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 | #ifdef TCC_ARM_EABI
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27 | #ifndef TCC_ARM_VFP // Avoid useless warning
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28 | #define TCC_ARM_VFP
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29 | #endif
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30 | #endif
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31 |
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32 | /* number of available registers */
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33 | #ifdef TCC_ARM_VFP
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34 | #define NB_REGS 13
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35 | #else
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36 | #define NB_REGS 9
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37 | #endif
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38 |
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39 | #ifndef TCC_ARM_VERSION
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40 | # define TCC_ARM_VERSION 5
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41 | #endif
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42 |
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43 | /* a register can belong to several classes. The classes must be
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44 | sorted from more general to more precise (see gv2() code which does
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45 | assumptions on it). */
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46 | #define RC_INT 0x0001 /* generic integer register */
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47 | #define RC_FLOAT 0x0002 /* generic float register */
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48 | #define RC_R0 0x0004
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49 | #define RC_R1 0x0008
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50 | #define RC_R2 0x0010
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51 | #define RC_R3 0x0020
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52 | #define RC_R12 0x0040
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53 | #define RC_F0 0x0080
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54 | #define RC_F1 0x0100
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55 | #define RC_F2 0x0200
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56 | #define RC_F3 0x0400
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57 | #ifdef TCC_ARM_VFP
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58 | #define RC_F4 0x0800
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59 | #define RC_F5 0x1000
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60 | #define RC_F6 0x2000
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61 | #define RC_F7 0x4000
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62 | #endif
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63 | #define RC_IRET RC_R0 /* function return: integer register */
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64 | #define RC_LRET RC_R1 /* function return: second integer register */
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65 | #define RC_FRET RC_F0 /* function return: float register */
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66 |
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67 | /* pretty names for the registers */
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68 | enum {
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69 | TREG_R0 = 0,
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70 | TREG_R1,
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71 | TREG_R2,
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72 | TREG_R3,
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73 | TREG_R12,
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74 | TREG_F0,
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75 | TREG_F1,
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76 | TREG_F2,
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77 | TREG_F3,
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78 | #ifdef TCC_ARM_VFP
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79 | TREG_F4,
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80 | TREG_F5,
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81 | TREG_F6,
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82 | TREG_F7,
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83 | #endif
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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 | /* ELF defines */
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134 |
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135 | #define EM_TCC_TARGET EM_ARM
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136 |
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137 | /* relocation type for 32 bit data relocation */
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138 | #define R_DATA_32 R_ARM_ABS32
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139 | #define R_DATA_PTR R_ARM_ABS32
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140 | #define R_JMP_SLOT R_ARM_JUMP_SLOT
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141 | #define R_COPY R_ARM_COPY
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142 |
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143 | #define ELF_START_ADDR 0x00008000
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144 | #define ELF_PAGE_SIZE 0x1000
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145 |
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146 | /******************************************************/
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147 | #else /* ! TARGET_DEFS_ONLY */
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148 | /******************************************************/
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149 | #include "tcc.h"
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150 |
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151 | ST_DATA const int reg_classes[NB_REGS] = {
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152 | /* r0 */ RC_INT | RC_R0,
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153 | /* r1 */ RC_INT | RC_R1,
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154 | /* r2 */ RC_INT | RC_R2,
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155 | /* r3 */ RC_INT | RC_R3,
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156 | /* r12 */ RC_INT | RC_R12,
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157 | /* f0 */ RC_FLOAT | RC_F0,
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158 | /* f1 */ RC_FLOAT | RC_F1,
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159 | /* f2 */ RC_FLOAT | RC_F2,
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160 | /* f3 */ RC_FLOAT | RC_F3,
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161 | #ifdef TCC_ARM_VFP
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162 | /* d4/s8 */ RC_FLOAT | RC_F4,
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163 | /* d5/s10 */ RC_FLOAT | RC_F5,
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164 | /* d6/s12 */ RC_FLOAT | RC_F6,
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165 | /* d7/s14 */ RC_FLOAT | RC_F7,
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166 | #endif
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167 | };
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168 |
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169 | static int func_sub_sp_offset, last_itod_magic;
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170 | static int leaffunc;
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171 |
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172 | #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
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173 | static CType float_type, double_type, func_float_type, func_double_type;
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174 | ST_FUNC void arm_init_types(void)
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175 | {
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176 | float_type.t = VT_FLOAT;
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177 | double_type.t = VT_DOUBLE;
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178 | func_float_type.t = VT_FUNC;
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179 | func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
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180 | func_double_type.t = VT_FUNC;
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181 | func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
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182 | }
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183 | #else
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184 | #define func_float_type func_old_type
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185 | #define func_double_type func_old_type
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186 | #define func_ldouble_type func_old_type
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187 | ST_FUNC void arm_init_types(void) {}
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188 | #endif
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189 |
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190 | static int two2mask(int a,int b) {
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191 | return (reg_classes[a]|reg_classes[b])&~(RC_INT|RC_FLOAT);
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192 | }
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193 |
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194 | static int regmask(int r) {
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195 | return reg_classes[r]&~(RC_INT|RC_FLOAT);
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196 | }
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197 |
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198 | /******************************************************/
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199 |
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200 | void o(unsigned int i)
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201 | {
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202 | /* this is a good place to start adding big-endian support*/
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203 | int ind1;
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204 |
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205 | ind1 = ind + 4;
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206 | if (!cur_text_section)
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207 | tcc_error("compiler error! This happens f.ex. if the compiler\n"
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208 | "can't evaluate constant expressions outside of a function.");
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209 | if (ind1 > cur_text_section->data_allocated)
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210 | section_realloc(cur_text_section, ind1);
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211 | cur_text_section->data[ind++] = i&255;
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212 | i>>=8;
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213 | cur_text_section->data[ind++] = i&255;
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214 | i>>=8;
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215 | cur_text_section->data[ind++] = i&255;
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216 | i>>=8;
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217 | cur_text_section->data[ind++] = i;
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218 | }
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219 |
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220 | static uint32_t stuff_const(uint32_t op, uint32_t c)
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221 | {
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222 | int try_neg=0;
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223 | uint32_t nc = 0, negop = 0;
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224 |
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225 | switch(op&0x1F00000)
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226 | {
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227 | case 0x800000: //add
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228 | case 0x400000: //sub
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229 | try_neg=1;
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230 | negop=op^0xC00000;
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231 | nc=-c;
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232 | break;
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233 | case 0x1A00000: //mov
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234 | case 0x1E00000: //mvn
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235 | try_neg=1;
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236 | negop=op^0x400000;
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237 | nc=~c;
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238 | break;
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239 | case 0x200000: //xor
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240 | if(c==~0)
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241 | return (op&0xF010F000)|((op>>16)&0xF)|0x1E00000;
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242 | break;
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243 | case 0x0: //and
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244 | if(c==~0)
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245 | return (op&0xF010F000)|((op>>16)&0xF)|0x1A00000;
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246 | case 0x1C00000: //bic
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247 | try_neg=1;
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248 | negop=op^0x1C00000;
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249 | nc=~c;
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250 | break;
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251 | case 0x1800000: //orr
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252 | if(c==~0)
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253 | return (op&0xFFF0FFFF)|0x1E00000;
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254 | break;
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255 | }
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256 | do {
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257 | uint32_t m;
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258 | int i;
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259 | if(c<256) /* catch undefined <<32 */
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260 | return op|c;
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261 | for(i=2;i<32;i+=2) {
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262 | m=(0xff>>i)|(0xff<<(32-i));
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263 | if(!(c&~m))
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264 | return op|(i<<7)|(c<<i)|(c>>(32-i));
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265 | }
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266 | op=negop;
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267 | c=nc;
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268 | } while(try_neg--);
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269 | return 0;
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270 | }
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271 |
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272 |
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273 | //only add,sub
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274 | void stuff_const_harder(uint32_t op, uint32_t v) {
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275 | uint32_t x;
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276 | x=stuff_const(op,v);
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277 | if(x)
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278 | o(x);
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279 | else {
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280 | uint32_t a[16], nv, no, o2, n2;
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281 | int i,j,k;
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282 | a[0]=0xff;
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283 | o2=(op&0xfff0ffff)|((op&0xf000)<<4);;
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284 | for(i=1;i<16;i++)
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285 | a[i]=(a[i-1]>>2)|(a[i-1]<<30);
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286 | for(i=0;i<12;i++)
