github.com/bir3/gocompiler@v0.9.2202/src/cmd/cgo/internal/test/issue9400/asm_mips64x.s (about)

     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  //go:build (mips64 || mips64le) && gc
     6  
     7  #include "textflag.h"
     8  
     9  #define SYNC	WORD $0xf
    10  
    11  TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
    12  	// Rewind stack pointer so anything that happens on the stack
    13  	// will clobber the test pattern created by the caller
    14  	ADDV	$(1024*8), R29
    15  
    16  	// Ask signaller to setgid
    17  	MOVW	$1, R1
    18  	SYNC
    19  	MOVW	R1, ·Baton(SB)
    20  	SYNC
    21  
    22  	// Wait for setgid completion
    23  loop:
    24  	SYNC
    25  	MOVW	·Baton(SB), R1
    26  	OR	R2, R2, R2	// hint that we're in a spin loop
    27  	BNE	R1, loop
    28  	SYNC
    29  
    30  	// Restore stack
    31  	ADDV	$(-1024*8), R29
    32  	RET