 0xff000000;
|
---|
| 1460 | *x |= encbranch(lp,t,1);
|
---|
| 1461 | }
|
---|
| 1462 | t = vtop->c.i;
|
---|
| 1463 | }
|
---|
| 1464 | } else {
|
---|
| 1465 | t = gjmp(t);
|
---|
| 1466 | gsym(vtop->c.i);
|
---|
| 1467 | }
|
---|
| 1468 | }
|
---|
| 1469 | vtop--;
|
---|
| 1470 | return t;
|
---|
| 1471 | }
|
---|
| 1472 |
|
---|
| 1473 | /* generate an integer binary operation */
|
---|
| 1474 | void gen_opi(int op)
|
---|
| 1475 | {
|
---|
| 1476 | int c, func = 0;
|
---|
| 1477 | uint32_t opc = 0, r, fr;
|
---|
| 1478 | unsigned short retreg = REG_IRET;
|
---|
| 1479 |
|
---|
| 1480 | c=0;
|
---|
| 1481 | switch(op) {
|
---|
| 1482 | case '+':
|
---|
| 1483 | opc = 0x8;
|
---|
| 1484 | c=1;
|
---|
| 1485 | break;
|
---|
| 1486 | case TOK_ADDC1: /* add with carry generation */
|
---|
| 1487 | opc = 0x9;
|
---|
| 1488 | c=1;
|
---|
| 1489 | break;
|
---|
| 1490 | case '-':
|
---|
| 1491 | opc = 0x4;
|
---|
| 1492 | c=1;
|
---|
| 1493 | break;
|
---|
| 1494 | case TOK_SUBC1: /* sub with carry generation */
|
---|
| 1495 | opc = 0x5;
|
---|
| 1496 | c=1;
|
---|
| 1497 | break;
|
---|
| 1498 | case TOK_ADDC2: /* add with carry use */
|
---|
| 1499 | opc = 0xA;
|
---|
| 1500 | c=1;
|
---|
| 1501 | break;
|
---|
| 1502 | case TOK_SUBC2: /* sub with carry use */
|
---|
| 1503 | opc = 0xC;
|
---|
| 1504 | c=1;
|
---|
| 1505 | break;
|
---|
| 1506 | case '&':
|
---|
| 1507 | opc = 0x0;
|
---|
| 1508 | c=1;
|
---|
| 1509 | break;
|
---|
| 1510 | case '^':
|
---|
| 1511 | opc = 0x2;
|
---|
| 1512 | c=1;
|
---|
| 1513 | break;
|
---|
| 1514 | case '|':
|
---|
| 1515 | opc = 0x18;
|
---|
| 1516 | c=1;
|
---|
| 1517 | break;
|
---|
| 1518 | case '*':
|
---|
| 1519 | gv2(RC_INT, RC_INT);
|
---|
| 1520 | r = vtop[-1].r;
|
---|
| 1521 | fr = vtop[0].r;
|
---|
| 1522 | vtop--;
|
---|
| 1523 | o(0xE0000090|(intr(r)<<16)|(intr(r)<<8)|intr(fr));
|
---|
| 1524 | return;
|
---|
| 1525 | case TOK_SHL:
|
---|
| 1526 | opc = 0;
|
---|
| 1527 | c=2;
|
---|
| 1528 | break;
|
---|
| 1529 | case TOK_SHR:
|
---|
| 1530 | opc = 1;
|
---|
| 1531 | c=2;
|
---|
| 1532 | break;
|
---|
| 1533 | case TOK_SAR:
|
---|
| 1534 | opc = 2;
|
---|
| 1535 | c=2;
|
---|
| 1536 | break;
|
---|
| 1537 | case '/':
|
---|
| 1538 | case TOK_PDIV:
|
---|
| 1539 | func=TOK___divsi3;
|
---|
| 1540 | c=3;
|
---|
| 1541 | break;
|
---|
| 1542 | case TOK_UDIV:
|
---|
| 1543 | func=TOK___udivsi3;
|
---|
| 1544 | c=3;
|
---|
| 1545 | break;
|
---|
| 1546 | case '%':
|
---|
| 1547 | #ifdef TCC_ARM_EABI
|
---|
| 1548 | func=TOK___aeabi_idivmod;
|
---|
| 1549 | retreg=REG_LRET;
|
---|
| 1550 | #else
|
---|
| 1551 | func=TOK___modsi3;
|
---|
| 1552 | #endif
|
---|
| 1553 | c=3;
|
---|
| 1554 | break;
|
---|
| 1555 | case TOK_UMOD:
|
---|
| 1556 | #ifdef TCC_ARM_EABI
|
---|
| 1557 | func=TOK___aeabi_uidivmod;
|
---|
| 1558 | retreg=REG_LRET;
|
---|
| 1559 | #else
|
---|
| 1560 | func=TOK___umodsi3;
|
---|
| 1561 | #endif
