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comparison dyncallback/dyncall_args_arm32.c @ 143:170cde9e2a83

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- arm arm/thumb cleanup, sharing more files, directly
author cslag
date Sat, 20 Aug 2016 11:39:54 +0200
parents dyncallback/dyncall_args_arm32_arm.c@c4de113dc1e9
children f5577f6bf97a
comparison
equal deleted inserted replaced
142:8d6825e3f064 143:170cde9e2a83
1 /*
2
3 Package: dyncall
4 Library: dyncallback
5 File: dyncallback/dyncall_args_arm32.c
6 Description: Callback's Arguments VM - Implementation for ARM32 (ARM and THUMB mode)
7 License:
8
9 Copyright (c) 2007-2016 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.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) || defined(DC__ABI_ARM_HF)
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 static DCfloat arm_float(DCArgs* args)
62 {
63 #if defined(DC__ABI_ARM_HF)
64 DCfloat f;
65 if(args->freg_count < 16) {
66 f = args->f[args->freg_count++];
67
68 /* if freg_count was odd, sync with dreg_count */
69 if(!(args->freg_count & 1) && (args->freg_count < args->dreg_count))
70 args->freg_count = args->dreg_count;
71
72 return f;
73 }
74 #endif
75 return *(DCfloat*)arm_word(args);
76 }
77
78 static DCdouble arm_double(DCArgs* args)
79 {
80 union {
81 DCdouble d;
82 DClong l[2];
83 } d;
84 #if defined(DC__ABI_ARM_HF)
85 if(args->dreg_count < args->freg_count)
86 args->dreg_count = (args->freg_count+1)&0x1e; /* clear last bit, counter won't be higher than 16, anyways */
87
88 if(args->dreg_count < 16) {
89 d.d = *(DCdouble*)&args->f[args->dreg_count];
90 args->dreg_count += 2;
91
92 /* freg_count is either odd (pointing to a gap), or always the same as dreg_count */
93 if(!(args->freg_count & 1))
94 args->freg_count = args->dreg_count;
95 return d.d;
96 }
97 args->freg_count = 16; /* fp registers all full - need to use stack now: stop filling gaps for single precision, also */
98 #endif
99 arm_align_64(args);
100 d.l[0] = *(DClong*)arm_word(args);
101 d.l[1] = *(DClong*)arm_word(args);
102 return d.d;
103 }
104
105 static DClonglong arm_longlong(DCArgs* args)
106 {
107 union {
108 DClonglong ll;
109 DClong l[2];
110 } ll;
111 arm_align_64(args);
112 ll.l[0] = *(DClong*)arm_word(args);
113 ll.l[1] = *(DClong*)arm_word(args);
114 return ll.ll;
115 }
116
117
118
119 // ----------------------------------------------------------------------------
120 // C API implementation:
121
122
123 // base operations:
124
125 DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); }
126 DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); }
127 DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); }
128 DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); }
129 DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); }
130 DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; }
131
132 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
133 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
134 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
135 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
136 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); }
137
138
139 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); }
140
141 DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); }
142 DCfloat dcbArgFloat (DCArgs* p) { return arm_float(p); }
143