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287 | for(j=i<4?i+12:15;j>=i+4;j--)
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288 | if((v&(a[i]|a[j]))==v) {
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289 | o(stuff_const(op,v&a[i]));
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290 | o(stuff_const(o2,v&a[j]));
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291 | return;
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292 | }
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293 | no=op^0xC00000;
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294 | n2=o2^0xC00000;
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295 | nv=-v;
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296 | for(i=0;i<12;i++)
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297 | for(j=i<4?i+12:15;j>=i+4;j--)
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298 | if((nv&(a[i]|a[j]))==nv) {
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299 | o(stuff_const(no,nv&a[i]));
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300 | o(stuff_const(n2,nv&a[j]));
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301 | return;
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302 | }
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303 | for(i=0;i<8;i++)
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304 | for(j=i+4;j<12;j++)
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305 | for(k=i<4?i+12:15;k>=j+4;k--)
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306 | if((v&(a[i]|a[j]|a[k]))==v) {
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307 | o(stuff_const(op,v&a[i]));
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308 | o(stuff_const(o2,v&a[j]));
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309 | o(stuff_const(o2,v&a[k]));
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310 | return;
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311 | }
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312 | no=op^0xC00000;
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313 | nv=-v;
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314 | for(i=0;i<8;i++)
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315 | for(j=i+4;j<12;j++)
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316 | for(k=i<4?i+12:15;k>=j+4;k--)
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317 | if((nv&(a[i]|a[j]|a[k]))==nv) {
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318 | o(stuff_const(no,nv&a[i]));
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319 | o(stuff_const(n2,nv&a[j]));
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320 | o(stuff_const(n2,nv&a[k]));
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321 | return;
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322 | }
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323 | o(stuff_const(op,v&a[0]));
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324 | o(stuff_const(o2,v&a[4]));
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325 | o(stuff_const(o2,v&a[8]));
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326 | o(stuff_const(o2,v&a[12]));
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327 | }
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328 | }
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329 |
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330 | ST_FUNC uint32_t encbranch(int pos, int addr, int fail)
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331 | {
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332 | addr-=pos+8;
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333 | addr/=4;
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334 | if(addr>=0x1000000 || addr<-0x1000000) {
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335 | if(fail)
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336 | tcc_error("FIXME: function bigger than 32MB");
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337 | return 0;
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338 | }
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339 | return 0x0A000000|(addr&0xffffff);
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340 | }
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341 |
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342 | int decbranch(int pos)
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343 | {
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344 | int x;
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345 | x=*(uint32_t *)(cur_text_section->data + pos);
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346 | x&=0x00ffffff;
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347 | if(x&0x800000)
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348 | x-=0x1000000;
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349 | return x*4+pos+8;
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350 | }
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351 |
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352 | /* output a symbol and patch all calls to it */
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353 | void gsym_addr(int t, int a)
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354 | {
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355 | uint32_t *x;
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356 | int lt;
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357 | while(t) {
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358 | x=(uint32_t *)(cur_text_section->data + t);
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359 | t=decbranch(lt=t);
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360 | if(a==lt+4)
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361 | *x=0xE1A00000; // nop
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362 | else {
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363 | *x &= 0xff000000;
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364 | *x |= encbranch(lt,a,1);
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365 | }
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366 | }
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367 | }
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368 |
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369 | void gsym(int t)
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370 | {
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371 | gsym_addr(t, ind);
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372 | }
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373 |
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374 | #ifdef TCC_ARM_VFP
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375 | static uint32_t vfpr(int r)
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376 | {
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377 | if(r<TREG_F0 || r>TREG_F7)
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378 | tcc_error("compiler error! register %i is no vfp register",r);
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379 | return r-5;
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380 | }
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381 | #else
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382 | static uint32_t fpr(int r)
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383 | {
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384 | if(r<TREG_F0 || r>TREG_F3)
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385 | tcc_error("compiler error! register %i is no fpa register",r);
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386 | return r-5;
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387 | }
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388 | #endif
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389 |
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390 | static uint32_t intr(int r)
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391 | {
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392 | if(r==4)
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393 | return 12;
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394 | if((r<0 || r>4) && r!=14)
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395 | tcc_error("compiler error! register %i is no int register",r);
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396 | return r;
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397 | }
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398 |
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399 | static void calcaddr(uint32_t *base, int *off, int *sgn, int maxoff, unsigned shift)
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400 | {
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401 | if(*off>maxoff || *off&((1<<shift)-1)) {
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402 | uint32_t x, y;
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403 | x=0xE280E000;
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404 | if(*sgn)
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405 | x=0xE240E000;
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406 | x|=(*base)<<16;
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407 | *base=14; // lr
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408 | y=stuff_const(x,*off&~maxoff);
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409 | if(y) {
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410 | o(y);
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411 | *off&=maxoff;
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412 | return;
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413 | }
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414 | y=stuff_const(x,(*off+maxoff)&~maxoff);
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415 | if(y) {
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416 | o(y);
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417 | *sgn=!*sgn;
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418 | *off=((*off+maxoff)&~maxoff)-*off;
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419 | return;
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420 | }
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421 | stuff_const_harder(x,*off&~maxoff);
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422 | *off&=maxoff;
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423 | }
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424 | }
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425 |
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426 | static uint32_t mapcc(int cc)
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427 | {
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428 | switch(cc)
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429 | {
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430 | case TOK_ULT:
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431 | return 0x30000000; /* CC/LO */
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432 | case TOK_UGE:
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433 | return 0x20000000; /* CS/HS */
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434 | case TOK_EQ:
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435 | return 0x00000000; /* EQ */
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436 | case TOK_NE:
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437 | return 0x10000000; /* NE */
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438 | case TOK_ULE:
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439 | return 0x90000000; /* LS */
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440 | case TOK_UGT:
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441 | return 0x80000000; /* HI */
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442 | case TOK_Nset:
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443 | return 0x40000000; /* MI */
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444 | case TOK_Nclear:
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445 | return 0x50000000; /* PL */
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446 | case TOK_LT:
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447 | return 0xB0000000; /* LT */
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448 | case TOK_GE:
|
---|
449 | return 0xA0000000; /* GE */
|
---|
450 | case TOK_LE:
|
---|
451 | return 0xD0000000; /* LE */
|
---|
452 | case TOK_GT:
|
---|
453 | return 0xC0000000; /* GT */
|
---|
454 | }
|
---|
455 | tcc_error("unexpected condition code");
|
---|
456 | return 0xE0000000; /* AL */
|
---|
457 | }
|
---|
458 |
|
---|
459 | static int negcc(int cc)
|
---|
460 | {
|
---|
461 | switch(cc)
|
---|
462 | {
|
---|
463 | case TOK_ULT:
|
---|
464 | return TOK_UGE;
|
---|
465 | case TOK_UGE:
|
---|
466 | return TOK_ULT;
|
---|
467 | case TOK_EQ:
|
---|
468 | return TOK_NE;
|
---|
469 | case TOK_NE:
|
---|
470 | return TOK_EQ;
|
---|
471 | case TOK_ULE:
|
---|
472 | return TOK_UGT;
|
---|
473 | case TOK_UGT:
|
---|
474 | return TOK_ULE;
|
---|
475 | case TOK_Nset:
|
---|
476 | return TOK_Nclear;
|
---|
477 | case TOK_Nclear:
|
---|
478 | return TOK_Nset;
|
---|
479 | case TOK_LT:
|
---|
480 | return TOK_GE;
|
---|
481 | case TOK_GE:
|
---|
482 | return TOK_LT;
|
---|
483 | case TOK_LE:
|
---|
484 | return TOK_GT;
|
---|
485 | case TOK_GT:
|
---|
486 | return TOK_LE;
|
---|
487 | }
|
---|
488 | tcc_error("unexpected condition code");
|
---|
489 | return TOK_NE;
|
---|
490 | }
|
---|
491 |
|
---|
492 | /* load 'r' from value 'sv' */
|
---|
493 | void load(int r, SValue *sv)
|
---|
494 | {
|
---|
495 | int v, ft, fc, fr, sign;
|
---|
496 | uint32_t op;
|
---|
497 | SValue v1;
|
---|
498 |
|
---|
499 | fr = sv->r;
|
---|
500 | ft = sv->type.t;
|
---|
501 | fc = sv->c.ul;
|
---|
502 |
|
---|
503 | if(fc>=0)
|
---|
504 | sign=0;
|
---|
505 | else {
|
---|
506 | sign=1;
|
---|
507 | fc=-fc;
|
---|
508 | }
|
---|
509 |
|
---|
510 | v = fr & VT_VALMASK;
|
---|
511 | if (fr & VT_LVAL) {
|
---|
512 | uint32_t base = 0xB; // fp
|
---|
513 | if(v == VT_LLOCAL) {
|
---|
514 | v1.type.t = VT_PTR;
|
---|
515 | v1.r = VT_LOCAL | VT_LVAL;
|
---|
516 | v1.c.ul = sv->c.ul;
|
---|
517 | load(base=14 /* lr */, &v1);
|
---|
518 | fc=sign=0;
|
---|
519 | v=VT_LOCAL;
|
---|
520 | } else if(v == VT_CONST) {
|
---|
521 | v1.type.t = VT_PTR;
|
---|
522 | v1.r = fr&~VT_LVAL;
|
---|
523 | v1.c.ul = sv->c.ul;
|
---|
524 | v1.sym=sv->sym;
|
---|
525 | load(base=14, &v1);
|
---|
526 | fc=sign=0;
|
---|
527 | v=VT_LOCAL;
|
---|
528 | } else if(v < VT_CONST) {
|
---|
529 | base=intr(v);
|
---|
530 | fc=sign=0;
|
---|
531 | v=VT_LOCAL;
|
---|
532 | }
|
---|
533 | if(v == VT_LOCAL) {
|
---|
534 | if(is_float(ft)) {
|
---|
535 | calcaddr(&base,&fc,&sign,1020,2);
|
---|
536 | #ifdef TCC_ARM_VFP
|
---|
537 | op=0xED100A00; /* flds */
|
---|
538 | if(!sign)
|
---|
539 | op|=0x800000;
|
---|
540 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
541 | op|=0x100; /* flds -> fldd */
|
---|
542 | o(op|(vfpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
543 | #else
|
---|
544 | op=0xED100100;
|
---|
545 | if(!sign)
|
---|
546 | op|=0x800000;
|
---|
547 | #if LDOUBLE_SIZE == 8
|
---|
548 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
549 | op|=0x8000;
|
---|
550 | #else
|
---|
551 | if ((ft & VT_BTYPE) == VT_DOUBLE)
|
---|
552 | op|=0x8000;
|
---|
553 | else if ((ft & VT_BTYPE) == VT_LDOUBLE)
|
---|
554 | op|=0x400000;
|
---|
555 | #endif
|
---|
556 | o(op|(fpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
557 | #endif
|
---|
558 | } else if((ft & (VT_BTYPE|VT_UNSIGNED)) == VT_BYTE
|
---|
559 | || (ft & VT_BTYPE) == VT_SHORT) {
|
---|
560 | calcaddr(&base,&fc,&sign,255,0);
|
---|
561 | op=0xE1500090;
|
---|
562 | if ((ft & VT_BTYPE) == VT_SHORT)
|
---|
563 | op|=0x20;
|
---|
564 | if ((ft & VT_UNSIGNED) == 0)
|
---|
565 | op|=0x40;
|
---|
566 | if(!sign)
|
---|
567 | op|=0x800000;
|
---|
568 | o(op|(intr(r)<<12)|(base<<16)|((fc&0xf0)<<4)|(fc&0xf));
|
---|
569 | } else {
|
---|
570 | calcaddr(&base,&fc,&sign,4095,0);
|
---|
571 | op=0xE5100000;
|
---|
572 | if(!sign)
|
---|
573 | op|=0x800000;
|
---|
574 | if ((ft & VT_BTYPE) == VT_BYTE)
|
---|
575 | op|=0x400000;
|
---|
576 | o(op|(intr(r)<<12)|fc|(base<<16));
|
---|
577 | }
|
---|
578 | return;
|
---|
579 | }
|
---|
580 | } else {
|
---|
581 | if (v == VT_CONST) {
|
---|
582 | op=stuff_const(0xE3A00000|(intr(r)<<12),sv->c.ul);
|
---|
583 | if (fr & VT_SYM || !op) {
|
---|
584 | o(0xE59F0000|(intr(r)<<12));
|
---|
585 | o(0xEA000000);
|
---|
586 | if(fr & VT_SYM)
|
---|
587 | greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
|
---|
588 | o(sv->c.ul);
|
---|
589 | } else
|
---|
590 | o(op);
|
---|
591 | return;
|
---|
592 | } else if (v == VT_LOCAL) {
|
---|
593 | op=stuff_const(0xE28B0000|(intr(r)<<12),sv->c.ul);
|
---|
594 | if (fr & VT_SYM || !op) {
|
---|
595 | o(0xE59F0000|(intr(r)<<12));
|
---|
596 | o(0xEA000000);
|
---|
597 | if(fr & VT_SYM) // needed ?