|
---|
| 1562 | c=3;
|
---|
| 1563 | break;
|
---|
| 1564 | case TOK_UMULL:
|
---|
| 1565 | gv2(RC_INT, RC_INT);
|
---|
| 1566 | r=intr(vtop[-1].r2=get_reg(RC_INT));
|
---|
| 1567 | c=vtop[-1].r;
|
---|
| 1568 | vtop[-1].r=get_reg_ex(RC_INT,regmask(c));
|
---|
| 1569 | vtop--;
|
---|
| 1570 | o(0xE0800090|(r<<16)|(intr(vtop->r)<<12)|(intr(c)<<8)|intr(vtop[1].r));
|
---|
| 1571 | return;
|
---|
| 1572 | default:
|
---|
| 1573 | opc = 0x15;
|
---|
| 1574 | c=1;
|
---|
| 1575 | break;
|
---|
| 1576 | }
|
---|
| 1577 | switch(c) {
|
---|
| 1578 | case 1:
|
---|
| 1579 | if((vtop[-1].r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
| 1580 | if(opc == 4 || opc == 5 || opc == 0xc) {
|
---|
| 1581 | vswap();
|
---|
| 1582 | opc|=2; // sub -> rsb
|
---|
| 1583 | }
|
---|
| 1584 | }
|
---|
| 1585 | if ((vtop->r & VT_VALMASK) == VT_CMP ||
|
---|
| 1586 | (vtop->r & (VT_VALMASK & ~1)) == VT_JMP)
|
---|
| 1587 | gv(RC_INT);
|
---|
| 1588 | vswap();
|
---|
| 1589 | c=intr(gv(RC_INT));
|
---|
| 1590 | vswap();
|
---|
| 1591 | opc=0xE0000000|(opc<<20)|(c<<16);
|
---|
| 1592 | if((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
| 1593 | uint32_t x;
|
---|
| 1594 | x=stuff_const(opc|0x2000000,vtop->c.i);
|
---|
| 1595 | if(x) {
|
---|
| 1596 | r=intr(vtop[-1].r=get_reg_ex(RC_INT,regmask(vtop[-1].r)));
|
---|
| 1597 | o(x|(r<<12));
|
---|
| 1598 | goto done;
|
---|
| 1599 | }
|
---|
| 1600 | }
|
---|
| 1601 | fr=intr(gv(RC_INT));
|
---|
| 1602 | r=intr(vtop[-1].r=get_reg_ex(RC_INT,two2mask(vtop->r,vtop[-1].r)));
|
---|
| 1603 | o(opc|(r<<12)|fr);
|
---|
| 1604 | done:
|
---|
| 1605 | vtop--;
|
---|
| 1606 | if (op >= TOK_ULT && op <= TOK_GT) {
|
---|
| 1607 | vtop->r = VT_CMP;
|
---|
| 1608 | vtop->c.i = op;
|
---|
| 1609 | }
|
---|
| 1610 | break;
|
---|
| 1611 | case 2:
|
---|
| 1612 | opc=0xE1A00000|(opc<<5);
|
---|
| 1613 | if ((vtop->r & VT_VALMASK) == VT_CMP ||
|
---|
| 1614 | (vtop->r & (VT_VALMASK & ~1)) == VT_JMP)
|
---|
| 1615 | gv(RC_INT);
|
---|
| 1616 | vswap();
|
---|
| 1617 | r=intr(gv(RC_INT));
|
---|
| 1618 | vswap();
|
---|
| 1619 | opc|=r;
|
---|
| 1620 | if ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
| 1621 | fr=intr(vtop[-1].r=get_reg_ex(RC_INT,regmask(vtop[-1].r)));
|
---|
| 1622 | c = vtop->c.i & 0x1f;
|
---|
| 1623 | o(opc|(c<<7)|(fr<<12));
|
---|
| 1624 | } else {
|
---|
| 1625 | fr=intr(gv(RC_INT));
|
---|
| 1626 | c=intr(vtop[-1].r=get_reg_ex(RC_INT,two2mask(vtop->r,vtop[-1].r)));
|
---|
| 1627 | o(opc|(c<<12)|(fr<<8)|0x10);
|
---|
| 1628 | }
|
---|
| 1629 | vtop--;
|
---|
| 1630 | break;
|
---|
| 1631 | case 3:
|
---|
| 1632 | vpush_global_sym(&func_old_type, func);
|
---|
| 1633 | vrott(3);
|
---|
| 1634 | gfunc_call(2);
|
---|
| 1635 | vpushi(0);
|
---|
| 1636 | vtop->r = retreg;
|
---|
| 1637 | break;
|
---|
| 1638 | default:
|
---|
| 1639 | tcc_error("gen_opi %i unimplemented!",op);
|
---|
| 1640 | }
|
---|
| 1641 | }
|
