Text file src/runtime/cgo/asm_mipsx.s
1 // Copyright 2016 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 // +build mips mipsle
6
7 #include "textflag.h"
8
9 /*
10 * void crosscall2(void (*fn)(void*, int32, uintptr), void*, int32, uintptr)
11 * Save registers and call fn with two arguments.
12 */
13 TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
14 /*
15 * We still need to save all callee save register as before, and then
16 * push 3 args for fn (R5, R6, R7).
17 * Also note that at procedure entry in gc world, 4(R29) will be the
18 * first arg.
19 */
20
21 // Space for 9 caller-saved GPR + LR + 6 caller-saved FPR.
22 // O32 ABI allows us to smash 16 bytes argument area of caller frame.
23 #ifndef GOMIPS_softfloat
24 SUBU $(4*14+8*6-16), R29
25 #else
26 SUBU $(4*14-16), R29 // For soft-float, no FPR.
27 #endif
28 MOVW R5, (4*1)(R29)
29 MOVW R6, (4*2)(R29)
30 MOVW R7, (4*3)(R29)
31 MOVW R16, (4*4)(R29)
32 MOVW R17, (4*5)(R29)
33 MOVW R18, (4*6)(R29)
34 MOVW R19, (4*7)(R29)
35 MOVW R20, (4*8)(R29)
36 MOVW R21, (4*9)(R29)
37 MOVW R22, (4*10)(R29)
38 MOVW R23, (4*11)(R29)
39 MOVW g, (4*12)(R29)
40 MOVW R31, (4*13)(R29)
41 #ifndef GOMIPS_softfloat
42 MOVD F20, (4*14)(R29)
43 MOVD F22, (4*14+8*1)(R29)
44 MOVD F24, (4*14+8*2)(R29)
45 MOVD F26, (4*14+8*3)(R29)
46 MOVD F28, (4*14+8*4)(R29)
47 MOVD F30, (4*14+8*5)(R29)
48 #endif
49 JAL runtime·load_g(SB)
50 JAL (R4)
51
52 MOVW (4*4)(R29), R16
53 MOVW (4*5)(R29), R17
54 MOVW (4*6)(R29), R18
55 MOVW (4*7)(R29), R19
56 MOVW (4*8)(R29), R20
57 MOVW (4*9)(R29), R21
58 MOVW (4*10)(R29), R22
59 MOVW (4*11)(R29), R23
60 MOVW (4*12)(R29), g
61 MOVW (4*13)(R29), R31
62 #ifndef GOMIPS_softfloat
63 MOVD (4*14)(R29), F20
64 MOVD (4*14+8*1)(R29), F22
65 MOVD (4*14+8*2)(R29), F24
66 MOVD (4*14+8*3)(R29), F26
67 MOVD (4*14+8*4)(R29), F28
68 MOVD (4*14+8*5)(R29), F30
69
70 ADDU $(4*14+8*6-16), R29
71 #else
72 ADDU $(4*14-16), R29
73 #endif
74 RET
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