|
---|
598 | greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
|
---|
599 | o(sv->c.ul);
|
---|
600 | o(0xE08B0000|(intr(r)<<12)|intr(r));
|
---|
601 | } else
|
---|
602 | o(op);
|
---|
603 | return;
|
---|
604 | } else if(v == VT_CMP) {
|
---|
605 | o(mapcc(sv->c.ul)|0x3A00001|(intr(r)<<12));
|
---|
606 | o(mapcc(negcc(sv->c.ul))|0x3A00000|(intr(r)<<12));
|
---|
607 | return;
|
---|
608 | } else if (v == VT_JMP || v == VT_JMPI) {
|
---|
609 | int t;
|
---|
610 | t = v & 1;
|
---|
611 | o(0xE3A00000|(intr(r)<<12)|t);
|
---|
612 | o(0xEA000000);
|
---|
613 | gsym(sv->c.ul);
|
---|
614 | o(0xE3A00000|(intr(r)<<12)|(t^1));
|
---|
615 | return;
|
---|
616 | } else if (v < VT_CONST) {
|
---|
617 | if(is_float(ft))
|
---|
618 | #ifdef TCC_ARM_VFP
|
---|
619 | o(0xEEB00A40|(vfpr(r)<<12)|vfpr(v)|T2CPR(ft)); /* fcpyX */
|
---|
620 | #else
|
---|
621 | o(0xEE008180|(fpr(r)<<12)|fpr(v));
|
---|
622 | #endif
|
---|
623 | else
|
---|
624 | o(0xE1A00000|(intr(r)<<12)|intr(v));
|
---|
625 | return;
|
---|
626 | }
|
---|
627 | }
|
---|
628 | tcc_error("load unimplemented!");
|
---|
629 | }
|
---|
630 |
|
---|
631 | /* store register 'r' in lvalue 'v' */
|
---|
632 | void store(int r, SValue *sv)
|
---|
633 | {
|
---|
634 | SValue v1;
|
---|
635 | int v, ft, fc, fr, sign;
|
---|
636 | uint32_t op;
|
---|
637 |
|
---|
638 | fr = sv->r;
|
---|
639 | ft = sv->type.t;
|
---|
640 | fc = sv->c.ul;
|
---|
641 |
|
---|
642 | if(fc>=0)
|
---|
643 | sign=0;
|
---|
644 | else {
|
---|
645 | sign=1;
|
---|
646 | fc=-fc;
|
---|
647 | }
|
---|
648 |
|
---|
649 | v = fr & VT_VALMASK;
|
---|
650 | if (fr & VT_LVAL || fr == VT_LOCAL) {
|
---|
651 | uint32_t base = 0xb;
|
---|
652 | if(v < VT_CONST) {
|
---|
653 | base=intr(v);
|
---|
654 | v=VT_LOCAL;
|
---|
655 | fc=sign=0;
|
---|
656 | } else if(v == VT_CONST) {
|
---|
657 | v1.type.t = ft;
|
---|
658 | v1.r = fr&~VT_LVAL;
|
---|
659 | v1.c.ul = sv->c.ul;
|
---|
660 | v1.sym=sv->sym;
|
---|
661 | load(base=14, &v1);
|
---|
662 | fc=sign=0;
|
---|
663 | v=VT_LOCAL;
|
---|
664 | }
|
---|
665 | if(v == VT_LOCAL) {
|
---|
666 | if(is_float(ft)) {
|
---|
667 | calcaddr(&base,&fc,&sign,1020,2);
|
---|
668 | #ifdef TCC_ARM_VFP
|
---|
669 | op=0xED000A00; /* fsts */
|
---|
670 | if(!sign)
|
---|
671 | op|=0x800000;
|
---|
672 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
673 | op|=0x100; /* fsts -> fstd */
|
---|
674 | o(op|(vfpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
675 | #else
|
---|
676 | op=0xED000100;
|
---|
677 | if(!sign)
|
---|
678 | op|=0x800000;
|
---|
679 | #if LDOUBLE_SIZE == 8
|
---|
680 | if ((ft & VT_BTYPE) != VT_FLOAT)
|
---|
681 | op|=0x8000;
|
---|
682 | #else
|
---|
683 | if ((ft & VT_BTYPE) == VT_DOUBLE)
|
---|
684 | op|=0x8000;
|
---|
685 | if ((ft & VT_BTYPE) == VT_LDOUBLE)
|
---|
686 | op|=0x400000;
|
---|
687 | #endif
|
---|
688 | o(op|(fpr(r)<<12)|(fc>>2)|(base<<16));
|
---|
689 | #endif
|
---|
690 | return;
|
---|
691 | } else if((ft & VT_BTYPE) == VT_SHORT) {
|
---|
692 | calcaddr(&base,&fc,&sign,255,0);
|
---|
693 | op=0xE14000B0;
|
---|
694 | if(!sign)
|
---|
695 | op|=0x800000;
|
---|
696 | o(op|(intr(r)<<12)|(base<<16)|((fc&0xf0)<<4)|(fc&0xf));
|
---|
697 | } else {
|
---|
698 | calcaddr(&base,&fc,&sign,4095,0);
|
---|
699 | op=0xE5000000;
|
---|
700 | if(!sign)
|
---|
701 | op|=0x800000;
|
---|
702 | if ((ft & VT_BTYPE) == VT_BYTE)
|
---|
703 | op|=0x400000;
|
---|
704 | o(op|(intr(r)<<12)|fc|(base<<16));
|
---|
705 | }
|
---|
706 | return;
|
---|
707 | }
|
---|
708 | }
|
---|
709 | tcc_error("store unimplemented");
|
---|
710 | }
|
---|
711 |
|
---|
712 | static void gadd_sp(int val)
|
---|
713 | {
|
---|
714 | stuff_const_harder(0xE28DD000,val);
|
---|
715 | }
|
---|
716 |
|
---|
717 | /* 'is_jmp' is '1' if it is a jump */
|
---|
718 | static void gcall_or_jmp(int is_jmp)
|
---|
719 | {
|
---|
720 | int r;
|
---|
721 | if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
|
---|
722 | uint32_t x;
|
---|
723 | /* constant case */
|
---|
724 | x=encbranch(ind,ind+vtop->c.ul,0);
|
---|
725 | if(x) {
|
---|
726 | if (vtop->r & VT_SYM) {
|
---|
727 | /* relocation case */
|
---|
728 | greloc(cur_text_section, vtop->sym, ind, R_ARM_PC24);
|
---|
729 | } else
|
---|
730 | put_elf_reloc(symtab_section, cur_text_section, ind, R_ARM_PC24, 0);
|
---|
731 | o(x|(is_jmp?0xE0000000:0xE1000000));
|
---|
732 | } else {
|
---|
733 | if(!is_jmp)
|
---|
734 | o(0xE28FE004); // add lr,pc,#4
|
---|
735 | o(0xE51FF004); // ldr pc,[pc,#-4]
|
---|
736 | if (vtop->r & VT_SYM)
|
---|
737 | greloc(cur_text_section, vtop->sym, ind, R_ARM_ABS32);
|
---|
738 | o(vtop->c.ul);
|
---|
739 | }
|
---|
740 | } else {
|
---|
741 | /* otherwise, indirect call */
|
---|
742 | r = gv(RC_INT);
|
---|
743 | if(!is_jmp)
|
---|
744 | o(0xE1A0E00F); // mov lr,pc
|
---|
745 | o(0xE1A0F000|intr(r)); // mov pc,r
|
---|
746 | }
|
---|
747 | }
|
---|
748 |
|
---|
749 | #ifdef TCC_ARM_HARDFLOAT
|
---|
750 | static int is_float_hgen_aggr(CType *type)
|
---|
751 | {
|
---|
752 | if ((type->t & VT_BTYPE) == VT_STRUCT) {
|
---|
753 | struct Sym *ref;
|
---|
754 | int btype, nb_fields = 0;
|
---|
755 |
|
---|
756 | ref = type->ref;
|
---|
757 | btype = ref->type.t & VT_BTYPE;
|
---|
758 | if (btype == VT_FLOAT || btype == VT_DOUBLE) {
|
---|
759 | for(; ref && btype == (ref->type.t & VT_BTYPE); ref = ref->next, nb_fields++);
|
---|
760 | return !ref && nb_fields <= 4;
|
---|
761 | }
|
---|
762 | }
|
---|
763 | return 0;
|
---|
764 | }
|
---|
765 |
|
---|
766 | struct avail_regs {
|
---|
767 | /* worst case: f(float, double, 3 float struct, double, 3 float struct, double) */
|
---|
768 | signed char avail[3];
|
---|
769 | int first_hole;
|
---|
770 | int last_hole;
|
---|
771 | int first_free_reg;
|
---|
772 | };
|
---|
773 |
|
---|
774 | #define AVAIL_REGS_INITIALIZER (struct avail_regs) { { 0, 0, 0}, 0, 0, 0 }
|
---|
775 |
|
---|
776 | /* Assign a register for a CPRC param with correct size and alignment
|
---|
777 | * size and align are in bytes, as returned by type_size */
|
---|
778 | int assign_fpreg(struct avail_regs *avregs, int align, int size)
|
---|
779 | {
|
---|
780 | int first_reg = 0;
|
---|
781 |
|
---|
782 | if (avregs->first_free_reg == -1)
|
---|
783 | return -1;
|
---|
784 | if (align >> 3) { // alignment needed (base type: double)
|
---|
785 | first_reg = avregs->first_free_reg;
|
---|
786 | if (first_reg & 1)
|
---|
787 | avregs->avail[avregs->last_hole++] = first_reg++;
|
---|
788 | } else {
|
---|
789 | if (size == 4 && avregs->first_hole != avregs->last_hole)
|
---|
790 | return avregs->avail[avregs->first_hole++];
|
---|
791 | else
|
---|
792 | first_reg = avregs->first_free_reg;
|
---|
793 | }
|
---|
794 | if (first_reg + size / 4 <= 16) {
|
---|
795 | avregs->first_free_reg = first_reg + size / 4;
|
---|
796 | return first_reg;
|
---|
797 | }
|
---|
798 | avregs->first_free_reg = -1;
|
---|
799 | return -1;
|
---|
800 | }
|
---|
801 | #endif
|
---|
802 |
|
---|
803 | /* Generate function call. The function address is pushed first, then
|
---|
804 | all the parameters in call order. This functions pops all the
|
---|
805 | parameters and the function address. */
|
---|
806 | void gfunc_call(int nb_args)
|
---|
807 | {
|
---|
808 | int size, align, r, args_size, i, ncrn, ncprn, argno, vfp_argno;
|
---|
809 | signed char plan[4][2]={{-1,-1},{-1,-1},{-1,-1},{-1,-1}};
|
---|
810 | SValue *before_stack = NULL; /* SValue before first on stack argument */
|
---|
811 | SValue *before_vfpreg_hfa = NULL; /* SValue before first in VFP reg hfa argument */
|
---|
812 | #ifdef TCC_ARM_HARDFLOAT
|
---|
813 | struct avail_regs avregs = AVAIL_REGS_INITIALIZER;
|
---|
814 | signed char vfp_plan[16];
|
---|
815 | int plan2[4+16];
|
---|
816 | int variadic;
|
---|
817 | #else
|
---|
818 | int plan2[4]={0,0,0,0};
|
---|
819 | #endif
|
---|
820 | int vfp_todo=0;
|
---|
821 | int todo=0, keep;
|
---|
822 |
|
---|
823 | #ifdef TCC_ARM_HARDFLOAT
|
---|
824 | memset(vfp_plan, -1, sizeof(vfp_plan));
|
---|
825 | memset(plan2, 0, sizeof(plan2));
|
---|
826 | variadic = (vtop[-nb_args].type.ref->c == FUNC_ELLIPSIS);
|
---|
827 | #endif
|
---|
828 | r = vtop->r & VT_VALMASK;
|
---|
829 | if (r == VT_CMP || (r & ~1) == VT_JMP)
|
---|
830 | gv(RC_INT);
|
---|
831 | #ifdef TCC_ARM_EABI
|
---|
832 | if((vtop[-nb_args].type.ref->type.t & VT_BTYPE) == VT_STRUCT
|
---|
833 | && type_size(&vtop[-nb_args].type.ref->type, &align) <= 4) {
|
---|
834 | SValue tmp;
|
---|
835 | tmp=vtop[-nb_args];
|
---|
836 | vtop[-nb_args]=vtop[-nb_args+1];
|
---|
837 | vtop[-nb_args+1]=tmp;
|
---|
838 | --nb_args;
|
---|
839 | }
|
---|
840 |
|
---|
841 | vpushi(0), nb_args++;
|
---|
842 | vtop->type.t = VT_LLONG;
|
---|
843 | #endif
|
---|
844 | ncrn = ncprn = argno = vfp_argno = args_size = 0;
|
---|
845 | /* Assign argument to registers and stack with alignment.
