1 | /*
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2 | * ARMv4 code generator for TCC
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3 | *
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4 | * Copyright (c) 2003 Daniel Glöckner
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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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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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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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37 | #ifndef TCC_CPU_VERSION
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38 | # define TCC_CPU_VERSION 5
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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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47 | #define RC_R1 0x0008
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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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82 | TREG_SP = 13,
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83 | TREG_LR,
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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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107 | /* #define FUNC_STRUCT_PARAM_AS_PTR */
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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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137 | enum float_abi float_abi;
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138 |
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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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162 | ST_FUNC void arm_init(struct TCCState *s)
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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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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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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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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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186 | #endif
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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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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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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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207 | {
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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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217 | /* this is a good place to start adding big-endian support*/
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218 | int ind1;
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219 | if (nocode_wanted)
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220 | return;
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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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230 | i>>=8;
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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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346 | uint32_t encbranch(int pos, int addr, int fail)
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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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395 | return r - TREG_F0;
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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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402 | return r - TREG_F0;
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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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408 | if(r == TREG_R12)
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409 | return 12;
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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);
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415 | }
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416 |
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417 | static void calcaddr(uint32_t *base, int *off, int *sgn, int maxoff, unsigned shift)
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418 | {
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419 | if(*off>maxoff || *off&((1<<shift)-1)) {
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420 | uint32_t x, y;
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421 | x=0xE280E000;
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422 | if(*sgn)
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423 | x=0xE240E000;
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424 | x|=(*base)<<16;
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425 | *base=14; // lr
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426 | y=stuff_const(x,*off&~maxoff);
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427 | if(y) {
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428 | o(y);
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429 | *off&=maxoff;
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430 | return;
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431 | }
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432 | y=stuff_const(x,(*off+maxoff)&~maxoff);
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433 | if(y) {
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434 | o(y);
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435 | *sgn=!*sgn;
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436 | *off=((*off+maxoff)&~maxoff)-*off;