---|
| 1642 |
|
---|
| 1643 | #ifdef TCC_ARM_VFP
|
---|
| 1644 | static int is_zero(int i)
|
---|
| 1645 | {
|
---|
| 1646 | if((vtop[i].r & (VT_VALMASK | VT_LVAL | VT_SYM)) != VT_CONST)
|
---|
| 1647 | return 0;
|
---|
| 1648 | if (vtop[i].type.t == VT_FLOAT)
|
---|
| 1649 | return (vtop[i].c.f == 0.f);
|
---|
| 1650 | else if (vtop[i].type.t == VT_DOUBLE)
|
---|
| 1651 | return (vtop[i].c.d == 0.0);
|
---|
| 1652 | return (vtop[i].c.ld == 0.l);
|
---|
| 1653 | }
|
---|
| 1654 |
|
---|
| 1655 | /* generate a floating point operation 'v = t1 op t2' instruction. The
|
---|
[331] | 1656 | * two operands are guaranteed to have the same floating point type */
|
---|
[279] | 1657 | void gen_opf(int op)
|
---|
| 1658 | {
|
---|
| 1659 | uint32_t x;
|
---|
| 1660 | int fneg=0,r;
|
---|
| 1661 | x=0xEE000A00|T2CPR(vtop->type.t);
|
---|
| 1662 | switch(op) {
|
---|
| 1663 | case '+':
|
---|
| 1664 | if(is_zero(-1))
|
---|
| 1665 | vswap();
|
---|
| 1666 | if(is_zero(0)) {
|
---|
| 1667 | vtop--;
|
---|
| 1668 | return;
|
---|
| 1669 | }
|
---|
| 1670 | x|=0x300000;
|
---|
| 1671 | break;
|
---|
| 1672 | case '-':
|
---|
| 1673 | x|=0x300040;
|
---|
| 1674 | if(is_zero(0)) {
|
---|
| 1675 | vtop--;
|
---|
| 1676 | return;
|
---|
| 1677 | }
|
---|
| 1678 | if(is_zero(-1)) {
|
---|
| 1679 | x|=0x810000; /* fsubX -> fnegX */
|
---|
| 1680 | vswap();
|
---|
| 1681 | vtop--;
|
---|
| 1682 | fneg=1;
|
---|
| 1683 | }
|
---|
| 1684 | break;
|
---|
| 1685 | case '*':
|
---|
| 1686 | x|=0x200000;
|
---|
| 1687 | break;
|
---|
| 1688 | case '/':
|
---|
| 1689 | x|=0x800000;
|
---|
| 1690 | break;
|
---|
| 1691 | default:
|
---|
| 1692 | if(op < TOK_ULT || op > TOK_GT) {
|
---|
| 1693 | tcc_error("unknown fp op %x!",op);
|
---|
| 1694 | return;
|
---|
| 1695 | }
|
---|
| 1696 | if(is_zero(-1)) {
|
---|
| 1697 | vswap();
|
---|
| 1698 | switch(op) {
|
---|
| 1699 | case TOK_LT: op=TOK_GT; break;
|
---|
| 1700 | case TOK_GE: op=TOK_ULE; break;
|
---|
| 1701 | case TOK_LE: op=TOK_GE; break;
|
---|
| 1702 | case TOK_GT: op=TOK_ULT; break;
|
---|
| 1703 | }
|
---|
| 1704 | }
|
---|
| 1705 | x|=0xB40040; /* fcmpX */
|
---|
| 1706 | if(op!=TOK_EQ && op!=TOK_NE)
|
---|
| 1707 | x|=0x80; /* fcmpX -> fcmpeX */
|
---|
| 1708 | if(is_zero(0)) {
|
---|
| 1709 | vtop--;
|
---|
| 1710 | o(x|0x10000|(vfpr(gv(RC_FLOAT))<<12)); /* fcmp(e)X -> fcmp(e)zX */
|
---|
| 1711 | } else {
|
---|
| 1712 | x|=vfpr(gv(RC_FLOAT));
|
---|
| 1713 | vswap();
|
---|
| 1714 | o(x|(vfpr(gv(RC_FLOAT))<<12));
|
---|
| 1715 | vtop--;
|
---|
| 1716 | }
|
---|
| 1717 | o(0xEEF1FA10); /* fmstat */
|
---|
| 1718 |
|
---|
| 1719 | switch(op) {
|
---|
| 1720 | case TOK_LE: op=TOK_ULE; break;
|
---|
| 1721 | case TOK_LT: op=TOK_ULT; break;
|
---|
| 1722 | case TOK_UGE: op=TOK_GE; break;
|
---|
| 1723 | case TOK_UGT: op=TOK_GT; break;
|
---|
| 1724 | }
|
---|
[331] | 1725 |
|
---|
[279] | 1726 | vtop->r = VT_CMP;
|
---|