|
---|
846 | If, considering alignment constraints, enough registers of the correct type
|
---|
847 | (core or VFP) are free for the current argument, assign them to it, else
|
---|
848 | allocate on stack with correct alignment. Whenever a structure is allocated
|
---|
849 | in registers or on stack, it is always put on the stack at this stage. The
|
---|
850 | stack is divided in 3 zones. The zone are, from low addresses to high
|
---|
851 | addresses: structures to be loaded in core registers, structures to be
|
---|
852 | loaded in VFP registers, argument allocated to stack. SValue's representing
|
---|
853 | structures in the first zone are moved just after the SValue pointed by
|
---|
854 | before_vfpreg_hfa. SValue's representing structures in the second zone are
|
---|
855 | moved just after the SValue pointer by before_stack. */
|
---|
856 | for(i = nb_args; i-- ;) {
|
---|
857 | int j, assigned_vfpreg = 0;
|
---|
858 | size = type_size(&vtop[-i].type, &align);
|
---|
859 | switch(vtop[-i].type.t & VT_BTYPE) {
|
---|
860 | case VT_STRUCT:
|
---|
861 | case VT_FLOAT:
|
---|
862 | case VT_DOUBLE:
|
---|
863 | case VT_LDOUBLE:
|
---|
864 | #ifdef TCC_ARM_HARDFLOAT
|
---|
865 | if (!variadic) {
|
---|
866 | int hfa = 0; /* Homogeneous float aggregate */
|
---|
867 |
|
---|
868 | if (is_float(vtop[-i].type.t)
|
---|
869 | || (hfa = is_float_hgen_aggr(&vtop[-i].type))) {
|
---|
870 | int end_reg;
|
---|
871 |
|
---|
872 | assigned_vfpreg = assign_fpreg(&avregs, align, size);
|
---|
873 | end_reg = assigned_vfpreg + (size - 1) / 4;
|
---|
874 | if (assigned_vfpreg >= 0) {
|
---|
875 | vfp_plan[vfp_argno++]=TREG_F0 + assigned_vfpreg/2;
|
---|
876 | if (hfa) {
|
---|
877 | /* before_stack can only have been set because all core registers
|
---|
878 | are assigned, so no need to care about before_vfpreg_hfa if
|
---|
879 | before_stack is set */
|
---|
880 | if (before_stack) {
|
---|
881 | vrote(&vtop[-i], &vtop[-i] - before_stack);
|
---|
882 | before_stack++;
|
---|
883 | } else if (!before_vfpreg_hfa)
|
---|
884 | before_vfpreg_hfa = &vtop[-i-1];
|
---|
885 | for (j = assigned_vfpreg; j <= end_reg; j++)
|
---|
886 | vfp_todo|=(1<<j);
|
---|
887 | }
|
---|
888 | continue;
|
---|
889 | } else {
|
---|
890 | if (!hfa)
|
---|
891 | vfp_argno++;
|
---|
892 | /* No need to update before_stack as no more hfa can be allocated in
|
---|
893 | VFP regs */
|
---|
894 | if (!before_vfpreg_hfa)
|
---|
895 | before_vfpreg_hfa = &vtop[-i-1];
|
---|
896 | break;
|
---|
897 | }
|
---|
898 | }
|
---|
899 | }
|
---|
900 | #endif
|
---|
901 | ncrn = (ncrn + (align-1)/4) & -(align/4);
|
---|
902 | size = (size + 3) & -4;
|
---|
903 | if (ncrn + size/4 <= 4 || (ncrn < 4 && assigned_vfpreg != -1)) {
|
---|
904 | /* Either there is HFA in VFP registers, or there is arguments on stack,
|
---|
905 | it cannot be both. Hence either before_stack already points after
|
---|
906 | the slot where the vtop[-i] SValue is moved, or before_stack will not
|
---|
907 | be used */
|
---|
908 | if (before_vfpreg_hfa) {
|
---|
909 | vrote(&vtop[-i], &vtop[-i] - before_vfpreg_hfa);
|
---|
910 | before_vfpreg_hfa++;
|
---|
911 | }
|
---|
912 | for (j = ncrn; j < 4 && j < ncrn + size / 4; j++)
|
---|
913 | todo|=(1<<j);
|
---|
914 | ncrn+=size/4;
|
---|
915 | if (ncrn > 4) {
|
---|
916 | args_size = (ncrn - 4) * 4;
|
---|
917 | if (!before_stack)
|
---|
918 | before_stack = &vtop[-i-1];
|
---|
919 | }
|
---|
920 | }
|
---|
921 | else {
|
---|
922 | ncrn = 4;
|
---|
923 | /* No need to set before_vfpreg_hfa if not set since there will no
|
---|
924 | longer be any structure assigned to core registers */
|
---|
925 | if (!before_stack)
|
---|
926 | before_stack = &vtop[-i-1];
|
---|
927 | break;
|
---|
928 | }
|
---|
929 | continue;
|
---|
930 | default:
|
---|
931 | #ifdef TCC_ARM_EABI
|
---|
932 | if (!i) {
|
---|
933 | break;
|
---|
934 | }
|
---|
935 | #endif
|
---|
936 | if (ncrn < 4) {
|
---|
937 | int is_long = (vtop[-i].type.t & VT_BTYPE) == VT_LLONG;
|
---|
938 |
|
---|
939 | if (is_long) {
|
---|
940 | ncrn = (ncrn + 1) & -2;
|
---|
941 | if (ncrn == 4) {
|
---|
942 | argno++;
|
---|
943 | break;
|
---|
944 | }
|
---|
945 | }
|
---|
946 | plan[argno++][0]=ncrn++;
|
---|
947 | if (is_long) {
|
---|
948 | plan[argno-1][1]=ncrn++;
|
---|
949 | }
|
---|
950 | continue;
|
---|
951 | }
|
---|
952 | argno++;
|
---|
953 | }
|
---|
954 | #ifdef TCC_ARM_EABI
|
---|
955 | if(args_size & (align-1)) {
|
---|
956 | vpushi(0);
|
---|
957 | vtop->type.t = VT_VOID; /* padding */
|
---|
958 | vrott(i+2);
|
---|
959 | args_size += 4;
|
---|
960 | nb_args++;
|
---|
961 | argno++;
|
---|
962 | }
|
---|
963 | #endif
|
---|
964 | args_size += (size + 3) & -4;
|
---|
965 | }
|
---|
966 | #ifdef TCC_ARM_EABI
|
---|
967 | vtop--, nb_args--;
|
---|
968 | #endif
|
---|
969 | args_size = keep = 0;
|
---|
970 | for(i = 0;i < nb_args; i++) {
|
---|
971 | vrotb(keep+1);
|
---|
972 | if ((vtop->type.t & VT_BTYPE) == VT_STRUCT) {
|
---|
973 | size = type_size(&vtop->type, &align);
|
---|
974 | /* align to stack align size */
|
---|
975 | size = (size + 3) & -4;
|
---|
976 | /* allocate the necessary size on stack */
|
---|
977 | gadd_sp(-size);
|
---|
978 | /* generate structure store */
|
---|
979 | r = get_reg(RC_INT);
|
---|
980 | o(0xE1A0000D|(intr(r)<<12));
|
---|
981 | vset(&vtop->type, r | VT_LVAL, 0);
|
---|
982 | vswap();
|
---|
983 | vstore();
|
---|
984 | vtop--;
|
---|
985 | args_size += size;
|
---|
986 | } else if (is_float(vtop->type.t)) {
|
---|
987 | #ifdef TCC_ARM_HARDFLOAT
|
---|
988 | if (!variadic && --vfp_argno<16 && vfp_plan[vfp_argno]!=-1) {
|
---|
989 | plan2[keep++]=vfp_plan[vfp_argno];
|
---|
990 | continue;
|
---|
991 | }
|
---|
992 | #endif
|
---|
993 | #ifdef TCC_ARM_VFP
|
---|
994 | r=vfpr(gv(RC_FLOAT))<<12;
|
---|
995 | size=4;
|
---|
996 | if ((vtop->type.t & VT_BTYPE) != VT_FLOAT)
|
---|
997 | {
|
---|
998 | size=8;
|
---|
999 | r|=0x101; /* fstms -> fstmd */
|
---|
1000 | }
|
---|
1001 | o(0xED2D0A01+r);
|
---|
1002 | #else
|
---|
1003 | r=fpr(gv(RC_FLOAT))<<12;
|
---|
1004 | if ((vtop->type.t & VT_BTYPE) == VT_FLOAT)
|
---|
1005 | size = 4;
|
---|
1006 | else if ((vtop->type.t & VT_BTYPE) == VT_DOUBLE)
|
---|
1007 | size = 8;
|
---|
1008 | else
|
---|
1009 | size = LDOUBLE_SIZE;
|
---|
1010 |
|
---|
1011 | if (size == 12)
|
---|
1012 | r|=0x400000;
|
---|
1013 | else if(size == 8)
|
---|
1014 | r|=0x8000;
|
---|
1015 |
|
---|
1016 | o(0xED2D0100|r|(size>>2));
|
---|
1017 | #endif
|
---|
1018 | vtop--;
|
---|
1019 | args_size += size;
|
---|
1020 | } else {
|
---|
1021 | int s;
|
---|
1022 | /* simple type (currently always same size) */
|
---|
1023 | /* XXX: implicit cast ? */
|
---|
1024 | size=4;
|
---|
1025 | if ((vtop->type.t & VT_BTYPE) == VT_LLONG) {
|
---|
1026 | lexpand_nr();
|
---|
1027 | s=-1;
|
---|
1028 | if(--argno<4 && plan[argno][1]!=-1)
|
---|
1029 | s=plan[argno][1];
|
---|
1030 | argno++;
|
---|
1031 | size = 8;
|
---|
1032 | if(s==-1) {
|
---|
1033 | r = gv(RC_INT);
|
---|
1034 | o(0xE52D0004|(intr(r)<<12)); /* str r,[sp,#-4]! */
|
---|
1035 | vtop--;
|
---|
1036 | } else {
|
---|
1037 | size=0;
|
---|
1038 | plan2[keep]=s;
|
---|
1039 | keep++;
|
---|
1040 | vswap();
|
---|
1041 | }
|
---|
1042 | }
|
---|
1043 | s=-1;
|
---|
1044 | if(--argno<4 && plan[argno][0]!=-1)
|
---|
1045 | s=plan[argno][0];
|
---|
1046 | #ifdef TCC_ARM_EABI
|
---|
1047 | if(vtop->type.t == VT_VOID) {
|
---|
1048 | if(s == -1)
|
---|
1049 | o(0xE24DD004); /* sub sp,sp,#4 */
|
---|
1050 | vtop--;
|
---|
1051 | } else
|
---|
1052 | #endif
|
---|
1053 | if(s == -1) {
|
---|
1054 | r = gv(RC_INT);
|
---|
1055 | o(0xE52D0004|(intr(r)<<12)); /* str r,[sp,#-4]! */
