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| // Copyright 2016 The Go Authors. All rights reserved.
| // Use of this source code is governed by a BSD-style
| // license that can be found in the LICENSE file.
|
| #include "textflag.h"
|
| // Called by C code generated by cmd/cgo.
| // func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr)
| // Saves C callee-saved registers and calls fn with three arguments.
| TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
| // Start with standard C stack frame layout and linkage.
|
| // Save R6-R15 in the register save area of the calling function.
| STMG R6, R15, 48(R15)
|
| // Allocate 96 bytes on the stack.
| MOVD $-96(R15), R15
|
| // Save F8-F15 in our stack frame.
| FMOVD F8, 32(R15)
| FMOVD F9, 40(R15)
| FMOVD F10, 48(R15)
| FMOVD F11, 56(R15)
| FMOVD F12, 64(R15)
| FMOVD F13, 72(R15)
| FMOVD F14, 80(R15)
| FMOVD F15, 88(R15)
|
| // Initialize Go ABI environment.
| BL runtime·load_g(SB)
|
| MOVD R3, 8(R15) // arg1
| MOVW R4, 16(R15) // arg2
| MOVD R5, 24(R15) // arg3
| BL (R2) // fn(arg1, arg2, arg3)
|
| FMOVD 32(R15), F8
| FMOVD 40(R15), F9
| FMOVD 48(R15), F10
| FMOVD 56(R15), F11
| FMOVD 64(R15), F12
| FMOVD 72(R15), F13
| FMOVD 80(R15), F14
| FMOVD 88(R15), F15
|
| // De-allocate stack frame.
| MOVD $96(R15), R15
|
| // Restore R6-R15.
| LMG 48(R15), R6, R15
|
| RET
|
|
