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comparison dyncallback/dyncall_args_arm32_arm.c @ 0:3e629dc19168

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initial from svn dyncall-1745
author Daniel Adler
date Thu, 19 Mar 2015 22:24:28 +0100
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children fb416abb2059
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-1:000000000000 0:3e629dc19168
1 /*
2
3 Package: dyncall
4 Library: dyncallback
5 File: dyncallback/dyncall_args_arm32_arm.c
6 Description: Callback's Arguments VM - Implementation for ARM32 (ARM mode)
7 License:
8
9 Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>,
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
28 #include "dyncall_args_arm32_arm.h"
29
30
31 static void arm_align_64(DCArgs* args)
32 {
33 /* Look at signature to see if current calling convention needs alignment */
34 /* or not (e.g. EABI has different alignment). If nothing specified, fall */
35 /* back to default behaviour for this platform. */
36 /* @@@ check signature string */
37
38 int sig =
39 #if defined(DC__ABI_ARM_EABI)
40 0; /* EABI */
41 #else
42 1; /* ATPCS */
43 #endif
44 if(sig == 0) {
45 if(args->reg_count < 4)
46 args->reg_count = (args->reg_count+1)&~1;
47 if(args->reg_count >= 4 && (int)args->stack_ptr & 4)
48 ++args->stack_ptr;
49 }
50 }
51
52
53 static void* arm_word(DCArgs* args)
54 {
55 if(args->reg_count < 4)
56 return &args->reg_data[args->reg_count++];
57 else
58 return (void*)args->stack_ptr++;
59 }
60
61
62 static DCdouble arm_double(DCArgs* args)
63 {
64 union {
65 DCdouble d;
66 DClong l[2];
67 } d;
68 arm_align_64(args);
69 d.l[0] = *(DClong*)arm_word(args);
70 d.l[1] = *(DClong*)arm_word(args);
71 return d.d;
72 }
73
74
75 static DClonglong arm_longlong(DCArgs* args)
76 {
77 union {
78 DClonglong ll;
79 DClong l[2];
80 } ll;
81 arm_align_64(args);
82 ll.l[0] = *(DClong*)arm_word(args);
83 ll.l[1] = *(DClong*)arm_word(args);
84 return ll.ll;
85 }
86
87
88
89 // ----------------------------------------------------------------------------
90 // C API implementation:
91
92
93 // base operations:
94
95 DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); }
96 DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); }
97 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); }
98 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); }
99 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); }
100 DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; }
101
102 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
103 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
104 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
105 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
106 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); }
107
108
109 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); }
110
111 DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); }
112 DCfloat dcbArgFloat (DCArgs* p) { return *(DCfloat*) arm_word(p); }
113