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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_n32.c
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6 Description: mips "n32" 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 64bit MIPS family of processors
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31
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32 SUPPORTED CALLING CONVENTIONS
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33 n32
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34
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35 REVISION
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36 2010/05/30 initial
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37
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38 in contrast to o32, there is no space reserved for parameters
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39 passed over registers.
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40 more registers are used and registers are always used.
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41
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42 stack is always 16-byte aligned at entry (call to call-kernel automatically
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43 aligns argument stack.
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44
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45 integer and float register-file is interleaved either taking one slot up
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46 skipping the other.
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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
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52 #include "dyncall_callvm_mips_n32.h"
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53 #include "dyncall_alloc.h"
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54 #include "dyncall_utils.h"
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55
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56 static void dc_callvm_reset_mips_n32(DCCallVM* in_self)
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57 {
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58 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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59 dcVecReset(&self->mVecHead);
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60 self->mRegCount = 0;
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61 self->mRegData.mUseDouble = 0LL;
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62 }
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63
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64
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65 static void dc_callvm_free_mips_n32(DCCallVM* in_self)
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66 {
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67 dcFreeMem(in_self);
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68 }
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69
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70 /* pass arguments :
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71
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72 - promote to 64-bit integer.
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73 - fill up integers and float - left-to-right otherwise go over stack.
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74 */
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75
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76 /* arg int -- fillup 64-bit integer register file OR push on stack */
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77
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78 static void dc_callvm_argLongLong_mips_n32(DCCallVM* in_self, DClonglong Lv)
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79 {
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80 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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81 /* fillup integer register file */
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82 if (self->mRegCount < 8)
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83 self->mRegData.mIntData[self->mRegCount++] = Lv;
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84 else
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85 dcVecAppend(&self->mVecHead, &Lv, sizeof(DClonglong));
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86 }
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87
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88 static void dc_callvm_argInt_mips_n32(DCCallVM* in_self, DCint i)
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89 {
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90 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong) i );
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91 }
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92
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93 static void dc_callvm_argPointer_mips_n32(DCCallVM* in_self, DCpointer x)
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94 {
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95 dc_callvm_argLongLong_mips_n32(in_self, * (DClonglong*) &x );
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96 }
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97
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98 static void dc_callvm_argBool_mips_n32(DCCallVM* in_self, DCbool x)
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99 {
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100 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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101 }
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102
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103 static void dc_callvm_argChar_mips_n32(DCCallVM* in_self, DCchar x)
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104 {
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105 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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106 }
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107
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108 static void dc_callvm_argShort_mips_n32(DCCallVM* in_self, DCshort x)
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109 {
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110 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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111 }
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112
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113 static void dc_callvm_argLong_mips_n32(DCCallVM* in_self, DClong x)
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114 {
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115 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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116 }
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117
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118 static void dc_callvm_argDouble_mips_n32(DCCallVM* in_self, DCdouble x)
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119 {
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120 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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121 if (self->mRegCount < 8) {
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122 self->mRegData.mUseDouble |= 1<<( self->mRegCount );
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123 self->mRegData.mFloatData[self->mRegCount++].d = x;
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124 } else {
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125 dcVecAppend(&self->mVecHead, &x, sizeof(DCdouble) );
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126 }
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127 }
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128
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129 static void dc_callvm_argFloat_mips_n32(DCCallVM* in_self, DCfloat x)
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130 {
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131 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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132 if (self->mRegCount < 8) {
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133 /*self->mRegData.mFloatData[self->mRegCount++].d = (DCdouble) x;*/
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134 self->mRegData.mFloatData[self->mRegCount++].f = x;
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135 } else {
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136 dcVecAppend(&self->mVecHead, &x, sizeof(DCfloat) );
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137 dcVecSkip(&self->mVecHead, sizeof(DCfloat) );
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138 }
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139 }
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140
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141
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142 /* Ellipsis calls:
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143 - float is promoted to double (due to ANSI C).
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144 - double is passed via integer register-file (due to MIPS ABI).
