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1 /*
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2
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3 Package: dyncall
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4 Library: dyncall
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5 File: dyncall/dyncall_callvm_mips_o32.c
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6 Description: mips "o32" ABI callvm implementation
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7 License:
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8
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9 Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>,
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10 Tassilo Philipp <tphilipp@potion-studios.com>
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11
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12 Permission to use, copy, modify, and distribute this software for any
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13 purpose with or without fee is hereby granted, provided that the above
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14 copyright notice and this permission notice appear in all copies.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23
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24 */
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25
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26
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27
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28 /*
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29
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30 dyncall callvm for mips o32 abi
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31
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32 REVISION
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33 2010/06/03 initial
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34
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35 NOTES:
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36 we need an argument counter for supporting floating point arguments
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37 correctly.
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38
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39 first two (if any) double/float arguments are mapped via a common structure --
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40 code must take care to write the right float argument indices which
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41 differs on C and Assembly-side depending on endianness. (therefore
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42 both sources have two variants 'mipseb' and 'mipsel'.)
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43 (only for the first two float/double arguments) see float/double handling
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44
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45 although, the abi does not expect usage of floats if first argument is
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46 not floating point, the call kernel can be used universal for all cases.
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47
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48 */
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49
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50
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51 #include "dyncall_callvm_mips_o32.h"
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52 #include "dyncall_alloc.h"
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53 #include "dyncall_utils.h"
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54
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55
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56 static void dc_callvm_reset_mips_o32(DCCallVM* in_self)
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57 {
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58 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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59 dcVecReset(&self->mVecHead);
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60 self->mArgCount = 0;
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61 }
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62
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63 static DCCallVM* dc_callvm_new_mips_o32(DCCallVM_vt* vt, DCsize size)
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64 {
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65 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)dcAllocMem(sizeof(DCCallVM_mips_o32)+size);
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66 dc_callvm_base_init(&self->mInterface, vt);
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67 dcVecInit(&self->mVecHead, size);
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68 dc_callvm_reset_mips_o32( (DCCallVM*) self );
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69 return (DCCallVM*)self;
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70 }
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71
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72
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73 static void dc_callvm_free_mips_o32(DCCallVM* in_self)
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74 {
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75 dcFreeMem(in_self);
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76 }
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77
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78 static void dc_callvm_mode_mips_o32(DCCallVM* self, DCint mode)
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79 {
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80 switch(mode) {
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81 case DC_CALL_C_DEFAULT:
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82 case DC_CALL_C_ELLIPSIS:
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83 case DC_CALL_C_MIPS32_O32:
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84 break;
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85 default:
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86 self->mError = DC_ERROR_UNSUPPORTED_MODE;
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87 break;
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88 }
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89 }
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90
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91 /* arg int -- fillup integer register file OR push on stack */
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92
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93 static void dc_callvm_argInt_mips_o32(DCCallVM* in_self, DCint i)
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94 {
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95 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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96 dcVecAppend(&self->mVecHead, &i, sizeof(DCint));
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97 self->mArgCount++;
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98 }
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99
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100 static void dc_callvm_argPointer_mips_o32(DCCallVM* in_self, DCpointer x)
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101 {
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102 dc_callvm_argInt_mips_o32(in_self, * (DCint*) &x );
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103 }
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104
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105 static void dc_callvm_argBool_mips_o32(DCCallVM* in_self, DCbool x)
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106 {
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107 dc_callvm_argInt_mips_o32(in_self, (DCint)x);
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108 }
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109
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110 static void dc_callvm_argChar_mips_o32(DCCallVM* in_self, DCchar x)
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111 {
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112 dc_callvm_argInt_mips_o32(in_self, (DCint)x);
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113 }
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114
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115 static void dc_callvm_argShort_mips_o32(DCCallVM* in_self, DCshort x)
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116 {
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117 dc_callvm_argInt_mips_o32(in_self, (DCint)x);
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118 }
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119
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120 static void dc_callvm_argLong_mips_o32(DCCallVM* in_self, DClong x)
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121 {
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122 dc_callvm_argInt_mips_o32(in_self, (DCint)x);
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123 }
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124