|
---|
1056 | vtop--;
|
---|
1057 | } else {
|
---|
1058 | size=0;
|
---|
1059 | plan2[keep]=s;
|
---|
1060 | keep++;
|
---|
1061 | }
|
---|
1062 | args_size += size;
|
---|
1063 | }
|
---|
1064 | }
|
---|
1065 | for(i = 0; i < keep; i++) {
|
---|
1066 | vrotb(keep);
|
---|
1067 | gv(regmask(plan2[i]));
|
---|
1068 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1069 | /* arg is in s(2d+1): plan2[i]<plan2[i+1] => alignment occured (ex f,d,f) */
|
---|
1070 | if (i < keep - 1 && is_float(vtop->type.t) && (plan2[i] <= plan2[i + 1])) {
|
---|
1071 | o(0xEEF00A40|(vfpr(plan2[i])<<12)|vfpr(plan2[i]));
|
---|
1072 | }
|
---|
1073 | #endif
|
---|
1074 | }
|
---|
1075 | save_regs(keep); /* save used temporary registers */
|
---|
1076 | keep++;
|
---|
1077 | if(ncrn) {
|
---|
1078 | int nb_regs=0;
|
---|
1079 | if (ncrn>4)
|
---|
1080 | ncrn=4;
|
---|
1081 | todo&=((1<<ncrn)-1);
|
---|
1082 | if(todo) {
|
---|
1083 | int i;
|
---|
1084 | o(0xE8BD0000|todo);
|
---|
1085 | for(i=0;i<4;i++)
|
---|
1086 | if(todo&(1<<i)) {
|
---|
1087 | vpushi(0);
|
---|
1088 | vtop->r=i;
|
---|
1089 | keep++;
|
---|
1090 | nb_regs++;
|
---|
1091 | }
|
---|
1092 | }
|
---|
1093 | args_size-=nb_regs*4;
|
---|
1094 | }
|
---|
1095 | if(vfp_todo) {
|
---|
1096 | int nb_fregs=0;
|
---|
1097 |
|
---|
1098 | for(i=0;i<16;i++)
|
---|
1099 | if(vfp_todo&(1<<i)) {
|
---|
1100 | o(0xED9D0A00|(i&1)<<22|(i>>1)<<12|nb_fregs);
|
---|
1101 | vpushi(0);
|
---|
1102 | /* There might be 2 floats in a double VFP reg but that doesn't seem
|
---|
1103 | to matter */
|
---|
1104 | if (!(i%2))
|
---|
1105 | vtop->r=TREG_F0+i/2;
|
---|
1106 | keep++;
|
---|
1107 | nb_fregs++;
|
---|
1108 | }
|
---|
1109 | if (nb_fregs) {
|
---|
1110 | gadd_sp(nb_fregs*4);
|
---|
1111 | args_size-=nb_fregs*4;
|
---|
1112 | }
|
---|
1113 | }
|
---|
1114 | vrotb(keep);
|
---|
1115 | gcall_or_jmp(0);
|
---|
1116 | if (args_size)
|
---|
1117 | gadd_sp(args_size);
|
---|
1118 | #ifdef TCC_ARM_EABI
|
---|
1119 | if((vtop->type.ref->type.t & VT_BTYPE) == VT_STRUCT
|
---|
1120 | && type_size(&vtop->type.ref->type, &align) <= 4)
|
---|
1121 | {
|
---|
1122 | store(REG_IRET,vtop-keep);
|
---|
1123 | ++keep;
|
---|
1124 | }
|
---|
1125 | #ifdef TCC_ARM_VFP
|
---|
1126 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1127 | else if(variadic && is_float(vtop->type.ref->type.t)) {
|
---|
1128 | #else
|
---|
1129 | else if(is_float(vtop->type.ref->type.t)) {
|
---|
1130 | #endif
|
---|
1131 | if((vtop->type.ref->type.t & VT_BTYPE) == VT_FLOAT) {
|
---|
1132 | o(0xEE000A10); /* fmsr s0,r0 */
|
---|
1133 | } else {
|
---|
1134 | o(0xEE000B10); /* fmdlr d0,r0 */
|
---|
1135 | o(0xEE201B10); /* fmdhr d0,r1 */
|
---|
1136 | }
|
---|
1137 | }
|
---|
1138 | #endif
|
---|
1139 | #endif
|
---|
1140 | vtop-=keep;
|
---|
1141 | leaffunc = 0;
|
---|
1142 | }
|
---|
1143 |
|
---|
1144 | /* generate function prolog of type 't' */
|
---|
1145 | void gfunc_prolog(CType *func_type)
|
---|
1146 | {
|
---|
1147 | Sym *sym,*sym2;
|
---|
1148 | int n,nf,size,align, variadic, struct_ret = 0;
|
---|
1149 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1150 | struct avail_regs avregs = AVAIL_REGS_INITIALIZER;
|
---|
1151 | #endif
|
---|
1152 |
|
---|
1153 | sym = func_type->ref;
|
---|
1154 | func_vt = sym->type;
|
---|
1155 |
|
---|
1156 | n = nf = 0;
|
---|
1157 | variadic = (func_type->ref->c == FUNC_ELLIPSIS);
|
---|
1158 | if((func_vt.t & VT_BTYPE) == VT_STRUCT
|
---|
1159 | && type_size(&func_vt,&align) > 4)
|
---|
1160 | {
|
---|
1161 | n++;
|
---|
1162 | struct_ret = 1;
|
---|
1163 | func_vc = 12; /* Offset from fp of the place to store the result */
|
---|
1164 | }
|
---|
1165 | for(sym2=sym->next;sym2 && (n<4 || nf<16);sym2=sym2->next) {
|
---|
1166 | size = type_size(&sym2->type, &align);
|
---|
1167 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1168 | if (!variadic && (is_float(sym2->type.t)
|
---|
1169 | || is_float_hgen_aggr(&sym2->type))) {
|
---|
1170 | int tmpnf = assign_fpreg(&avregs, align, size) + 1;
|
---|
1171 | nf = (tmpnf > nf) ? tmpnf : nf;
|
---|
1172 | } else
|
---|
1173 | #endif
|
---|
1174 | if (n < 4)
|
---|
1175 | n += (size + 3) / 4;
|
---|
1176 | }
|
---|
1177 | o(0xE1A0C00D); /* mov ip,sp */
|
---|
1178 | if(variadic)
|
---|
1179 | n=4;
|
---|
1180 | if(n) {
|
---|
1181 | if(n>4)
|
---|
1182 | n=4;
|
---|
1183 | #ifdef TCC_ARM_EABI
|
---|
1184 | n=(n+1)&-2;
|
---|
1185 | #endif
|
---|
1186 | o(0xE92D0000|((1<<n)-1)); /* save r0-r4 on stack if needed */
|
---|
1187 | }
|
---|
1188 | if (nf) {
|
---|
1189 | if (nf>16)
|
---|
1190 | nf=16;
|
---|
1191 | nf=(nf+1)&-2; /* nf => HARDFLOAT => EABI */
|
---|
1192 | o(0xED2D0A00|nf); /* save s0-s15 on stack if needed */
|
---|
1193 | }
|
---|
1194 | o(0xE92D5800); /* save fp, ip, lr */
|
---|
1195 | o(0xE1A0B00D); /* mov fp, sp */
|
---|
1196 | func_sub_sp_offset = ind;
|
---|
1197 | o(0xE1A00000); /* nop, leave space for stack adjustment in epilogue */
|
---|
1198 | {
|
---|
1199 | int addr, pn = struct_ret, sn = 0; /* pn=core, sn=stack */
|
---|
1200 |
|
---|
1201 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1202 | avregs = AVAIL_REGS_INITIALIZER;
|
---|
1203 | #endif
|
---|
1204 | while ((sym = sym->next)) {
|
---|
1205 | CType *type;
|
---|
1206 | type = &sym->type;
|
---|
1207 | size = type_size(type, &align);
|
---|
1208 | size = (size + 3) >> 2;
|
---|
1209 | align = (align + 3) & ~3;
|
---|
1210 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1211 | if (!variadic && (is_float(sym->type.t)
|
---|
1212 | || is_float_hgen_aggr(&sym->type))) {
|
---|
1213 | int fpn = assign_fpreg(&avregs, align, size << 2);
|
---|
1214 | if (fpn >= 0) {
|
---|
1215 | addr = fpn * 4;
|
---|
1216 | } else
|
---|
1217 | goto from_stack;
|
---|
1218 | } else
|
---|
1219 | #endif
|
---|
1220 | if (pn < 4) {
|
---|
1221 | #ifdef TCC_ARM_EABI
|
---|
1222 | pn = (pn + (align-1)/4) & -(align/4);
|
---|
1223 | #endif
|
---|
1224 | addr = (nf + pn) * 4;
|
---|
1225 | pn += size;
|
---|
1226 | if (!sn && pn > 4)
|
---|
1227 | sn = (pn - 4);
|
---|
1228 | } else {
|
---|
1229 | #ifdef TCC_ARM_HARDFLOAT
|
---|
1230 | from_stack:
|
---|
1231 | #endif
|
---|
1232 | #ifdef TCC_ARM_EABI
|
---|
1233 | sn = (sn + (align-1)/4) & -(align/4);
|
---|
1234 | #endif
|
---|
1235 | addr = (n + nf + sn) * 4;
|
---|
1236 | sn += size;
|
---|
1237 | }
|
---|
1238 | sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | lvalue_type(type->t), addr+12);
|
---|
1239 | }
|
---|
1240 | }
|
---|
1241 | last_itod_magic=0;
|
---|
1242 | leaffunc = 1;
|
---|
1243 | loc = 0;
|
---|
1244 | }
|
---|
1245 |
|
---|
1246 | /* generate function epilog */
|
---|
1247 | void gfunc_epilog(void)
|
---|
1248 | {
|
---|
1249 | uint32_t x;
|
---|
1250 | int diff;
|
---|
1251 | #ifdef TCC_ARM_EABI
|
---|
1252 | /* Useless but harmless copy of the float result into main register(s) in case
|
---|
1253 | of variadic function in the hardfloat variant */
|
---|
1254 | if(is_float(func_vt.t)) {
|
---|
1255 | if((func_vt.t & VT_BTYPE) == VT_FLOAT)
|
---|
1256 | o(0xEE100A10); /* fmrs r0, s0 */
|
---|
1257 | else {
|
---|
1258 | o(0xEE100B10); /* fmrdl r0, d0 */
|
---|
1259 | o(0xEE301B10); /* fmrdh r1, d0 */
|
---|
1260 | }
|
---|
1261 | }
|
---|
1262 | #endif
|
---|
1263 | o(0xE89BA800); /* restore fp, sp, pc */
|
---|
1264 | diff = (-loc + 3) & -4;
|
---|
1265 | #ifdef TCC_ARM_EABI
|
---|
1266 | if(!leaffunc)
|
---|
1267 | diff = ((diff + 11) & -8) - 4;
|
---|
1268 | #endif
|
---|
1269 | if(diff > 0) {
|
---|
1270 | x=stuff_const(0xE24BD000, diff); /* sub sp,fp,# */
|
---|
1271 | if(x)
|
---|
1272 | *(uint32_t *)(cur_text_section->data + func_sub_sp_offset) = x;
|
---|
