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comparison dyncallback/dyncall_args_x86.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 f5577f6bf97a
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-1:000000000000 0:3e629dc19168
1 /*
2
3 Package: dyncall
4 Library: dyncallback
5 File: dyncallback/dyncall_args_x86.c
6 Description: Callback's Arguments VM - Implementation for x86
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 #include "dyncall_args_x86.h"
28
29 /* ---------------------------------------------------------------------------- */
30 /* C API implementation: */
31
32 /* base operations */
33
34 DCint dcbArgInt (DCArgs* p) { return p->vt->i32(p); }
35 DClonglong dcbArgLongLong(DCArgs* p) { return p->vt->i64(p); }
36 DCfloat dcbArgFloat (DCArgs* p) { return p->vt->f32(p); }
37 DCdouble dcbArgDouble (DCArgs* p) { return p->vt->f64(p); }
38
39 /* promote to integer: bool, char, short, long and pointer */
40
41 DCbool dcbArgBool (DCArgs* p) { return ( dcbArgInt(p) == 0 ) ? 0 : 1; }
42 DCchar dcbArgChar (DCArgs* p) { return (char) dcbArgInt(p); }
43 DCshort dcbArgShort (DCArgs* p) { return (short) dcbArgInt(p); }
44 DClong dcbArgLong (DCArgs* p) { return (long) dcbArgInt(p); }
45 DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgInt(p); }
46
47 /* unsigned types */
48
49 DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
50 DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
51 DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
52 DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
53 DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong) dcbArgLongLong(p); }
54
55 /* ---------------------------------------------------------------------------- */
56 /* virtual tables: */
57
58 /* cdecl calling convention */
59
60 static int default_i32(DCArgs* args)
61 {
62 return *args->stack_ptr++;
63 }
64
65 static long long default_i64(DCArgs* args)
66 {
67 long long result = * (long long*) args->stack_ptr;
68 args->stack_ptr += 2;
69 return result;
70 }
71
72 static float default_f32(DCArgs* args)
73 {
74 float result = * ( (float*) args->stack_ptr );
75 args->stack_ptr++;
76 return result;
77 }
78
79 static double default_f64(DCArgs* args)
80 {
81 double result = * ( (double*) args->stack_ptr );
82 args->stack_ptr += 2;
83 return result;
84 }
85
86 DCArgsVT dcArgsVT_default = { default_i32, default_i64, default_f32, default_f64 };
87
88 /* thiscall (microsoft) calling convention */
89
90 static int this_i32(DCArgs* args)
91 {
92 if(args->fast_data[0]) { /* ecx register = this pointer */
93 int thisArg = args->fast_data[0];
94 args->fast_data[0] = 0;
95 return thisArg;
96 }
97 return *args->stack_ptr++;
98 }
99
100 DCArgsVT dcArgsVT_this_ms = { this_i32, default_i64, default_f32, default_f64 };
101
102 /* fastcall (microsoft) calling convention */
103
104 static int fast_i32(DCArgs* args)
105 {
106 if(args->fast_count < 2)
107 return args->fast_data[args->fast_count++];
108 else
109 return default_i32(args);
110 }
111
112 DCArgsVT dcArgsVT_fast_ms = { fast_i32, default_i64, default_f32, default_f64 };
113
114 /* fastcall (gnu) calling convention */
115
116 static long long fast_gnu_i64(DCArgs* args)
117 {
118 args->fast_count += 2;
119 return default_i64(args);
120 }
121
122 DCArgsVT dcArgsVT_fast_gnu = { fast_i32, fast_gnu_i64, default_f32, default_f64 };