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1 /*
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2
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3 Package: dyncall
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4 Library: dyncallback
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5 File: dyncallback/dyncall_args_x86.c
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6 Description: Callback's Arguments VM - Implementation for x86
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7 License:
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8
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281
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9 Copyright (c) 2007-2018 Daniel Adler <dadler@uni-goettingen.de>,
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0
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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 #include "dyncall_args_x86.h"
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28
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29 /* ---------------------------------------------------------------------------- */
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30 /* C API implementation: */
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31
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32 /* base operations */
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33
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34 DCint dcbArgInt (DCArgs* p) { return p->vt->i32(p); }
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35 DClonglong dcbArgLongLong(DCArgs* p) { return p->vt->i64(p); }
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36 DCfloat dcbArgFloat (DCArgs* p) { return p->vt->f32(p); }
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37 DCdouble dcbArgDouble (DCArgs* p) { return p->vt->f64(p); }
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38
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39 /* promote to integer: bool, char, short, long and pointer */
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40
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41 DCbool dcbArgBool (DCArgs* p) { return ( dcbArgInt(p) == 0 ) ? 0 : 1; }
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42 DCchar dcbArgChar (DCArgs* p) { return (char) dcbArgInt(p); }
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43 DCshort dcbArgShort (DCArgs* p) { return (short) dcbArgInt(p); }
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44 DClong dcbArgLong (DCArgs* p) { return (long) dcbArgInt(p); }
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45 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgInt(p); }
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46
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47 /* unsigned types */
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48
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49 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
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50 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
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51 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
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52 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
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53 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong) dcbArgLongLong(p); }
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54
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55 /* ---------------------------------------------------------------------------- */
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56 /* virtual tables: */
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57
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58 /* cdecl calling convention */
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59
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60 static int default_i32(DCArgs* args)
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61 {
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62 return *args->stack_ptr++;
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63 }
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64
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65 static long long default_i64(DCArgs* args)
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66 {
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67 long long result = * (long long*) args->stack_ptr;
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68 args->stack_ptr += 2;
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69 return result;
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70 }
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71
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72 static float default_f32(DCArgs* args)
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73 {
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74 float result = * ( (float*) args->stack_ptr );
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75 args->stack_ptr++;
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76 return result;
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77 }
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78
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79 static double default_f64(DCArgs* args)
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80 {
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81 double result = * ( (double*) args->stack_ptr );
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82 args->stack_ptr += 2;
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83 return result;
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84 }
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85
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86 DCArgsVT dcArgsVT_default = { default_i32, default_i64, default_f32, default_f64 };
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87
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88 /* thiscall (microsoft) calling convention */
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89
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90 static int this_i32(DCArgs* args)
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91 {
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92 if(args->fast_data[0]) { /* ecx register = this pointer */
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93 int thisArg = args->fast_data[0];
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94 args->fast_data[0] = 0;
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95 return thisArg;
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96 }
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97 return *args->stack_ptr++;
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98 }
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99
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100 DCArgsVT dcArgsVT_this_ms = { this_i32, default_i64, default_f32, default_f64 };
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101
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102 /* fastcall (microsoft) calling convention */
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103
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104 static int fast_i32(DCArgs* args)
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105 {
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106 if(args->fast_count < 2)
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107 return args->fast_data[args->fast_count++];
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108 else
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109 return default_i32(args);
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110 }
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111
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112 DCArgsVT dcArgsVT_fast_ms = { fast_i32, default_i64, default_f32, default_f64 };
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113
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114 /* fastcall (gnu) calling convention */
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115
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116 static long long fast_gnu_i64(DCArgs* args)
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117 {
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118 args->fast_count += 2;
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119 return default_i64(args);
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120 }
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121
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122 DCArgsVT dcArgsVT_fast_gnu = { fast_i32, fast_gnu_i64, default_f32, default_f64 };
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