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437 | return;
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438 | }
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439 | stuff_const_harder(x,*off&~maxoff);
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440 | *off&=maxoff;
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441 | }
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442 | }
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443 |
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444 | static uint32_t mapcc(int cc)
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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;
|
---|
519 | fc = sv->c.i;
|
---|
520 |
|
---|
521 | if(fc>=0)
|
---|
522 | sign=0;
|
---|
523 | else {
|
---|
524 | sign=1;
|
---|
525 | fc=-fc;
|
---|
526 | }
|
---|
527 |
|
---|
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;
|
---|
534 | v1.c.i = sv->c.i;
|
---|
535 | load(TREG_LR, &v1);
|
---|
536 | base = 14; /* lr */
|
---|
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;
|
---|
542 | v1.c.i = sv->c.i;
|
---|
543 | v1.sym=sv->sym;
|
---|
544 | load(TREG_LR, &v1);
|
---|
545 | base = 14; /* lr */
|
---|
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;
|
---|
594 | if ((ft & VT_BTYPE) == VT_BYTE || (ft & VT_BTYPE) == VT_BOOL)
|
---|
595 | op|=0x400000;
|
---|
596 | o(op|(intr(r)<<12)|fc|(base<<16));
|
---|
597 | }
|
---|
598 | return;
|
---|
599 | }
|
---|
600 | } else {
|
---|
601 | if (v == VT_CONST) {
|
---|
602 | op=stuff_const(0xE3A00000|(intr(r)<<12),sv->c.i);
|
---|
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);
|
---|
608 | o(sv->c.i);
|
---|
609 | } else
|
---|
610 | o(op);
|
---|
611 | return;
|
---|
612 | } else if (v == VT_LOCAL) {
|
---|
613 | op=stuff_const(0xE28B0000|(intr(r)<<12),sv->c.i);
|
---|
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);
|
---|
619 | o(sv->c.i);
|
---|
620 | o(0xE08B0000|(intr(r)<<12)|intr(r));
|
---|
621 | } else
|
---|
622 | o(op);
|
---|
623 | return;
|
---|
624 | } else if(v == VT_CMP) {
|
---|
625 | o(mapcc(sv->c.i)|0x3A00001|(intr(r)<<12));
|
---|
626 | o(mapcc(negcc(sv->c.i))|0x3A00000|(intr(r)<<12));
|
---|
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);
|
---|
633 | gsym(sv->c.i);
|
---|
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;
|
---|
660 | fc = sv->c.i;
|
---|
661 |
|
---|
662 | if(fc>=0)
|
---|
663 | sign=0;
|
---|
664 | else {
|
---|
665 | sign=1;
|
---|
666 | fc=-fc;
|
---|
667 | }
|
---|
668 |
|
---|
669 | v = fr & VT_VALMASK;
|
---|
670 | if (fr & VT_LVAL || fr == VT_LOCAL) {
|
---|
671 | uint32_t base = 0xb; /* fp */
|
---|
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;
|
---|
679 | v1.c.i = sv->c.i;
|
---|
680 | v1.sym=sv->sym;
|
---|
681 | load(TREG_LR, &v1);
|
---|
682 | base = 14; /* lr */
|
---|
683 | fc=sign=0;
|
---|
684 | v=VT_LOCAL;
|
---|
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 */
|
---|
691 | if(!sign)
|
---|
692 | op|=0x800000;
|
---|
693 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
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;
|
---|
723 | if ((ft & VT_BTYPE) == VT_BYTE || (ft & VT_BTYPE) == VT_BOOL)
|
---|
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 */
|
---|
745 | x=encbranch(ind,ind+vtop->c.i,0);
|
---|
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);
|
---|
759 | o(vtop->c.i);
|
---|
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 |
|
---|
770 | static int unalias_ldbl(int btype)
|
---|
771 | {
|
---|
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 | {
|
---|
786 | if ((type->t & VT_BTYPE) == VT_STRUCT) {
|
---|
787 | struct Sym *ref;
|
---|
788 | int btype, nb_fields = 0;
|
---|
789 |
|
---|
790 | ref = type->ref->next;
|
---|
791 | btype = unalias_ldbl(ref->type.t & VT_BTYPE);
|
---|
792 | if (btype == VT_FLOAT || btype == VT_DOUBLE) {
|
---|
793 | for(; ref && btype == unalias_ldbl(ref->type.t & VT_BTYPE); ref = ref->next, nb_fields++);
|
---|
794 | return !ref && nb_fields <= 4;
|
---|
795 | }
|
---|
796 | }
|
---|
797 | return 0;
|
---|
798 | }
|
---|
799 |
|
---|
800 | struct avail_regs {
|
---|
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 */
|
---|
805 | };
|
---|
806 |
|
---|
807 | #define AVAIL_REGS_INITIALIZER (struct avail_regs) { { 0, 0, 0}, 0, 0, 0 }
|
---|
808 |
|
---|
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)
|
---|
819 | {
|
---|
820 | int first_reg = 0;
|
---|
821 |
|
---|
822 | if (avregs->first_free_reg == -1)
|
---|
823 | return -1;
|
---|
824 | if (align >> 3) { /* double alignment */
|
---|
825 | first_reg = avregs->first_free_reg;
|
---|
826 | /* alignment constraint not respected so use next reg and record hole */
|
---|
827 | if (first_reg & 1)
|
---|
828 | avregs->avail[avregs->last_hole++] = first_reg++;
|
---|
829 | } else { /* no special alignment (float or array of float) */
|
---|
830 | /* if single float and a hole is available, assign the param to it */
|
---|
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 |
|
---|
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)
|
---|
847 | {
|
---|
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:
|
---|
858 | #endif
|
---|
859 | case TOK___floatdisf:
|
---|
860 | case TOK___floatdidf:
|
---|
861 | case TOK___fixsfdi:
|
---|
862 | case TOK___fixdfdi:
|
---|
863 | return 1;
|
---|
864 |
|
---|
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) {
|
---|
873 | #ifdef TCC_ARM_EABI
|
---|
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;
|
---|
893 | #endif
|
---|
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));
|
---|
962 | for(i = nb_args; i-- ;) {
|
---|
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;
|
---|
969 | switch(vtop[-i].type.t & VT_BTYPE) {
|
---|
970 | case VT_STRUCT:
|
---|
971 | case VT_FLOAT:
|
---|
972 | case VT_DOUBLE:
|
---|
973 | case VT_LDOUBLE:
|
---|
974 | if (float_abi == ARM_HARD_FLOAT) {
|
---|
