github.com/bir3/gocompiler@v0.9.2202/src/cmd/cgo/internal/test/issue9400/asm_ppc64x.s (about)

     1  // Copyright 2014 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 (ppc64 || ppc64le) && gc
     6  
     7  #include "textflag.h"
     8  
     9  TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
    10  	// Rewind stack pointer so anything that happens on the stack
    11  	// will clobber the test pattern created by the caller
    12  	ADD	$(1024 * 8), R1
    13  
    14  	// Ask signaller to setgid
    15  	MOVW	$1, R3
    16  	SYNC
    17  	MOVW	R3, ·Baton(SB)
    18  
    19  	// Wait for setgid completion
    20  loop:
    21  	SYNC
    22  	MOVW	·Baton(SB), R3
    23  	CMP	R3, $0
    24  	// Hint that we're in a spin loop
    25  	OR	R1, R1, R1
    26  	BNE	loop
    27  	ISYNC
    28  
    29  	// Restore stack
    30  	SUB	$(1024 * 8), R1
    31  	RET