Text file src/pkg/runtime/cgo/asm_amd64.s
1 // Copyright 2009 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 #include "textflag.h"
6
7 // Called by C code generated by cmd/cgo.
8 // func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr)
9 // Saves C callee-saved registers and calls fn with three arguments.
10 #ifndef GOOS_windows
11 TEXT crosscall2(SB),NOSPLIT,$0x50-0 /* keeps stack pointer 32-byte aligned */
12 #else
13 TEXT crosscall2(SB),NOSPLIT,$0x110-0 /* also need to save xmm6 - xmm15 */
14 #endif
15 MOVQ BX, 0x18(SP)
16 MOVQ R12, 0x28(SP)
17 MOVQ R13, 0x30(SP)
18 MOVQ R14, 0x38(SP)
19 MOVQ R15, 0x40(SP)
20
21 #ifdef GOOS_windows
22 // Win64 save RBX, RBP, RDI, RSI, RSP, R12, R13, R14, R15 and XMM6 -- XMM15.
23 MOVQ DI, 0x48(SP)
24 MOVQ SI, 0x50(SP)
25 MOVUPS X6, 0x60(SP)
26 MOVUPS X7, 0x70(SP)
27 MOVUPS X8, 0x80(SP)
28 MOVUPS X9, 0x90(SP)
29 MOVUPS X10, 0xa0(SP)
30 MOVUPS X11, 0xb0(SP)
31 MOVUPS X12, 0xc0(SP)
32 MOVUPS X13, 0xd0(SP)
33 MOVUPS X14, 0xe0(SP)
34 MOVUPS X15, 0xf0(SP)
35
36 MOVQ DX, 0x0(SP) /* arg */
37 MOVQ R8, 0x8(SP) /* argsize (includes padding) */
38 MOVQ R9, 0x10(SP) /* ctxt */
39
40 CALL CX /* fn */
41
42 MOVQ 0x48(SP), DI
43 MOVQ 0x50(SP), SI
44 MOVUPS 0x60(SP), X6
45 MOVUPS 0x70(SP), X7
46 MOVUPS 0x80(SP), X8
47 MOVUPS 0x90(SP), X9
48 MOVUPS 0xa0(SP), X10
49 MOVUPS 0xb0(SP), X11
50 MOVUPS 0xc0(SP), X12
51 MOVUPS 0xd0(SP), X13
52 MOVUPS 0xe0(SP), X14
53 MOVUPS 0xf0(SP), X15
54 #else
55 MOVQ SI, 0x0(SP) /* arg */
56 MOVQ DX, 0x8(SP) /* argsize (includes padding) */
57 MOVQ CX, 0x10(SP) /* ctxt */
58
59 CALL DI /* fn */
60 #endif
61
62 MOVQ 0x18(SP), BX
63 MOVQ 0x28(SP), R12
64 MOVQ 0x30(SP), R13
65 MOVQ 0x38(SP), R14
66 MOVQ 0x40(SP), R15
67
68 RET
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