975 | int is_hfa = 0; /* Homogeneous float aggregate */
|
---|
976 |
|
---|
977 | if (is_float(vtop[-i].type.t)
|
---|
978 | || (is_hfa = is_hgen_float_aggr(&vtop[-i].type))) {
|
---|
979 | int end_vfpreg;
|
---|
980 |
|
---|
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);
|
---|
989 | continue;
|
---|
990 | } else
|
---|
991 | break;
|
---|
992 | }
|
---|
993 | }
|
---|
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. */
|
---|
999 | for (j = ncrn; j < 4 && j < ncrn + size / 4; j++)
|
---|
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 {
|
---|
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;
|
---|
1017 | if (ncrn == 4)
|
---|
1018 | break;
|
---|
1019 | }
|
---|
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);
|
---|
1025 | continue;
|
---|
1026 | }
|
---|
1027 | }
|
---|
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 */
|
---|
1032 | }
|
---|
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))
|
---|
1073 | continue;
|
---|
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)) {
|
---|
1111 | #ifdef TCC_ARM_VFP
|
---|
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 */
|
---|
1120 | #else
|
---|
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;
|
---|
1128 |
|
---|
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 */
|
---|
1135 | #endif
|
---|
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 | }
|
---|
1176 | vtop--;
|
---|
1177 | }
|
---|
1178 | }
|
---|
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 | }
|
---|
1205 | }
|
---|
1206 | }
|
---|
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;
|
---|
1227 | }
|
---|
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);
|
---|
1235 |
|
---|
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 */
|
---|
1242 | }
|
---|
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);
|
---|
1250 | gcall_or_jmp(0);
|
---|
1251 | if (args_size)
|
---|
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)) {
|
---|
1255 | if((vtop->type.ref->type.t & VT_BTYPE) == VT_FLOAT) {
|
---|
1256 | o(0xEE000A10); /*vmov s0, r0 */
|
---|
1257 | } else {
|
---|
1258 | o(0xEE000B10); /* vmov.32 d0[0], r0 */
|
---|
1259 | o(0xEE201B10); /* vmov.32 d0[1], r1 */
|
---|
1260 | }
|
---|
1261 | }
|
---|
1262 | #endif
|
---|
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;
|
---|
1266 | }
|
---|
1267 |
|
---|
1268 | /* generate function prolog of type 't' */
|
---|
1269 | void gfunc_prolog(CType *func_type)
|
---|
1270 | {
|
---|
1271 | Sym *sym,*sym2;
|
---|
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
|
---|
1277 | struct avail_regs avregs = AVAIL_REGS_INITIALIZER;
|
---|
1278 | #endif
|
---|
1279 |
|
---|
1280 | sym = func_type->ref;
|
---|
1281 | func_vt = sym->type;
|
---|
1282 | func_var = (func_type->ref->f.func_type == FUNC_ELLIPSIS);
|
---|
1283 |
|
---|
1284 | n = nf = 0;
|
---|
1285 | if ((func_vt.t & VT_BTYPE) == VT_STRUCT &&
|
---|
1286 | !gfunc_sret(&func_vt, func_var, &ret_type, &align, &rs))
|
---|
1287 | {
|
---|
1288 | n++;
|
---|
1289 | struct_ret = 1;
|
---|
1290 | func_vc = 12; /* Offset from fp of the place to store the result */
|
---|
1291 | }
|
---|
1292 | for(sym2 = sym->next; sym2 && (n < 4 || nf < 16); sym2 = sym2->next) {
|
---|
1293 | size = type_size(&sym2->type, &align);
|
---|
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;
|
---|
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 */
|
---|
1306 | if (func_var)
|
---|
1307 | n=4;
|
---|
1308 | if (n) {
|
---|
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;
|
---|
1325 | o(0xE1A00000); /* nop, leave space for stack adjustment in epilog */
|
---|
1326 |
|
---|
1327 | #ifdef TCC_ARM_EABI
|
---|
1328 | if (float_abi == ARM_HARD_FLOAT) {
|
---|
1329 | func_vc += nf * 4;
|
---|
1330 | avregs = AVAIL_REGS_INITIALIZER;
|
---|
1331 | }
|
---|
1332 | #endif
|
---|
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
|
---|
1349 | #endif
|
---|
1350 | if (pn < 4) {
|
---|
1351 | #ifdef TCC_ARM_EABI
|
---|
1352 | pn = (pn + (align-1)/4) & -(align/4);
|
---|
1353 | #endif
|
---|
1354 | addr = (nf + pn) * 4;
|
---|
1355 | pn += size;
|
---|
1356 | if (!sn && pn > 4)
|
---|
1357 | sn = (pn - 4);
|
---|
1358 | } else {
|
---|
1359 | #ifdef TCC_ARM_EABI
|
---|
1360 | from_stack:
|
---|
1361 | sn = (sn + (align-1)/4) & -(align/4);
|
---|
1362 | #endif
|
---|
1363 | addr = (n + nf + sn) * 4;
|
---|
1364 | sn += size;
|
---|
1365 | }
|
---|
1366 | sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | lvalue_type(type->t),
|
---|
1367 | addr + 12);
|
---|
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;
|
---|
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)) {
|
---|
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;
|
---|
1417 | if (nocode_wanted)
|
---|
1418 | return t;
|
---|
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;
|
---|
1435 |
|
---|
1436 | v = vtop->r & VT_VALMASK;
|
---|
1437 | r=ind;
|
---|
1438 |
|
---|
1439 | if (nocode_wanted) {
|
---|
1440 | ;
|
---|
1441 | } else if (v == VT_CMP) {
|
---|
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
|
---|
1656 | * two operands are guaranteed to have the same floating point type */
|
---|
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 | }
|
---|
1725 |
|
---|
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
|
---|
1786 | two operands are guaranteed to have the same floating point type */
|
---|
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));
|
---|
1876 | }
|
---|
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:
|
---|
1888 | tcc_error("unsigned comparison on floats?");
|
---|
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 |
|
---|
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 |
|
---|
2148 | /* end of ARM code generator */
|
---|
2149 | /*************************************************************/
|
---|
2150 | #endif
|
---|
2151 | /*************************************************************/
|
---|