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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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61
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62 static DCdouble arm_double(DCArgs* args)
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63 {
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64 union {
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65 DCdouble d;
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66 DClong l[2];
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67 } d;
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68 arm_align_64(args);
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69 d.l[0] = *(DClong*)arm_word(args);
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70 d.l[1] = *(DClong*)arm_word(args);
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71 return d.d;
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72 }
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73
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74
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75 static DClonglong arm_longlong(DCArgs* args)
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76 {
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77 union {
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78 DClonglong ll;
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79 DClong l[2];
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80 } ll;
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81 arm_align_64(args);
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82 ll.l[0] = *(DClong*)arm_word(args);
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83 ll.l[1] = *(DClong*)arm_word(args);
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84 return ll.ll;
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85 }
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86
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87
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88
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89 // ----------------------------------------------------------------------------
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90 // C API implementation:
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91
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92
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93 // base operations:
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94
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95 DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); }
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96 DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); }
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97 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); }
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98 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); }
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99 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); }
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100 DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; }
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101
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102 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
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103 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
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104 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
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105 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
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106 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); }
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107
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108
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109 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); }
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110
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111 DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); }
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112 DCfloat dcbArgFloat (DCArgs* p) { return *(DCfloat*) arm_word(p); }
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113
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