1273 | else {
|
---|
1274 | int addr;
|
---|
1275 | addr=ind;
|
---|
1276 | o(0xE59FC004); /* ldr ip,[pc+4] */
|
---|
1277 | o(0xE04BD00C); /* sub sp,fp,ip */
|
---|
1278 | o(0xE1A0F00E); /* mov pc,lr */
|
---|
1279 | o(diff);
|
---|
1280 | *(uint32_t *)(cur_text_section->data + func_sub_sp_offset) = 0xE1000000|encbranch(func_sub_sp_offset,addr,1);
|
---|
1281 | }
|
---|
1282 | }
|
---|
1283 | }
|
---|
1284 |
|
---|
1285 | /* generate a jump to a label */
|
---|
1286 | int gjmp(int t)
|
---|
1287 | {
|
---|
1288 | int r;
|
---|
1289 | r=ind;
|
---|
1290 | o(0xE0000000|encbranch(r,t,1));
|
---|
1291 | return r;
|
---|
1292 | }
|
---|
1293 |
|
---|
1294 | /* generate a jump to a fixed address */
|
---|
1295 | void gjmp_addr(int a)
|
---|
1296 | {
|
---|
1297 | gjmp(a);
|
---|
1298 | }
|
---|
1299 |
|
---|
1300 | /* generate a test. set 'inv' to invert test. Stack entry is popped */
|
---|
1301 | int gtst(int inv, int t)
|
---|
1302 | {
|
---|
1303 | int v, r;
|
---|
1304 | uint32_t op;
|
---|
1305 | v = vtop->r & VT_VALMASK;
|
---|
1306 | r=ind;
|
---|
1307 | if (v == VT_CMP) {
|
---|
1308 | op=mapcc(inv?negcc(vtop->c.i):vtop->c.i);
|
---|
1309 | op|=encbranch(r,t,1);
|
---|
1310 | o(op);
|
---|
1311 | t=r;
|
---|
1312 | } else if (v == VT_JMP || v == VT_JMPI) {
|
---|
1313 | if ((v & 1) == inv) {
|
---|
1314 | if(!vtop->c.i)
|
---|
1315 | vtop->c.i=t;
|
---|
1316 | else {
|
---|
1317 | uint32_t *x;
|
---|
1318 | int p,lp;
|
---|
1319 | if(t) {
|
---|
1320 | p = vtop->c.i;
|
---|
1321 | do {
|
---|
1322 | p = decbranch(lp=p);
|
---|
1323 | } while(p);
|
---|
1324 | x = (uint32_t *)(cur_text_section->data + lp);
|
---|
1325 | *x &= 0xff000000;
|
---|
1326 | *x |= encbranch(lp,t,1);
|
---|
1327 | }
|
---|
1328 | t = vtop->c.i;
|
---|
1329 | }
|
---|
1330 | } else {
|
---|
1331 | t = gjmp(t);
|
---|
1332 | gsym(vtop->c.i);
|
---|
1333 | }
|
---|
1334 | } else {
|
---|
1335 | if (is_float(vtop->type.t)) {
|
---|
1336 | r=gv(RC_FLOAT);
|
---|
1337 | #ifdef TCC_ARM_VFP
|
---|
1338 | o(0xEEB50A40|(vfpr(r)<<12)|T2CPR(vtop->type.t)); /* fcmpzX */
|
---|
1339 | o(0xEEF1FA10); /* fmstat */
|
---|
1340 | #else
|
---|
1341 | o(0xEE90F118|(fpr(r)<<16));
|
---|
1342 | #endif
|
---|
1343 | vtop->r = VT_CMP;
|
---|
1344 | vtop->c.i = TOK_NE;
|
---|
1345 | return gtst(inv, t);
|
---|
1346 | } else if ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
1347 | /* constant jmp optimization */
|
---|
1348 | if ((vtop->c.i != 0) != inv)
|
---|
1349 | t = gjmp(t);
|
---|
1350 | } else {
|
---|
1351 | v = gv(RC_INT);
|
---|
1352 | o(0xE3300000|(intr(v)<<16));
|
---|
1353 | vtop->r = VT_CMP;
|
---|
1354 | vtop->c.i = TOK_NE;
|
---|
1355 | return gtst(inv, t);
|
---|
1356 | }
|
---|
1357 | }
|
---|
1358 | vtop--;
|
---|
1359 | return t;
|
---|
1360 | }
|
---|
1361 |
|
---|
1362 | /* generate an integer binary operation */
|
---|
1363 | void gen_opi(int op)
|
---|
1364 | {
|
---|
1365 | int c, func = 0;
|
---|
1366 | uint32_t opc = 0, r, fr;
|
---|
1367 | unsigned short retreg = REG_IRET;
|
---|
1368 |
|
---|
1369 | c=0;
|
---|
1370 | switch(op) {
|
---|
1371 | case '+':
|
---|
1372 | opc = 0x8;
|
---|
1373 | c=1;
|
---|
1374 | break;
|
---|
1375 | case TOK_ADDC1: /* add with carry generation */
|
---|
1376 | opc = 0x9;
|
---|
1377 | c=1;
|
---|
1378 | break;
|
---|
1379 | case '-':
|
---|
1380 | opc = 0x4;
|
---|
1381 | c=1;
|
---|
1382 | break;
|
---|
1383 | case TOK_SUBC1: /* sub with carry generation */
|
---|
1384 | opc = 0x5;
|
---|
1385 | c=1;
|
---|
1386 | break;
|
---|
1387 | case TOK_ADDC2: /* add with carry use */
|
---|
1388 | opc = 0xA;
|
---|
1389 | c=1;
|
---|
1390 | break;
|
---|
1391 | case TOK_SUBC2: /* sub with carry use */
|
---|
1392 | opc = 0xC;
|
---|
1393 | c=1;
|
---|
1394 | break;
|
---|
1395 | case '&':
|
---|
1396 | opc = 0x0;
|
---|
1397 | c=1;
|
---|
1398 | break;
|
---|
1399 | case '^':
|
---|
1400 | opc = 0x2;
|
---|
1401 | c=1;
|
---|
1402 | break;
|
---|
1403 | case '|':
|
---|
1404 | opc = 0x18;
|
---|
1405 | c=1;
|
---|
1406 | break;
|
---|
1407 | case '*':
|
---|
1408 | gv2(RC_INT, RC_INT);
|
---|
1409 | r = vtop[-1].r;
|
---|
1410 | fr = vtop[0].r;
|
---|
1411 | vtop--;
|
---|
1412 | o(0xE0000090|(intr(r)<<16)|(intr(r)<<8)|intr(fr));
|
---|
1413 | return;
|
---|
1414 | case TOK_SHL:
|
---|
1415 | opc = 0;
|
---|
1416 | c=2;
|
---|
1417 | break;
|
---|
1418 | case TOK_SHR:
|
---|
1419 | opc = 1;
|
---|
1420 | c=2;
|
---|
1421 | break;
|
---|
1422 | case TOK_SAR:
|
---|
1423 | opc = 2;
|
---|
1424 | c=2;
|
---|
1425 | break;
|
---|
1426 | case '/':
|
---|
1427 | case TOK_PDIV:
|
---|
1428 | func=TOK___divsi3;
|
---|
1429 | c=3;
|
---|
1430 | break;
|
---|
1431 | case TOK_UDIV:
|
---|
1432 | func=TOK___udivsi3;
|
---|
1433 | c=3;
|
---|
1434 | break;
|
---|
1435 | case '%':
|
---|
1436 | #ifdef TCC_ARM_EABI
|
---|
1437 | func=TOK___aeabi_idivmod;
|
---|
1438 | retreg=REG_LRET;
|
---|
1439 | #else
|
---|
1440 | func=TOK___modsi3;
|
---|
1441 | #endif
|
---|
1442 | c=3;
|
---|
1443 | break;
|
---|
1444 | case TOK_UMOD:
|
---|
1445 | #ifdef TCC_ARM_EABI
|
---|
1446 | func=TOK___aeabi_uidivmod;
|
---|
1447 | retreg=REG_LRET;
|
---|
1448 | #else
|
---|
1449 | func=TOK___umodsi3;
|
---|
1450 | #endif
|
---|
1451 | c=3;
|
---|
1452 | break;
|
---|
1453 | case TOK_UMULL:
|
---|
1454 | gv2(RC_INT, RC_INT);
|
---|
1455 | r=intr(vtop[-1].r2=get_reg(RC_INT));
|
---|
1456 | c=vtop[-1].r;
|
---|
1457 | vtop[-1].r=get_reg_ex(RC_INT,regmask(c));
|
---|
1458 | vtop--;
|
---|
1459 | o(0xE0800090|(r<<16)|(intr(vtop->r)<<12)|(intr(c)<<8)|intr(vtop[1].r));
|
---|
1460 | return;
|
---|
1461 | default:
|
---|
1462 | opc = 0x15;
|
---|
1463 | c=1;
|
---|
1464 | break;
|
---|
1465 | }
|
---|
1466 | switch(c) {
|
---|
1467 | case 1:
|
---|
1468 | if((vtop[-1].r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
1469 | if(opc == 4 || opc == 5 || opc == 0xc) {
|
---|
1470 | vswap();
|
---|
1471 | opc|=2; // sub -> rsb
|
---|
1472 | }
|
---|
1473 | }
|
---|
1474 | if ((vtop->r & VT_VALMASK) == VT_CMP ||
|
---|
1475 | (vtop->r & (VT_VALMASK & ~1)) == VT_JMP)
|
---|
1476 | gv(RC_INT);
|
---|
1477 | vswap();
|
---|
1478 | c=intr(gv(RC_INT));
|
---|
1479 | vswap();
|
---|
1480 | opc=0xE0000000|(opc<<20)|(c<<16);
|
---|
1481 | if((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
1482 | uint32_t x;
|
---|
1483 | x=stuff_const(opc|0x2000000,vtop->c.i);
|
---|
1484 | if(x) {
|
---|
1485 | r=intr(vtop[-1].r=get_reg_ex(RC_INT,regmask(vtop[-1].r)));
|
---|
1486 | o(x|(r<<12));
|
---|
1487 | goto done;
|
---|
1488 | }
|
---|
1489 | }
|
---|
1490 | fr=intr(gv(RC_INT));
|
---|
1491 | r=intr(vtop[-1].r=get_reg_ex(RC_INT,two2mask(vtop->r,vtop[-1].r)));
|
---|
1492 | o(opc|(r<<12)|fr);
|
---|
1493 | done:
|
---|
1494 | vtop--;
|
---|
1495 | if (op >= TOK_ULT && op <= TOK_GT) {
|
---|
1496 | vtop->r = VT_CMP;
|
---|
1497 | vtop->c.i = op;
|
---|
1498 | }
|
---|
1499 | break;
|
---|
1500 | case 2:
|
---|
1501 | opc=0xE1A00000|(opc<<5);
|
---|
1502 | if ((vtop->r & VT_VALMASK) == VT_CMP ||
|
---|
1503 | (vtop->r & (VT_VALMASK & ~1)) == VT_JMP)
|
---|
1504 | gv(RC_INT);
|
---|
1505 | vswap();
|
---|
1506 | r=intr(gv(RC_INT));
|
---|
1507 | vswap();
|
---|
1508 | opc|=r;
|
---|
1509 | if ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST) {
|
---|
1510 | fr=intr(vtop[-1].r=get_reg_ex(RC_INT,regmask(vtop[-1].r)));
|
---|
1511 | c = vtop->c.i & 0x1f;
|
---|
1512 | o(opc|(c<<7)|(fr<<12));
|
---|
1513 | } else {
|
---|
1514 | fr=intr(gv(RC_INT));
|
---|
1515 | c=intr(vtop[-1].r=get_reg_ex(RC_INT,two2mask(vtop->r,vtop[-1].r)));
|
---|
1516 | o(opc|(c<<12)|(fr<<8)|0x10);
|
---|
1517 | }
|
---|
1518 | vtop--;
|
---|
1519 | break;
|
---|
1520 | case 3:
|
---|
