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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_arm32_arm.c
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6 Description: Callback's Arguments VM - Implementation for ARM32 (ARM mode)
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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 #include "dyncall_args_arm32_arm.h"
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29
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30
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31 static void arm_align_64(DCArgs* args)
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32 {
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33 /* Look at signature to see if current calling convention needs alignment */
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34 /* or not (e.g. EABI has different alignment). If nothing specified, fall */
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35 /* back to default behaviour for this platform. */
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36 /* @@@ check signature string */
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37
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38 int sig =
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39 #if defined(DC__ABI_ARM_EABI)
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40 0; /* EABI */
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41 #else
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42 1; /* ATPCS */
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43 #endif
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44 if(sig == 0) {
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45 if(args->reg_count < 4)
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46 args->reg_count = (args->reg_count+1)&~1;
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47 if(args->reg_count >= 4 && (int)args->stack_ptr & 4)
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48 ++args->stack_ptr;
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49 }
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50 }
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51
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52
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53 static void* arm_word(DCArgs* args)
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54 {
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55 if(args->reg_count < 4)
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56 return &args->reg_data[args->reg_count++];
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57 else
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58 return (void*)args->stack_ptr++;
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59 }
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60
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38
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61 static DCfloat arm_float(DCArgs* args)
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62 {
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63 #if defined(DC__ABI_ARM_HF)
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64 DCfloat f;
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65 if(args->freg_count < 16) {
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66 f = args->f[args->freg_count++];
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67
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68 /* if freg_count was odd, sync with dreg_count */
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69 if(!(args->freg_count & 1) && (args->freg_count < args->dreg_count))
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70 args->freg_count = args->dreg_count;
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71
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72 return f;
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73 }
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74 #endif
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75 return *(DCfloat*)arm_word(args);
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76 }
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0
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77
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78 static DCdouble arm_double(DCArgs* args)
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79 {
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80 union {
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81 DCdouble d;
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82 DClong l[2];
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83 } d;
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38
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84 #if defined(DC__ABI_ARM_HF)
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85 if(args->dreg_count < args->freg_count)
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86 args->dreg_count = (args->freg_count+1)&0x1e; /* clear last bit, counter won't be higher than 16, anyways */
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87
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88 if(args->dreg_count < 16) {
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89 d.d = *(DCdouble*)&args->f[args->dreg_count];
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90 args->dreg_count += 2;
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91
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92 /* freg_count is either odd (pointing to a gap), or always the same as dreg_count */
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93 if(!(args->freg_count & 1))
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94 args->freg_count = args->dreg_count;
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95 return d.d;
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96 }
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97 #endif
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0
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98 arm_align_64(args);
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99 d.l[0] = *(DClong*)arm_word(args);
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100 d.l[1] = *(DClong*)arm_word(args);
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101 return d.d;
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102 }
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103
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104 static DClonglong arm_longlong(DCArgs* args)
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105 {
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106 union {
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107 DClonglong ll;
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108 DClong l[2];
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109 } ll;
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110 arm_align_64(args);
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111 ll.l[0] = *(DClong*)arm_word(args);
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112 ll.l[1] = *(DClong*)arm_word(args);
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113 return ll.ll;
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114 }
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115
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116
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117
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118 // ----------------------------------------------------------------------------
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119 // C API implementation:
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120
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121
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122 // base operations:
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123
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124 DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); }
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125 DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); }
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126 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); }
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127 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); }
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128 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); }
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129 DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; }
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130
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131 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
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132 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
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133 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
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134 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
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135 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); }
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136
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137
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138 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); }
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139
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140 DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); }
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38
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141 DCfloat dcbArgFloat (DCArgs* p) { return arm_float(p); }
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142
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