github.com/bir3/gocompiler@v0.9.2202/src/cmd/cgo/internal/test/issue9400/asm_loong64.s (about)

     1  // Copyright 2022 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  TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
     8  	// Rewind stack pointer so anything that happens on the stack
     9  	// will clobber the test pattern created by the caller
    10  	ADDV	$(1024*8), R3
    11  
    12  	// Ask signaller to setgid
    13  	MOVW	$1, R12
    14  	DBAR
    15  	MOVW	R12, ·Baton(SB)
    16  	DBAR
    17  
    18  	// Wait for setgid completion
    19  loop:
    20  	DBAR
    21  	MOVW	·Baton(SB), R12
    22  	OR	R13, R13, R13	// hint that we're in a spin loop
    23  	BNE	R12, loop
    24  	DBAR
    25  
    26  	// Restore stack
    27  	ADDV	$(-1024*8), R3
    28  	RET