Mercurial > pub > dyncall > dyncall
annotate dyncallback/dyncall_args_arm32.c @ 663:127b569978cc default tip
- another tweak handling clang trying to be too smart (see last commit)
| author | Tassilo Philipp |
|---|---|
| date | Sun, 24 Mar 2024 13:52:44 +0100 |
| parents | 93ce63d72d59 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 2 | |
| 3 Package: dyncall | |
| 4 Library: dyncallback | |
| 143 | 5 File: dyncallback/dyncall_args_arm32.c |
| 6 Description: Callback's Arguments VM - Implementation for ARM32 (ARM and THUMB mode) | |
| 0 | 7 License: |
| 8 | |
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9 Copyright (c) 2007-2024 Daniel Adler <dadler@uni-goettingen.de>, |
| 0 | 10 Tassilo Philipp <tphilipp@potion-studios.com> |
| 11 | |
| 12 Permission to use, copy, modify, and distribute this software for any | |
| 13 purpose with or without fee is hereby granted, provided that the above | |
| 14 copyright notice and this permission notice appear in all copies. | |
| 15 | |
| 16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 23 | |
| 24 */ | |
| 25 | |
| 26 | |
| 27 | |
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28 #include "dyncall_args.h" |
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29 |
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30 struct DCArgs |
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31 { |
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32 /* Don't change order! */ |
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33 long reg_data[4]; |
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34 int reg_count; |
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35 long* stack_ptr; |
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36 #if defined(DC__ABI_ARM_HF) |
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37 DCfloat f[16]; |
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38 int freg_count; |
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39 int dreg_count; |
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40 #endif |
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41 }; |
| 0 | 42 |
| 43 | |
| 44 static void arm_align_64(DCArgs* args) | |
| 45 { | |
| 46 /* Look at signature to see if current calling convention needs alignment */ | |
| 47 /* or not (e.g. EABI has different alignment). If nothing specified, fall */ | |
| 48 /* back to default behaviour for this platform. */ | |
| 49 /* @@@ check signature string */ | |
| 50 | |
| 51 int sig = | |
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52 #if defined(DC__ABI_ARM_EABI) || defined(DC__ABI_ARM_HF) |
| 0 | 53 0; /* EABI */ |
| 54 #else | |
| 55 1; /* ATPCS */ | |
| 56 #endif | |
| 57 if(sig == 0) { | |
| 58 if(args->reg_count < 4) | |
| 59 args->reg_count = (args->reg_count+1)&~1; | |
| 60 if(args->reg_count >= 4 && (int)args->stack_ptr & 4) | |
| 61 ++args->stack_ptr; | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 | |
| 66 static void* arm_word(DCArgs* args) | |
| 67 { | |
| 68 if(args->reg_count < 4) | |
| 69 return &args->reg_data[args->reg_count++]; | |
| 70 else | |
| 71 return (void*)args->stack_ptr++; | |
| 72 } | |
| 73 | |
| 38 | 74 static DCfloat arm_float(DCArgs* args) |
| 75 { | |
| 76 #if defined(DC__ABI_ARM_HF) | |
| 77 DCfloat f; | |
| 78 if(args->freg_count < 16) { | |
| 79 f = args->f[args->freg_count++]; | |
| 80 | |
| 81 /* if freg_count was odd, sync with dreg_count */ | |
| 82 if(!(args->freg_count & 1) && (args->freg_count < args->dreg_count)) | |
| 83 args->freg_count = args->dreg_count; | |
| 84 | |
| 85 return f; | |
| 86 } | |
| 87 #endif | |
| 88 return *(DCfloat*)arm_word(args); | |
| 89 } | |
| 0 | 90 |
| 91 static DCdouble arm_double(DCArgs* args) | |
| 92 { | |
| 93 union { | |
| 94 DCdouble d; | |
| 95 DClong l[2]; | |
| 96 } d; | |
| 38 | 97 #if defined(DC__ABI_ARM_HF) |
| 98 if(args->dreg_count < args->freg_count) | |
| 99 args->dreg_count = (args->freg_count+1)&0x1e; /* clear last bit, counter won't be higher than 16, anyways */ | |
| 100 | |
| 101 if(args->dreg_count < 16) { | |
| 102 d.d = *(DCdouble*)&args->f[args->dreg_count]; | |
| 103 args->dreg_count += 2; | |
| 104 | |
| 105 /* freg_count is either odd (pointing to a gap), or always the same as dreg_count */ | |
| 106 if(!(args->freg_count & 1)) | |
| 107 args->freg_count = args->dreg_count; | |
| 108 return d.d; | |
| 109 } | |
| 47 | 110 args->freg_count = 16; /* fp registers all full - need to use stack now: stop filling gaps for single precision, also */ |
| 38 | 111 #endif |
| 0 | 112 arm_align_64(args); |
| 113 d.l[0] = *(DClong*)arm_word(args); | |
| 114 d.l[1] = *(DClong*)arm_word(args); | |
| 115 return d.d; | |
| 116 } | |
| 117 | |
| 118 static DClonglong arm_longlong(DCArgs* args) | |
| 119 { | |
| 120 union { | |
| 121 DClonglong ll; | |
| 122 DClong l[2]; | |
| 123 } ll; | |
| 124 arm_align_64(args); | |
| 125 ll.l[0] = *(DClong*)arm_word(args); | |
| 126 ll.l[1] = *(DClong*)arm_word(args); | |
| 127 return ll.ll; | |
| 128 } | |
| 129 | |
| 130 | |
| 131 DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); } | |
| 132 DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); } | |
| 133 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); } | |
| 134 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); } | |
| 135 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); } | |
| 136 DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; } | |
| 137 | |
| 138 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); } | |
| 139 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); } | |
| 140 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); } | |
| 141 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); } | |
| 142 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); } | |
| 143 | |
| 144 | |
| 145 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); } | |
| 146 | |
| 147 DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); } | |
| 38 | 148 DCfloat dcbArgFloat (DCArgs* p) { return arm_float(p); } |
| 0 | 149 |
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150 DCpointer dcbArgAggr (DCArgs* p, DCpointer target) { /* @@@AGGR not impl */ return NULL; } |
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151 void dcbReturnAggr (DCArgs *args, DCValue *result, DCpointer ret) { /* @@@AGGR not impl */ } |
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152 |