| 1727 | vtop->c.i = op;
|
---|
| 1728 | return;
|
---|
| 1729 | }
|
---|
| 1730 | r=gv(RC_FLOAT);
|
---|
| 1731 | x|=vfpr(r);
|
---|
| 1732 | r=regmask(r);
|
---|
| 1733 | if(!fneg) {
|
---|
| 1734 | int r2;
|
---|
| 1735 | vswap();
|
---|
| 1736 | r2=gv(RC_FLOAT);
|
---|
| 1737 | x|=vfpr(r2)<<16;
|
---|
| 1738 | r|=regmask(r2);
|
---|
| 1739 | }
|
---|
| 1740 | vtop->r=get_reg_ex(RC_FLOAT,r);
|
---|
| 1741 | if(!fneg)
|
---|
| 1742 | vtop--;
|
---|
| 1743 | o(x|(vfpr(vtop->r)<<12));
|
---|
| 1744 | }
|
---|
| 1745 |
|
---|
| 1746 | #else
|
---|
| 1747 | static uint32_t is_fconst()
|
---|
| 1748 | {
|
---|
| 1749 | long double f;
|
---|
| 1750 | uint32_t r;
|
---|
| 1751 | if((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) != VT_CONST)
|
---|
| 1752 | return 0;
|
---|
| 1753 | if (vtop->type.t == VT_FLOAT)
|
---|
| 1754 | f = vtop->c.f;
|
---|
| 1755 | else if (vtop->type.t == VT_DOUBLE)
|
---|
| 1756 | f = vtop->c.d;
|
---|
| 1757 | else
|
---|
| 1758 | f = vtop->c.ld;
|
---|
| 1759 | if(!ieee_finite(f))
|
---|
| 1760 | return 0;
|
---|
| 1761 | r=0x8;
|
---|
| 1762 | if(f<0.0) {
|
---|
| 1763 | r=0x18;
|
---|
| 1764 | f=-f;
|
---|
| 1765 | }
|
---|
| 1766 | if(f==0.0)
|
---|
| 1767 | return r;
|
---|
| 1768 | if(f==1.0)
|
---|
| 1769 | return r|1;
|
---|
| 1770 | if(f==2.0)
|
---|
| 1771 | return r|2;
|
---|
| 1772 | if(f==3.0)
|
---|
| 1773 | return r|3;
|
---|
| 1774 | if(f==4.0)
|
---|
| 1775 | return r|4;
|
---|
| 1776 | if(f==5.0)
|
---|
| 1777 | return r|5;
|
---|
| 1778 | if(f==0.5)
|
---|
| 1779 | return r|6;
|
---|
| 1780 | if(f==10.0)
|
---|
| 1781 | return r|7;
|
---|
| 1782 | return 0;
|
---|
| 1783 | }
|
---|
| 1784 |
|
---|
| 1785 | /* generate a floating point operation 'v = t1 op t2' instruction. The
|
---|
[331] | 1786 | two operands are guaranteed to have the same floating point type */
|
---|
[279] | 1787 | void gen_opf(int op)
|
---|
| 1788 | {
|
---|
| 1789 | uint32_t x, r, r2, c1, c2;
|
---|
| 1790 | //fputs("gen_opf\n",stderr);
|
---|
| 1791 | vswap();
|
---|
| 1792 | c1 = is_fconst();
|
---|
| 1793 | vswap();
|
---|
| 1794 | c2 = is_fconst();
|
---|
| 1795 | x=0xEE000100;
|
---|
| 1796 | #if LDOUBLE_SIZE == 8
|
---|
| 1797 | if ((vtop->type.t & VT_BTYPE) != VT_FLOAT)
|
---|
| 1798 | x|=0x80;
|
---|
| 1799 | #else
|
---|
| 1800 | if ((vtop->type.t & VT_BTYPE) == VT_DOUBLE)
|
---|
| 1801 | x|=0x80;
|
---|
| 1802 | else if ((vtop->type.t & VT_BTYPE) == VT_LDOUBLE)
|
---|
| 1803 | x|=0x80000;
|
---|
| 1804 | #endif
|
---|
| 1805 | switch(op)
|
---|
| 1806 | {
|
---|
| 1807 | case '+':
|
---|
| 1808 | if(!c2) {
|
---|
| 1809 | vswap();
|
---|
| 1810 | c2=c1;
|
---|
| 1811 | }
|
---|
| 1812 | vswap();
|
---|
| 1813 | r=fpr(gv(RC_FLOAT));
|
---|
| 1814 | vswap();
|
---|
| 1815 | if(c2) {
|
---|
| 1816 | if(c2>0xf)
|
---|
| 1817 | x|=0x200000; // suf
|
---|
| 1818 | r2=c2&0xf;
|
---|
| 1819 | } else {
|
---|
| 1820 | r2=fpr(gv(RC_FLOAT));
|