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145 */
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146
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147 static void dc_callvm_argDouble_mips_n32_ellipsis(DCCallVM* in_self, DCdouble x)
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148 {
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149 dc_callvm_argLongLong_mips_n32(in_self, * ( (DClonglong*) &x ) );
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150 }
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151
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152 static void dc_callvm_argFloat_mips_n32_ellipsis(DCCallVM* in_self, DCfloat x)
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153 {
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154 dc_callvm_argDouble_mips_n32_ellipsis(in_self, (DCdouble) x );
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155 }
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156
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157
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158 /* Call. */
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159
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160 void dc_callvm_call_mips_n32(DCCallVM* in_self, DCpointer target)
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161 {
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162 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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163 /* at minimum provide 16-bytes
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164 which hold the first four integer register as spill area
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165 and are automatically loaded to $4-$7
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166 */
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167 size_t size = DC_MAX(16, ( ( (unsigned) dcVecSize(&self->mVecHead) ) +7UL ) & (-8UL) );
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168 dcCall_mips_n32(target, &self->mRegData, size, dcVecData(&self->mVecHead));
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169 }
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170
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171 /* Forward Declaration. */
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172 static void dc_callvm_mode_mips_n32(DCCallVM* in_self,DCint mode);
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173
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174 DCCallVM_vt gVT_mips_n32 =
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175 {
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176 &dc_callvm_free_mips_n32
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177 , &dc_callvm_reset_mips_n32
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178 , &dc_callvm_mode_mips_n32
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179 , &dc_callvm_argBool_mips_n32
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180 , &dc_callvm_argChar_mips_n32
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181 , &dc_callvm_argShort_mips_n32
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182 , &dc_callvm_argInt_mips_n32
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183 , &dc_callvm_argLong_mips_n32
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184 , &dc_callvm_argLongLong_mips_n32
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185 , &dc_callvm_argFloat_mips_n32
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186 , &dc_callvm_argDouble_mips_n32
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187 , &dc_callvm_argPointer_mips_n32
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188 , NULL /* argStruct */
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189 , (DCvoidvmfunc*) &dc_callvm_call_mips_n32
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190 , (DCboolvmfunc*) &dc_callvm_call_mips_n32
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191 , (DCcharvmfunc*) &dc_callvm_call_mips_n32
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192 , (DCshortvmfunc*) &dc_callvm_call_mips_n32
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193 , (DCintvmfunc*) &dc_callvm_call_mips_n32
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194 , (DClongvmfunc*) &dc_callvm_call_mips_n32
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195 , (DClonglongvmfunc*) &dc_callvm_call_mips_n32
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196 , (DCfloatvmfunc*) &dc_callvm_call_mips_n32
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197 , (DCdoublevmfunc*) &dc_callvm_call_mips_n32
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198 , (DCpointervmfunc*) &dc_callvm_call_mips_n32
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199 , NULL /* callStruct */
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200 };
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201
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202 DCCallVM_vt gVT_mips_n32_ellipsis =
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203 {
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204 &dc_callvm_free_mips_n32
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205 , &dc_callvm_reset_mips_n32
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206 , &dc_callvm_mode_mips_n32
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207 , &dc_callvm_argBool_mips_n32
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208 , &dc_callvm_argChar_mips_n32
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209 , &dc_callvm_argShort_mips_n32
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210 , &dc_callvm_argInt_mips_n32
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211 , &dc_callvm_argLong_mips_n32
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212 , &dc_callvm_argLongLong_mips_n32
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213 , &dc_callvm_argFloat_mips_n32_ellipsis
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214 , &dc_callvm_argDouble_mips_n32_ellipsis
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215 , &dc_callvm_argPointer_mips_n32
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216 , NULL /* argStruct */
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217 , (DCvoidvmfunc*) &dc_callvm_call_mips_n32
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218 , (DCboolvmfunc*) &dc_callvm_call_mips_n32
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219 , (DCcharvmfunc*) &dc_callvm_call_mips_n32
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220 , (DCshortvmfunc*) &dc_callvm_call_mips_n32
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221 , (DCintvmfunc*) &dc_callvm_call_mips_n32
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222 , (DClongvmfunc*) &dc_callvm_call_mips_n32
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223 , (DClonglongvmfunc*) &dc_callvm_call_mips_n32
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224 , (DCfloatvmfunc*) &dc_callvm_call_mips_n32
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225 , (DCdoublevmfunc*) &dc_callvm_call_mips_n32
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226 , (DCpointervmfunc*) &dc_callvm_call_mips_n32
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227 , NULL /* callStruct */
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228 };
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229
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84
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230 static void dc_callvm_mode_mips_n32(DCCallVM* in_self, DCint mode)
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0
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231 {
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232 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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233 DCCallVM_vt* vt;
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234
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235 switch(mode) {
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236 case DC_CALL_C_DEFAULT:
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84
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237 case DC_CALL_C_MIPS64_N32:
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238 vt = &gVT_mips_n32;
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0
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239 break;
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240 case DC_CALL_C_ELLIPSIS:
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84
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241 case DC_CALL_C_ELLIPSIS_VARARGS:
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242 vt = &gVT_mips_n32_ellipsis;
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0
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243 break;
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244 default:
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245 self->mInterface.mError = DC_ERROR_UNSUPPORTED_MODE;
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246 return;
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0
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247 }
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84
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248 dc_callvm_base_init(&self->mInterface, vt);
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0
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249 }
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250
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84
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251 /* Public API. */
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252 DCCallVM* dcNewCallVM(DCsize size)
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253 {
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84
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254 DCCallVM_mips_n32* p = (DCCallVM_mips_n32*)dcAllocMem(sizeof(DCCallVM_mips_n32)+size);
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255
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256 dc_callvm_mode_mips_n32((DCCallVM*)p, DC_CALL_C_DEFAULT);
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257
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258 dcVecInit(&p->mVecHead, size);
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259 dc_callvm_reset_mips_n32((DCCallVM*)p);
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260
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261 return (DCCallVM*)p;
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0
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262 }
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263
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