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comparison dyncall/dyncall_call_mips_n32_gas.s @ 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 6bd0974d257b
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-1:000000000000 0:3e629dc19168
1 /*
2
3 Package: dyncall
4 Library: dyncall
5 File: dyncall/dyncall_call_mips_n32_gas.s
6 Description: mips "n32" abi call kernel implementation in GNU Assembler
7 License:
8
9 Copyright (c) 2007-2011 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 .section .mdebug.abiN32
27 .previous
28 .abicalls
29 .text
30 .align 2
31 .globl dcCall_mips_n32
32 .ent dcCall_mips_n32
33 dcCall_mips_n32:
34
35 /* Stack-frame prolog */
36
37 .frame $fp,64,$31 /* vars=16, regs=3/0, args=0, extra=16 */
38 .mask 0xd0000000,-8
39 .fmask 0x00000000,0
40 subu $sp,$sp,64
41 sd $31,48($sp) /* save return address register (ra) */
42 sd $30,40($sp) /* save frame pointer register (fp) */
43 sd $28,32($sp) /* save global pointer register (gp) */
44 move $fp,$sp
45
46
47 /* arguments: */
48
49 /* $4 target function */
50 /* $5 register data */
51 /* $6 stack size */
52 /* $7 stack data */
53
54
55 /* allocate argument stack space */
56
57 subu $sp, $sp, $6
58
59 /* copy stack data */
60
61 /* n64 abi call assumptions:
62 - stack data is 16-byte aligned.
63 - no extra-storage for arguments passed via registers.
64 */
65
66 /* $12 source pointer (parameter stack data) */
67 /* $14 destination (stack pointer) */
68 /* $6 byte count */
69
70 move $12, $7
71 move $14, $sp
72
73 .next:
74 beq $6, $0, .skip
75 nop
76 daddiu $6, $6, -8
77 ld $2, 0($12)
78 sd $2, 0($14)
79 daddiu $12,$12, 8
80 daddiu $14,$14, 8
81 b .next
82 .skip:
83 move $25, $4
84
85 /* load registers */
86
87 /* locals: */
88 /* $13 = register data */
89 /* $14 = useDouble flags */
90 move $13, $5
91 ld $14, 128($13)
92
93 /* load integer parameter registers */
94
95 ld $4 , 0($13)
96 ld $5 , 8($13)
97 ld $6 ,16($13)
98 ld $7 ,24($13)
99 ld $8 ,32($13)
100 ld $9 ,40($13)
101 ld $10,48($13)
102 ld $11,56($13)
103
104 /* load float-or-double floating pointer parameter registers
105 a 64-bit bitmask given at byte offset 128 of regdata indicates
106 if loading a float (bit cleared) or double (bit set), starting
107 at bit position 0 in bitmask.
108 */
109 .t0:
110 and $15, $14, 1
111 bgtz $15, .d0
112 .f0:
113 l.s $f12, 64($13)
114 j .t1
115 .d0:
116 l.d $f12, 64($13)
117
118 .t1:
119 and $15, $14, 2
120 bgtz $15, .d1
121 .f1:
122 l.s $f13, 72($13)
123 j .t2
124 .d1:
125 l.d $f13, 72($13)
126 .t2:
127 and $15, $14, 4
128 bgtz $15, .d2
129 .f2:
130 l.s $f14, 80($13)
131 j .t3
132 .d2:
133 l.d $f14, 80($13)
134 .t3:
135 and $15, $14, 8
136 bgtz $15, .d3
137 .f3:
138 l.s $f15, 88($13)
139 j .t4
140 .d3:
141 l.d $f15, 88($13)
142 .t4:
143 and $15, $14, 16
144 bgtz $15, .d4
145 .f4:
146 l.s $f16, 96($13)
147 j .t5
148 .d4:
149 l.d $f16, 96($13)
150 .t5:
151 and $15, $14, 32
152 bgtz $15, .d5
153 .f5:
154 l.s $f17,104($13)
155 j .t6
156 .d5:
157 l.d $f17,104($13)
158 .t6:
159 and $15, $14, 64
160 bgtz $15, .d6
161 .f6:
162 l.s $f18,112($13)
163 j .t7
164 .d6:
165 l.d $f18,112($13)
166 .t7:
167 and $15, $14, 128
168 bgtz $15, .d7
169 .f7:
170 l.s $f19,120($13)
171 j .fregend
172 .d7:
173 l.d $f19,120($13)
174
175 .fregend:
176
177 /* jump-and-link to register $25 */
178
179 jal $31, $25
180
181 /* no nop according to gcc assembly output */
182
183 /* Stack-frame epilog */
184 move $sp,$fp
185 ld $31,48($sp) /* restore ra register */
186 ld $fp,40($sp) /* restore fp register */
187 ld $28,32($sp) /* restore gp register */
188 daddu $sp,$sp,64
189 j $31
190 .end dcCall_mips_n64
191 .size dcCall_mips_n64, .-dcCall_mips_n64
192