---|
| 1821 | }
|
---|
| 1822 | break;
|
---|
| 1823 | case '-':
|
---|
| 1824 | if(c2) {
|
---|
| 1825 | if(c2<=0xf)
|
---|
| 1826 | x|=0x200000; // suf
|
---|
| 1827 | r2=c2&0xf;
|
---|
| 1828 | vswap();
|
---|
| 1829 | r=fpr(gv(RC_FLOAT));
|
---|
| 1830 | vswap();
|
---|
| 1831 | } else if(c1 && c1<=0xf) {
|
---|
| 1832 | x|=0x300000; // rsf
|
---|
| 1833 | r2=c1;
|
---|
| 1834 | r=fpr(gv(RC_FLOAT));
|
---|
| 1835 | vswap();
|
---|
| 1836 | } else {
|
---|
| 1837 | x|=0x200000; // suf
|
---|
| 1838 | vswap();
|
---|
| 1839 | r=fpr(gv(RC_FLOAT));
|
---|
| 1840 | vswap();
|
---|
| 1841 | r2=fpr(gv(RC_FLOAT));
|
---|
| 1842 | }
|
---|
| 1843 | break;
|
---|
| 1844 | case '*':
|
---|
| 1845 | if(!c2 || c2>0xf) {
|
---|
| 1846 | vswap();
|
---|
| 1847 | c2=c1;
|
---|
| 1848 | }
|
---|
| 1849 | vswap();
|
---|
| 1850 | r=fpr(gv(RC_FLOAT));
|
---|
| 1851 | vswap();
|
---|
| 1852 | if(c2 && c2<=0xf)
|
---|
| 1853 | r2=c2;
|
---|
| 1854 | else
|
---|
| 1855 | r2=fpr(gv(RC_FLOAT));
|
---|
| 1856 | x|=0x100000; // muf
|
---|
| 1857 | break;
|
---|
| 1858 | case '/':
|
---|
| 1859 | if(c2 && c2<=0xf) {
|
---|
| 1860 | x|=0x400000; // dvf
|
---|
| 1861 | r2=c2;
|
---|
| 1862 | vswap();
|
---|
| 1863 | r=fpr(gv(RC_FLOAT));
|
---|
| 1864 | vswap();
|
---|
| 1865 | } else if(c1 && c1<=0xf) {
|
---|
| 1866 | x|=0x500000; // rdf
|
---|
| 1867 | r2=c1;
|
---|
| 1868 | r=fpr(gv(RC_FLOAT));
|
---|
| 1869 | vswap();
|
---|
| 1870 | } else {
|
---|
| 1871 | x|=0x400000; // dvf
|
---|
| 1872 | vswap();
|
---|
| 1873 | r=fpr(gv(RC_FLOAT));
|
---|
| 1874 | vswap();
|
---|
| 1875 | r2=fpr(gv(RC_FLOAT));
|
---|
[331] | 1876 | }
|
---|
[279] | 1877 | break;
|
---|
| 1878 | default:
|
---|
| 1879 | if(op >= TOK_ULT && op <= TOK_GT) {
|
---|
| 1880 | x|=0xd0f110; // cmfe
|
---|
| 1881 | /* bug (intention?) in Linux FPU emulator
|
---|
| 1882 | doesn't set carry if equal */
|
---|
| 1883 | switch(op) {
|
---|
| 1884 | case TOK_ULT:
|
---|
| 1885 | case TOK_UGE:
|
---|
| 1886 | case TOK_ULE:
|
---|
| 1887 | case TOK_UGT:
|
---|
[331] | 1888 | tcc_error("unsigned comparison on floats?");
|
---|
[279] | 1889 | break;
|
---|
| 1890 | case TOK_LT:
|
---|
| 1891 | op=TOK_Nset;
|
---|
| 1892 | break;
|
---|
| 1893 | case TOK_LE:
|
---|
| 1894 | op=TOK_ULE; /* correct in unordered case only if AC bit in FPSR set */
|
---|
| 1895 | break;
|
---|
| 1896 | case TOK_EQ:
|
---|
| 1897 | case TOK_NE:
|
---|
| 1898 | x&=~0x400000; // cmfe -> cmf
|
---|
| 1899 | break;
|
---|
| 1900 | }
|
---|
| 1901 | if(c1 && !c2) {
|
---|
| 1902 | c2=c1;
|
---|
| 1903 | vswap();
|
---|
| 1904 | switch(op) {
|
---|
| 1905 | case TOK_Nset:
|
---|
| 1906 | op=TOK_GT;
|
---|
| 1907 | break;
|
---|
| 1908 | case TOK_GE:
|
---|
| 1909 | op=TOK_ULE;
|
---|
| 1910 | break;
|
---|
| 1911 | case TOK_ULE:
|
---|
| 1912 | op=TOK_GE;
|
---|
| 1913 | break;
|
---|
| 1914 | case TOK_GT:
|
---|
| 1915 | op=TOK_Nset;
|
---|
| 1916 | break;