1521 | vpush_global_sym(&func_old_type, func);
|
---|
1522 | vrott(3);
|
---|
1523 | gfunc_call(2);
|
---|
1524 | vpushi(0);
|
---|
1525 | vtop->r = retreg;
|
---|
1526 | break;
|
---|
1527 | default:
|
---|
1528 | tcc_error("gen_opi %i unimplemented!",op);
|
---|
1529 | }
|
---|
1530 | }
|
---|
1531 |
|
---|
1532 | #ifdef TCC_ARM_VFP
|
---|
1533 | static int is_zero(int i)
|
---|
1534 | {
|
---|
1535 | if((vtop[i].r & (VT_VALMASK | VT_LVAL | VT_SYM)) != VT_CONST)
|
---|
1536 | return 0;
|
---|
1537 | if (vtop[i].type.t == VT_FLOAT)
|
---|
1538 | return (vtop[i].c.f == 0.f);
|
---|
1539 | else if (vtop[i].type.t == VT_DOUBLE)
|
---|
1540 | return (vtop[i].c.d == 0.0);
|
---|
1541 | return (vtop[i].c.ld == 0.l);
|
---|
1542 | }
|
---|
1543 |
|
---|
1544 | /* generate a floating point operation 'v = t1 op t2' instruction. The
|
---|
1545 | * two operands are guaranted to have the same floating point type */
|
---|
1546 | void gen_opf(int op)
|
---|
1547 | {
|
---|
1548 | uint32_t x;
|
---|
1549 | int fneg=0,r;
|
---|
1550 | x=0xEE000A00|T2CPR(vtop->type.t);
|
---|
1551 | switch(op) {
|
---|
1552 | case '+':
|
---|
1553 | if(is_zero(-1))
|
---|
1554 | vswap();
|
---|
1555 | if(is_zero(0)) {
|
---|
1556 | vtop--;
|
---|
1557 | return;
|
---|
1558 | }
|
---|
1559 | x|=0x300000;
|
---|
1560 | break;
|
---|
1561 | case '-':
|
---|
1562 | x|=0x300040;
|
---|
1563 | if(is_zero(0)) {
|
---|
1564 | vtop--;
|
---|
1565 | return;
|
---|
1566 | }
|
---|
1567 | if(is_zero(-1)) {
|
---|
1568 | x|=0x810000; /* fsubX -> fnegX */
|
---|
1569 | vswap();
|
---|
1570 | vtop--;
|
---|
1571 | fneg=1;
|
---|
1572 | }
|
---|
1573 | break;
|
---|
1574 | case '*':
|
---|
1575 | x|=0x200000;
|
---|
1576 | break;
|
---|
1577 | case '/':
|
---|
1578 | x|=0x800000;
|
---|
1579 | break;
|
---|
1580 | default:
|
---|
1581 | if(op < TOK_ULT || op > TOK_GT) {
|
---|
1582 | tcc_error("unknown fp op %x!",op);
|
---|
1583 | return;
|
---|
1584 | }
|
---|
1585 | if(is_zero(-1)) {
|
---|
1586 | vswap();
|
---|
1587 | switch(op) {
|
---|
1588 | case TOK_LT: op=TOK_GT; break;
|
---|
1589 | case TOK_GE: op=TOK_ULE; break;
|
---|
1590 | case TOK_LE: op=TOK_GE; break;
|
---|
1591 | case TOK_GT: op=TOK_ULT; break;
|
---|
1592 | }
|
---|
1593 | }
|
---|
1594 | x|=0xB40040; /* fcmpX */
|
---|
1595 | if(op!=TOK_EQ && op!=TOK_NE)
|
---|
1596 | x|=0x80; /* fcmpX -> fcmpeX */
|
---|
1597 | if(is_zero(0)) {
|
---|
1598 | vtop--;
|
---|
1599 | o(x|0x10000|(vfpr(gv(RC_FLOAT))<<12)); /* fcmp(e)X -> fcmp(e)zX */
|
---|
1600 | } else {
|
---|
1601 | x|=vfpr(gv(RC_FLOAT));
|
---|
1602 | vswap();
|
---|
1603 | o(x|(vfpr(gv(RC_FLOAT))<<12));
|
---|
1604 | vtop--;
|
---|
1605 | }
|
---|
1606 | o(0xEEF1FA10); /* fmstat */
|
---|
1607 |
|
---|
1608 | switch(op) {
|
---|
1609 | case TOK_LE: op=TOK_ULE; break;
|
---|
1610 | case TOK_LT: op=TOK_ULT; break;
|
---|
1611 | case TOK_UGE: op=TOK_GE; break;
|
---|
1612 | case TOK_UGT: op=TOK_GT; break;
|
---|
1613 | }
|
---|
1614 |
|
---|
1615 | vtop->r = VT_CMP;
|
---|
1616 | vtop->c.i = op;
|
---|
1617 | return;
|
---|
1618 | }
|
---|
1619 | r=gv(RC_FLOAT);
|
---|
1620 | x|=vfpr(r);
|
---|
1621 | r=regmask(r);
|
---|
1622 | if(!fneg) {
|
---|
1623 | int r2;
|
---|
1624 | vswap();
|
---|
1625 | r2=gv(RC_FLOAT);
|
---|
1626 | x|=vfpr(r2)<<16;
|
---|
1627 | r|=regmask(r2);
|
---|
1628 | }
|
---|
1629 | vtop->r=get_reg_ex(RC_FLOAT,r);
|
---|
1630 | if(!fneg)
|
---|
1631 | vtop--;
|
---|
1632 | o(x|(vfpr(vtop->r)<<12));
|
---|
1633 | }
|
---|
1634 |
|
---|
1635 | #else
|
---|
1636 | static uint32_t is_fconst()
|
---|
1637 | {
|
---|
1638 | long double f;
|
---|
1639 | uint32_t r;
|
---|
1640 | if((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) != VT_CONST)
|
---|
1641 | return 0;
|
---|
1642 | if (vtop->type.t == VT_FLOAT)
|
---|
1643 | f = vtop->c.f;
|
---|
1644 | else if (vtop->type.t == VT_DOUBLE)
|
---|
1645 | f = vtop->c.d;
|
---|
1646 | else
|
---|
1647 | f = vtop->c.ld;
|
---|
1648 | if(!ieee_finite(f))
|
---|
1649 | return 0;
|
---|
1650 | r=0x8;
|
---|
1651 | if(f<0.0) {
|
---|
1652 | r=0x18;
|
---|
1653 | f=-f;
|
---|
1654 | }
|
---|
1655 | if(f==0.0)
|
---|
1656 | return r;
|
---|
1657 | if(f==1.0)
|
---|
1658 | return r|1;
|
---|
1659 | if(f==2.0)
|
---|
1660 | return r|2;
|
---|
1661 | if(f==3.0)
|
---|
1662 | return r|3;
|
---|
1663 | if(f==4.0)
|
---|
1664 | return r|4;
|
---|
1665 | if(f==5.0)
|
---|
1666 | return r|5;
|
---|
1667 | if(f==0.5)
|
---|
1668 | return r|6;
|
---|
1669 | if(f==10.0)
|
---|
1670 | return r|7;
|
---|
1671 | return 0;
|
---|
1672 | }
|
---|
1673 |
|
---|
1674 | /* generate a floating point operation 'v = t1 op t2' instruction. The
|
---|
1675 | two operands are guaranted to have the same floating point type */
|
---|
1676 | void gen_opf(int op)
|
---|
1677 | {
|
---|
1678 | uint32_t x, r, r2, c1, c2;
|
---|
1679 | //fputs("gen_opf\n",stderr);
|
---|
1680 | vswap();
|
---|
1681 | c1 = is_fconst();
|
---|
1682 | vswap();
|
---|
1683 | c2 = is_fconst();
|
---|
1684 | x=0xEE000100;
|
---|
1685 | #if LDOUBLE_SIZE == 8
|
---|
1686 | if ((vtop->type.t & VT_BTYPE) != VT_FLOAT)
|
---|
1687 | x|=0x80;
|
---|
1688 | #else
|
---|
1689 | if ((vtop->type.t & VT_BTYPE) == VT_DOUBLE)
|
---|
1690 | x|=0x80;
|
---|
1691 | else if ((vtop->type.t & VT_BTYPE) == VT_LDOUBLE)
|
---|
1692 | x|=0x80000;
|
---|
1693 | #endif
|
---|
1694 | switch(op)
|
---|
1695 | {
|
---|
1696 | case '+':
|
---|
1697 | if(!c2) {
|
---|
1698 | vswap();
|
---|
1699 | c2=c1;
|
---|
1700 | }
|
---|
1701 | vswap();
|
---|
1702 | r=fpr(gv(RC_FLOAT));
|
---|
1703 | vswap();
|
---|
1704 | if(c2) {
|
---|
1705 | if(c2>0xf)
|
---|
1706 | x|=0x200000; // suf
|
---|
1707 | r2=c2&0xf;
|
---|
1708 | } else {
|
---|
1709 | r2=fpr(gv(RC_FLOAT));
|
---|
1710 | }
|
---|
1711 | break;
|
---|
1712 | case '-':
|
---|
1713 | if(c2) {
|
---|
1714 | if(c2<=0xf)
|
---|
1715 | x|=0x200000; // suf
|
---|
1716 | r2=c2&0xf;
|
---|
1717 | vswap();
|
---|
1718 | r=fpr(gv(RC_FLOAT));
|
---|
1719 | vswap();
|
---|
1720 | } else if(c1 && c1<=0xf) {
|
---|
1721 | x|=0x300000; // rsf
|
---|
1722 | r2=c1;
|
---|
1723 | r=fpr(gv(RC_FLOAT));
|
---|
1724 | vswap();
|
---|
1725 | } else {
|
---|
1726 | x|=0x200000; // suf
|
---|
1727 | vswap();
|
---|
1728 | r=fpr(gv(RC_FLOAT));
|
---|
1729 | vswap();
|
---|
1730 | r2=fpr(gv(RC_FLOAT));
|
---|
1731 | }
|
---|
1732 | break;
|
---|
1733 | case '*':
|
---|
1734 | if(!c2 || c2>0xf) {
|
---|
1735 | vswap();
|
---|
1736 | c2=c1;
|
---|
1737 | }
|
---|
1738 | vswap();
|
---|
1739 | r=fpr(gv(RC_FLOAT));
|
---|
1740 | vswap();
|
---|
1741 | if(c2 && c2<=0xf)
|
---|
1742 | r2=c2;
|
---|
1743 | else
|
---|
1744 | r2=fpr(gv(RC_FLOAT));
|
---|
1745 | x|=0x100000; // muf
|
---|
1746 | break;
|
---|
1747 | case '/':
|
---|
1748 | if(c2 && c2<=0xf) {
|
---|
1749 | x|=0x400000; // dvf
|
---|
1750 | r2=c2;
|
---|
1751 | vswap();
|
---|
1752 | r=fpr(gv(RC_FLOAT));
|
---|
1753 | vswap();
|
---|
1754 | } else if(c1 && c1<=0xf) {
|
---|
1755 | x|=0x500000; // rdf
|
---|
1756 | r2=c1;
|
---|
1757 | r=fpr(gv(RC_FLOAT));
|
---|
1758 | vswap();
|
---|
1759 | } else {
|
---|
1760 | x|=0x400000; // dvf
|
---|
1761 | vswap();
|
---|
1762 | r=fpr(gv(RC_FLOAT));
|
---|
1763 | vswap();
|
---|
1764 | r2=fpr(gv(RC_FLOAT));
|
---|
1765 | }
|
---|
1766 | break;
|
---|
1767 | default:
|
---|
1768 | if(op >= TOK_ULT && op <= TOK_GT) {
|
---|
1769 | x|=0xd0f110; // cmfe
|
---|
1770 | /* bug (intention?) in Linux FPU emulator
|
---|
1771 | doesn't set carry if equal */
|
---|
1772 | switch(op) {
|
---|
1773 | case TOK_ULT:
|
---|
1774 | case TOK_UGE:
|
---|
1775 | case TOK_ULE:
|
---|
1776 | case TOK_UGT:
|
---|
1777 | tcc_error("unsigned comparision on floats?");