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125 static void dc_callvm_argLongLong_mips_o32(DCCallVM* in_self, DClonglong Lv)
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126 {
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127 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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128
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129 /* 64-bit values need to be aligned on 8 byte boundaries */
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130 dcVecSkip(&self->mVecHead, dcVecSize(&self->mVecHead) & 4);
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131 dcVecAppend(&self->mVecHead, &Lv, sizeof(DClonglong));
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132 self->mArgCount += 1;
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133 }
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134
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135 static void dc_callvm_argFloat_mips_o32(DCCallVM* in_self, DCfloat x)
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136 {
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137 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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138
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139 dcVecAppend(&self->mVecHead, &x, sizeof(DCfloat) );
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140 if (self->mArgCount < 2) {
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141 #if defined(__MIPSEL__)
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142 self->mRegData.u[self->mArgCount].f[0] = x;
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143 #else
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144 self->mRegData.u[self->mArgCount].f[1] = x;
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145 #endif
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146 #if 0
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147 self->mRegData.u[self->mArgCount].f[1] = x;
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148 call kernel
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149
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150 mips:
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151 lwc1 $f12, 4($5) <--- byte offset 4
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152 lwc1 $f13, 0($5)
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153 lwc1 $f14, 12($5) <--- byte offset 12
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154 lwc1 $f15, 8($5)
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155 mipsel:
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156 lwc1 $f12, 0($5) <--- byte offset 4
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157 lwc1 $f13, 4($5)
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158 lwc1 $f14, 8($5) <--- byte offset 12
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159 lwc1 $f15, 12($5)
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160
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161 #if defined(__MIPSEL__)
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162 /* index 0 and 2 */
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163 self->mRegData.floats[self->mArgCount*2] = x;
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164 #else
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165 /* index 1 and 3 */
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166 self->mRegData.floats[self->mArgCount*2+1] = x;
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167 #endif
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168 #endif
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169 }
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170 self->mArgCount++;
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171 }
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172
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173 static void dc_callvm_argDouble_mips_o32(DCCallVM* in_self, DCdouble x)
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174 {
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175 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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176 /* 64-bit values need to be aligned on 8 byte boundaries */
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177 dcVecSkip(&self->mVecHead, dcVecSize(&self->mVecHead) & 4);
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178 dcVecAppend(&self->mVecHead, &x, sizeof(DCdouble) );
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179 if (self->mArgCount < 2)
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180 self->mRegData.u[self->mArgCount].d = x;
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181 self->mArgCount++;
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182 }
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183
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184 /* Call. */
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185 void dc_callvm_call_mips_o32(DCCallVM* in_self, DCpointer target)
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186 {
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187 DCCallVM_mips_o32* self = (DCCallVM_mips_o32*)in_self;
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188 /* at minimum provide 16-bytes
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189 which hold the first four integer register as spill area
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190 and are automatically loaded to $4-$7
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191 */
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192
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193 size_t size = DC_MAX(16, ( ( (unsigned) dcVecSize(&self->mVecHead) ) +7UL ) & (-8UL) );
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194
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195 dcCall_mips_o32(target, &self->mRegData, size, dcVecData(&self->mVecHead));
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196 }
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197
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198 DCCallVM_vt gVT_mips_o32 =
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199 {
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200 &dc_callvm_free_mips_o32
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201 , &dc_callvm_reset_mips_o32
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202 , &dc_callvm_mode_mips_o32
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203 , &dc_callvm_argBool_mips_o32
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204 , &dc_callvm_argChar_mips_o32
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205 , &dc_callvm_argShort_mips_o32
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206 , &dc_callvm_argInt_mips_o32
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207 , &dc_callvm_argLong_mips_o32
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208 , &dc_callvm_argLongLong_mips_o32
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209 , &dc_callvm_argFloat_mips_o32
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210 , &dc_callvm_argDouble_mips_o32
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211 , &dc_callvm_argPointer_mips_o32
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212 , NULL /* argStruct */
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213 , (DCvoidvmfunc*) &dc_callvm_call_mips_o32
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214 , (DCboolvmfunc*) &dc_callvm_call_mips_o32
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215 , (DCcharvmfunc*) &dc_callvm_call_mips_o32
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216 , (DCshortvmfunc*) &dc_callvm_call_mips_o32
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217 , (DCintvmfunc*) &dc_callvm_call_mips_o32
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218 , (DClongvmfunc*) &dc_callvm_call_mips_o32
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219 , (DClonglongvmfunc*) &dc_callvm_call_mips_o32
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220 , (DCfloatvmfunc*) &dc_callvm_call_mips_o32
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221 , (DCdoublevmfunc*) &dc_callvm_call_mips_o32
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222 , (DCpointervmfunc*) &dc_callvm_call_mips_o32
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223 , NULL /* callStruct */
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224 };
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225
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226 DCCallVM* dcNewCallVM_mips_o32(DCsize size)
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227 {
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228 return dc_callvm_new_mips_o32(&gVT_mips_o32, size);
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229 }
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230
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231
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232 DCCallVM* dcNewCallVM(DCsize size)
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233 {
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234 return dcNewCallVM_mips_o32(size);
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235 }
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236
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