|
---|
| 1917 | }
|
---|
| 1918 | }
|
---|
| 1919 | vswap();
|
---|
| 1920 | r=fpr(gv(RC_FLOAT));
|
---|
| 1921 | vswap();
|
---|
| 1922 | if(c2) {
|
---|
| 1923 | if(c2>0xf)
|
---|
| 1924 | x|=0x200000;
|
---|
| 1925 | r2=c2&0xf;
|
---|
| 1926 | } else {
|
---|
| 1927 | r2=fpr(gv(RC_FLOAT));
|
---|
| 1928 | }
|
---|
| 1929 | vtop[-1].r = VT_CMP;
|
---|
| 1930 | vtop[-1].c.i = op;
|
---|
| 1931 | } else {
|
---|
| 1932 | tcc_error("unknown fp op %x!",op);
|
---|
| 1933 | return;
|
---|
| 1934 | }
|
---|
| 1935 | }
|
---|
| 1936 | if(vtop[-1].r == VT_CMP)
|
---|
| 1937 | c1=15;
|
---|
| 1938 | else {
|
---|
| 1939 | c1=vtop->r;
|
---|
| 1940 | if(r2&0x8)
|
---|
| 1941 | c1=vtop[-1].r;
|
---|
| 1942 | vtop[-1].r=get_reg_ex(RC_FLOAT,two2mask(vtop[-1].r,c1));
|
---|
| 1943 | c1=fpr(vtop[-1].r);
|
---|
| 1944 | }
|
---|
| 1945 | vtop--;
|
---|
| 1946 | o(x|(r<<16)|(c1<<12)|r2);
|
---|
| 1947 | }
|
---|
| 1948 | #endif
|
---|
| 1949 |
|
---|
| 1950 | /* convert integers to fp 't' type. Must handle 'int', 'unsigned int'
|
---|
| 1951 | and 'long long' cases. */
|
---|
| 1952 | ST_FUNC void gen_cvt_itof1(int t)
|
---|
| 1953 | {
|
---|
| 1954 | uint32_t r, r2;
|
---|
| 1955 | int bt;
|
---|
| 1956 | bt=vtop->type.t & VT_BTYPE;
|
---|
| 1957 | if(bt == VT_INT || bt == VT_SHORT || bt == VT_BYTE) {
|
---|
| 1958 | #ifndef TCC_ARM_VFP
|
---|
| 1959 | uint32_t dsize = 0;
|
---|
| 1960 | #endif
|
---|
| 1961 | r=intr(gv(RC_INT));
|
---|
| 1962 | #ifdef TCC_ARM_VFP
|
---|
| 1963 | r2=vfpr(vtop->r=get_reg(RC_FLOAT));
|
---|
| 1964 | o(0xEE000A10|(r<<12)|(r2<<16)); /* fmsr */
|
---|
| 1965 | r2|=r2<<12;
|
---|
| 1966 | if(!(vtop->type.t & VT_UNSIGNED))
|
---|
| 1967 | r2|=0x80; /* fuitoX -> fsituX */
|
---|
| 1968 | o(0xEEB80A40|r2|T2CPR(t)); /* fYitoX*/
|
---|
| 1969 | #else
|
---|
| 1970 | r2=fpr(vtop->r=get_reg(RC_FLOAT));
|
---|
| 1971 | if((t & VT_BTYPE) != VT_FLOAT)
|
---|
| 1972 | dsize=0x80; /* flts -> fltd */
|
---|
| 1973 | o(0xEE000110|dsize|(r2<<16)|(r<<12)); /* flts */
|
---|
| 1974 | if((vtop->type.t & (VT_UNSIGNED|VT_BTYPE)) == (VT_UNSIGNED|VT_INT)) {
|
---|
| 1975 | uint32_t off = 0;
|
---|
| 1976 | o(0xE3500000|(r<<12)); /* cmp */
|
---|
| 1977 | r=fpr(get_reg(RC_FLOAT));
|
---|
| 1978 | if(last_itod_magic) {
|
---|
| 1979 | off=ind+8-last_itod_magic;
|
---|
| 1980 | off/=4;
|
---|
| 1981 | if(off>255)
|
---|
| 1982 | off=0;
|
---|
| 1983 | }
|
---|
| 1984 | o(0xBD1F0100|(r<<12)|off); /* ldflts */
|
---|
| 1985 | if(!off) {
|
---|
| 1986 | o(0xEA000000); /* b */
|
---|
| 1987 | last_itod_magic=ind;
|
---|
| 1988 | o(0x4F800000); /* 4294967296.0f */
|
---|
| 1989 | }
|
---|
| 1990 | o(0xBE000100|dsize|(r2<<16)|(r2<<12)|r); /* adflt */
|
---|
| 1991 | }
|
---|
| 1992 | #endif
|
---|
| 1993 | return;
|
---|
| 1994 | } else if(bt == VT_LLONG) {
|
---|
| 1995 | int func;
|
---|
| 1996 | CType *func_type = 0;
|
---|
| 1997 | if((t & VT_BTYPE) == VT_FLOAT) {