|
---|
1778 | break;
|
---|
1779 | case TOK_LT:
|
---|
1780 | op=TOK_Nset;
|
---|
1781 | break;
|
---|
1782 | case TOK_LE:
|
---|
1783 | op=TOK_ULE; /* correct in unordered case only if AC bit in FPSR set */
|
---|
1784 | break;
|
---|
1785 | case TOK_EQ:
|
---|
1786 | case TOK_NE:
|
---|
1787 | x&=~0x400000; // cmfe -> cmf
|
---|
1788 | break;
|
---|
1789 | }
|
---|
1790 | if(c1 && !c2) {
|
---|
1791 | c2=c1;
|
---|
1792 | vswap();
|
---|
1793 | switch(op) {
|
---|
1794 | case TOK_Nset:
|
---|
1795 | op=TOK_GT;
|
---|
1796 | break;
|
---|
1797 | case TOK_GE:
|
---|
1798 | op=TOK_ULE;
|
---|
1799 | break;
|
---|
1800 | case TOK_ULE:
|
---|
1801 | op=TOK_GE;
|
---|
1802 | break;
|
---|
1803 | case TOK_GT:
|
---|
1804 | op=TOK_Nset;
|
---|
1805 | break;
|
---|
1806 | }
|
---|
1807 | }
|
---|
1808 | vswap();
|
---|
1809 | r=fpr(gv(RC_FLOAT));
|
---|
1810 | vswap();
|
---|
1811 | if(c2) {
|
---|
1812 | if(c2>0xf)
|
---|
1813 | x|=0x200000;
|
---|
1814 | r2=c2&0xf;
|
---|
1815 | } else {
|
---|
1816 | r2=fpr(gv(RC_FLOAT));
|
---|
1817 | }
|
---|
1818 | vtop[-1].r = VT_CMP;
|
---|
1819 | vtop[-1].c.i = op;
|
---|
1820 | } else {
|
---|
1821 | tcc_error("unknown fp op %x!",op);
|
---|
1822 | return;
|
---|
1823 | }
|
---|
1824 | }
|
---|
1825 | if(vtop[-1].r == VT_CMP)
|
---|
1826 | c1=15;
|
---|
1827 | else {
|
---|
1828 | c1=vtop->r;
|
---|
1829 | if(r2&0x8)
|
---|
1830 | c1=vtop[-1].r;
|
---|
1831 | vtop[-1].r=get_reg_ex(RC_FLOAT,two2mask(vtop[-1].r,c1));
|
---|
1832 | c1=fpr(vtop[-1].r);
|
---|
1833 | }
|
---|
1834 | vtop--;
|
---|
1835 | o(x|(r<<16)|(c1<<12)|r2);
|
---|
1836 | }
|
---|
1837 | #endif
|
---|
1838 |
|
---|
1839 | /* convert integers to fp 't' type. Must handle 'int', 'unsigned int'
|
---|
1840 | and 'long long' cases. */
|
---|
1841 | ST_FUNC void gen_cvt_itof1(int t)
|
---|
1842 | {
|
---|
1843 | uint32_t r, r2;
|
---|
1844 | int bt;
|
---|
1845 | bt=vtop->type.t & VT_BTYPE;
|
---|
1846 | if(bt == VT_INT || bt == VT_SHORT || bt == VT_BYTE) {
|
---|
1847 | #ifndef TCC_ARM_VFP
|
---|
1848 | uint32_t dsize = 0;
|
---|
1849 | #endif
|
---|
1850 | r=intr(gv(RC_INT));
|
---|
1851 | #ifdef TCC_ARM_VFP
|
---|
1852 | r2=vfpr(vtop->r=get_reg(RC_FLOAT));
|
---|
1853 | o(0xEE000A10|(r<<12)|(r2<<16)); /* fmsr */
|
---|
1854 | r2|=r2<<12;
|
---|
1855 | if(!(vtop->type.t & VT_UNSIGNED))
|
---|
1856 | r2|=0x80; /* fuitoX -> fsituX */
|
---|
1857 | o(0xEEB80A40|r2|T2CPR(t)); /* fYitoX*/
|
---|
1858 | #else
|
---|
1859 | r2=fpr(vtop->r=get_reg(RC_FLOAT));
|
---|
1860 | if((t & VT_BTYPE) != VT_FLOAT)
|
---|
1861 | dsize=0x80; /* flts -> fltd */
|
---|
1862 | o(0xEE000110|dsize|(r2<<16)|(r<<12)); /* flts */
|
---|
1863 | if((vtop->type.t & (VT_UNSIGNED|VT_BTYPE)) == (VT_UNSIGNED|VT_INT)) {
|
---|
1864 | uint32_t off = 0;
|
---|
1865 | o(0xE3500000|(r<<12)); /* cmp */
|
---|
1866 | r=fpr(get_reg(RC_FLOAT));
|
---|
1867 | if(last_itod_magic) {
|
---|
1868 | off=ind+8-last_itod_magic;
|
---|
1869 | off/=4;
|
---|
1870 | if(off>255)
|
---|
1871 | off=0;
|
---|
1872 | }
|
---|
1873 | o(0xBD1F0100|(r<<12)|off); /* ldflts */
|
---|
1874 | if(!off) {
|
---|
1875 | o(0xEA000000); /* b */
|
---|
1876 | last_itod_magic=ind;
|
---|
1877 | o(0x4F800000); /* 4294967296.0f */
|
---|
1878 | }
|
---|
1879 | o(0xBE000100|dsize|(r2<<16)|(r2<<12)|r); /* adflt */
|
---|
1880 | }
|
---|
1881 | #endif
|
---|
1882 | return;
|
---|
1883 | } else if(bt == VT_LLONG) {
|
---|
1884 | int func;
|
---|
1885 | CType *func_type = 0;
|
---|
1886 | if((t & VT_BTYPE) == VT_FLOAT) {
|
---|
1887 | func_type = &func_float_type;
|
---|
1888 | if(vtop->type.t & VT_UNSIGNED)
|
---|
1889 | func=TOK___floatundisf;
|
---|
1890 | else
|
---|
1891 | func=TOK___floatdisf;
|
---|
1892 | #if LDOUBLE_SIZE != 8
|
---|
1893 | } else if((t & VT_BTYPE) == VT_LDOUBLE) {
|
---|
1894 | func_type = &func_ldouble_type;
|
---|
1895 | if(vtop->type.t & VT_UNSIGNED)
|
---|
1896 | func=TOK___floatundixf;
|
---|
1897 | else
|
---|
1898 | func=TOK___floatdixf;
|
---|
1899 | } else if((t & VT_BTYPE) == VT_DOUBLE) {
|
---|
1900 | #else
|
---|
1901 | } else if((t & VT_BTYPE) == VT_DOUBLE || (t & VT_BTYPE) == VT_LDOUBLE) {
|
---|
1902 | #endif
|
---|
1903 | func_type = &func_double_type;
|
---|
1904 | if(vtop->type.t & VT_UNSIGNED)
|
---|
1905 | func=TOK___floatundidf;
|
---|
1906 | else
|
---|
1907 | func=TOK___floatdidf;
|
---|
1908 | }
|
---|
1909 | if(func_type) {
|
---|
1910 | vpush_global_sym(func_type, func);
|
---|
1911 | vswap();
|
---|
1912 | gfunc_call(1);
|
---|
1913 | vpushi(0);
|
---|
1914 | vtop->r=TREG_F0;
|
---|
1915 | return;
|
---|
1916 | }
|
---|
1917 | }
|
---|
1918 | tcc_error("unimplemented gen_cvt_itof %x!",vtop->type.t);
|
---|
1919 | }
|
---|
1920 |
|
---|
1921 | /* convert fp to int 't' type */
|
---|
1922 | void gen_cvt_ftoi(int t)
|
---|
1923 | {
|
---|
1924 | uint32_t r, r2;
|
---|
1925 | int u, func = 0;
|
---|
1926 | u=t&VT_UNSIGNED;
|
---|
1927 | t&=VT_BTYPE;
|
---|
1928 | r2=vtop->type.t & VT_BTYPE;
|
---|
1929 | if(t==VT_INT) {
|
---|
1930 | #ifdef TCC_ARM_VFP
|
---|
1931 | r=vfpr(gv(RC_FLOAT));
|
---|
1932 | u=u?0:0x10000;
|
---|
1933 | o(0xEEBC0AC0|(r<<12)|r|T2CPR(r2)|u); /* ftoXizY */
|
---|
1934 | r2=intr(vtop->r=get_reg(RC_INT));
|
---|
1935 | o(0xEE100A10|(r<<16)|(r2<<12));
|
---|
1936 | return;
|
---|
1937 | #else
|
---|
1938 | if(u) {
|
---|
1939 | if(r2 == VT_FLOAT)
|
---|
1940 | func=TOK___fixunssfsi;
|
---|
1941 | #if LDOUBLE_SIZE != 8
|
---|
1942 | else if(r2 == VT_LDOUBLE)
|
---|
1943 | func=TOK___fixunsxfsi;
|
---|
1944 | else if(r2 == VT_DOUBLE)
|
---|
1945 | #else
|
---|
1946 | else if(r2 == VT_LDOUBLE || r2 == VT_DOUBLE)
|
---|
1947 | #endif
|
---|
1948 | func=TOK___fixunsdfsi;
|
---|
1949 | } else {
|
---|
1950 | r=fpr(gv(RC_FLOAT));
|
---|
1951 | r2=intr(vtop->r=get_reg(RC_INT));
|
---|
1952 | o(0xEE100170|(r2<<12)|r);
|
---|
1953 | return;
|
---|
1954 | }
|
---|
1955 | #endif
|
---|
1956 | } else if(t == VT_LLONG) { // unsigned handled in gen_cvt_ftoi1
|
---|
1957 | if(r2 == VT_FLOAT)
|
---|
1958 | func=TOK___fixsfdi;
|
---|
1959 | #if LDOUBLE_SIZE != 8
|
---|
1960 | else if(r2 == VT_LDOUBLE)
|
---|
1961 | func=TOK___fixxfdi;
|
---|
1962 | else if(r2 == VT_DOUBLE)
|
---|
1963 | #else
|
---|
1964 | else if(r2 == VT_LDOUBLE || r2 == VT_DOUBLE)
|
---|
1965 | #endif
|
---|
1966 | func=TOK___fixdfdi;
|
---|
1967 | }
|
---|
1968 | if(func) {
|
---|
1969 | vpush_global_sym(&func_old_type, func);
|
---|
1970 | vswap();
|
---|
1971 | gfunc_call(1);
|
---|
1972 | vpushi(0);
|
---|
1973 | if(t == VT_LLONG)
|
---|
1974 | vtop->r2 = REG_LRET;
|
---|
1975 | vtop->r = REG_IRET;
|
---|
1976 | return;
|
---|
1977 | }
|
---|
1978 | tcc_error("unimplemented gen_cvt_ftoi!");
|
---|
1979 | }
|
---|
1980 |
|
---|
1981 | /* convert from one floating point type to another */
|
---|
1982 | void gen_cvt_ftof(int t)
|
---|
1983 | {
|
---|
1984 | #ifdef TCC_ARM_VFP
|
---|
1985 | if(((vtop->type.t & VT_BTYPE) == VT_FLOAT) != ((t & VT_BTYPE) == VT_FLOAT)) {
|
---|
1986 | uint32_t r = vfpr(gv(RC_FLOAT));
|
---|
1987 | o(0xEEB70AC0|(r<<12)|r|T2CPR(vtop->type.t));
|
---|
1988 | }
|
---|
1989 | #else
|
---|
1990 | /* all we have to do on i386 and FPA ARM is to put the float in a register */
|
---|
1991 | gv(RC_FLOAT);
|
---|
1992 | #endif
|
---|
1993 | }
|
---|
1994 |
|
---|
1995 | /* computed goto support */
|
---|
1996 | void ggoto(void)
|
---|
1997 | {
|
---|
1998 | gcall_or_jmp(1);
|
---|
1999 | vtop--;
|
---|
2000 | }
|
---|
2001 |
|
---|
2002 | /* end of ARM code generator */
|
---|
2003 | /*************************************************************/
|
---|
2004 | #endif
|
---|
2005 | /*************************************************************/
|
---|