|
---|
| 1998 | func_type = &func_float_type;
|
---|
| 1999 | if(vtop->type.t & VT_UNSIGNED)
|
---|
| 2000 | func=TOK___floatundisf;
|
---|
| 2001 | else
|
---|
| 2002 | func=TOK___floatdisf;
|
---|
| 2003 | #if LDOUBLE_SIZE != 8
|
---|
| 2004 | } else if((t & VT_BTYPE) == VT_LDOUBLE) {
|
---|
| 2005 | func_type = &func_ldouble_type;
|
---|
| 2006 | if(vtop->type.t & VT_UNSIGNED)
|
---|
| 2007 | func=TOK___floatundixf;
|
---|
| 2008 | else
|
---|
| 2009 | func=TOK___floatdixf;
|
---|
| 2010 | } else if((t & VT_BTYPE) == VT_DOUBLE) {
|
---|
| 2011 | #else
|
---|
| 2012 | } else if((t & VT_BTYPE) == VT_DOUBLE || (t & VT_BTYPE) == VT_LDOUBLE) {
|
---|
| 2013 | #endif
|
---|
| 2014 | func_type = &func_double_type;
|
---|
| 2015 | if(vtop->type.t & VT_UNSIGNED)
|
---|
| 2016 | func=TOK___floatundidf;
|
---|
| 2017 | else
|
---|
| 2018 | func=TOK___floatdidf;
|
---|
| 2019 | }
|
---|
| 2020 | if(func_type) {
|
---|
| 2021 | vpush_global_sym(func_type, func);
|
---|
| 2022 | vswap();
|
---|
| 2023 | gfunc_call(1);
|
---|
| 2024 | vpushi(0);
|
---|
| 2025 | vtop->r=TREG_F0;
|
---|
| 2026 | return;
|
---|
| 2027 | }
|
---|
| 2028 | }
|
---|
| 2029 | tcc_error("unimplemented gen_cvt_itof %x!",vtop->type.t);
|
---|
| 2030 | }
|
---|
| 2031 |
|
---|
| 2032 | /* convert fp to int 't' type */
|
---|
| 2033 | void gen_cvt_ftoi(int t)
|
---|
| 2034 | {
|
---|
| 2035 | uint32_t r, r2;
|
---|
| 2036 | int u, func = 0;
|
---|
| 2037 | u=t&VT_UNSIGNED;
|
---|
| 2038 | t&=VT_BTYPE;
|
---|
| 2039 | r2=vtop->type.t & VT_BTYPE;
|
---|
| 2040 | if(t==VT_INT) {
|
---|
| 2041 | #ifdef TCC_ARM_VFP
|
---|
| 2042 | r=vfpr(gv(RC_FLOAT));
|
---|
| 2043 | u=u?0:0x10000;
|
---|
| 2044 | o(0xEEBC0AC0|(r<<12)|r|T2CPR(r2)|u); /* ftoXizY */
|
---|
| 2045 | r2=intr(vtop->r=get_reg(RC_INT));
|
---|
| 2046 | o(0xEE100A10|(r<<16)|(r2<<12));
|
---|
| 2047 | return;
|
---|
| 2048 | #else
|
---|
| 2049 | if(u) {
|
---|
| 2050 | if(r2 == VT_FLOAT)
|
---|
| 2051 | func=TOK___fixunssfsi;
|
---|
| 2052 | #if LDOUBLE_SIZE != 8
|
---|
| 2053 | else if(r2 == VT_LDOUBLE)
|
---|
| 2054 | func=TOK___fixunsxfsi;
|
---|
| 2055 | else if(r2 == VT_DOUBLE)
|
---|
| 2056 | #else
|
---|
| 2057 | else if(r2 == VT_LDOUBLE || r2 == VT_DOUBLE)
|
---|
| 2058 | #endif
|
---|
| 2059 | func=TOK___fixunsdfsi;
|
---|
| 2060 | } else {
|
---|
| 2061 | r=fpr(gv(RC_FLOAT));
|
---|
| 2062 | r2=intr(vtop->r=get_reg(RC_INT));
|
---|
| 2063 | o(0xEE100170|(r2<<12)|r);
|
---|
| 2064 | return;
|
---|
| 2065 | }
|
---|
| 2066 | #endif
|
---|
| 2067 | } else if(t == VT_LLONG) { // unsigned handled in gen_cvt_ftoi1
|
---|
| 2068 | if(r2 == VT_FLOAT)
|
---|
| 2069 | func=TOK___fixsfdi;
|
---|
| 2070 | #if LDOUBLE_SIZE != 8
|
---|
| 2071 | else if(r2 == VT_LDOUBLE)
|
---|
| 2072 | func=TOK___fixxfdi;
|
---|
| 2073 | else if(r2 == VT_DOUBLE)
|
---|
| 2074 | #else
|
---|
| 2075 | else if(r2 == VT_LDOUBLE || r2 == VT_DOUBLE)
|
---|
| 2076 | #endif
|
---|
| 2077 | func=TOK___fixdfdi;
|
---|
| 2078 | }
|
---|
| 2079 | if(func) {
|
---|
| 2080 | vpush_global_sym(&func_old_type, func);
|
---|
| 2081 | vswap();
|
---|
| 2082 | gfunc_call(1);
|
---|
| 2083 | vpushi(0);
|
---|
| 2084 | if(t == VT_LLONG)
|
---|
| 2085 | vtop->r2 = REG_LRET;
|
---|
| 2086 | vtop->r = REG_IRET;
|
---|
| 2087 | return;
|
---|
| 2088 | }
|
---|
| 2089 | tcc_error("unimplemented gen_cvt_ftoi!");
|
---|
| 2090 | }
|
---|
| 2091 |
|
---|
| 2092 | /* convert from one floating point type to another */
|
---|
| 2093 | void gen_cvt_ftof(int t)
|
---|
| 2094 | {
|
---|
| 2095 | #ifdef TCC_ARM_VFP
|
---|
| 2096 | if(((vtop->type.t & VT_BTYPE) == VT_FLOAT) != ((t & VT_BTYPE) == VT_FLOAT)) {
|
---|
| 2097 | uint32_t r = vfpr(gv(RC_FLOAT));
|
---|
| 2098 | o(0xEEB70AC0|(r<<12)|r|T2CPR(vtop->type.t));
|
---|
| 2099 | }
|
---|
| 2100 | #else
|
---|
| 2101 | /* all we have to do on i386 and FPA ARM is to put the float in a register */
|
---|
| 2102 | gv(RC_FLOAT);
|
---|
| 2103 | #endif
|
---|
| 2104 | }
|
---|
| 2105 |
|
---|
| 2106 | /* computed goto support */
|
---|
| 2107 | void ggoto(void)
|
---|
| 2108 | {
|
---|
| 2109 | gcall_or_jmp(1);
|
---|
| 2110 | vtop--;
|
---|
| 2111 | }
|
---|
| 2112 |
|
---|
[331] | 2113 | /* Save the stack pointer onto the stack and return the location of its address */
|
---|
| 2114 | ST_FUNC void gen_vla_sp_save(int addr) {
|
---|
| 2115 | SValue v;
|
---|
| 2116 | v.type.t = VT_PTR;
|
---|
| 2117 | v.r = VT_LOCAL | VT_LVAL;
|
---|
| 2118 | v.c.i = addr;
|
---|
| 2119 | store(TREG_SP, &v);
|
---|
| 2120 | }
|
---|
| 2121 |
|
---|
| 2122 | /* Restore the SP from a location on the stack */
|
---|
| 2123 | ST_FUNC void gen_vla_sp_restore(int addr) {
|
---|
| 2124 | SValue v;
|
---|
| 2125 | v.type.t = VT_PTR;
|
---|
| 2126 | v.r = VT_LOCAL | VT_LVAL;
|
---|
| 2127 | v.c.i = addr;
|
---|
| 2128 | load(TREG_SP, &v);
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
| 2131 | /* Subtract from the stack pointer, and push the resulting value onto the stack */
|
---|
| 2132 | ST_FUNC void gen_vla_alloc(CType *type, int align) {
|
---|
| 2133 | int r = intr(gv(RC_INT));
|
---|
| 2134 | o(0xE04D0000|(r<<12)|r); /* sub r, sp, r */
|
---|
| 2135 | #ifdef TCC_ARM_EABI
|
---|
| 2136 | if (align < 8)
|
---|
| 2137 | align = 8;
|
---|
| 2138 | #else
|
---|
| 2139 | if (align < 4)
|
---|
| 2140 | align = 4;
|
---|
| 2141 | #endif
|
---|
| 2142 | if (align & (align - 1))
|
---|
| 2143 | tcc_error("alignment is not a power of 2: %i", align);
|
---|
| 2144 | o(stuff_const(0xE3C0D000|(r<<16), align - 1)); /* bic sp, r, #align-1 */
|
---|
| 2145 | vpop();
|
---|
| 2146 | }
|
---|
| 2147 |
|
---|
[279] | 2148 | /* end of ARM code generator */
|
---|
| 2149 | /*************************************************************/
|
---|
| 2150 | #endif
|
---|
| 2151 | /*************************************************************/
|
---|