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| author | Russ Cox <rsc@golang.org> | 2014-10-29 11:45:01 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2014-10-29 11:45:01 -0400 |
| commit | cc517ca5f7183e7f5d91bf75897b23cc0f4ed04f (patch) | |
| tree | de12ff4332f39303ab2a6dbfa735071249ea1188 /src/runtime/memmove_power64x.s | |
| parent | 7d8c40f1a65329094210933bca66b8862b0c28b8 (diff) | |
| parent | 05d42f8a61328aa7ea55887f601286b597caf0da (diff) | |
| download | go-cc517ca5f7183e7f5d91bf75897b23cc0f4ed04f.tar.gz | |
[dev.power64] all: merge default (dd5014ed9b01) into dev.power64
Still passes on amd64.
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/165110043
Diffstat (limited to 'src/runtime/memmove_power64x.s')
| -rw-r--r-- | src/runtime/memmove_power64x.s | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/runtime/memmove_power64x.s b/src/runtime/memmove_power64x.s new file mode 100644 index 000000000..2b04d8319 --- /dev/null +++ b/src/runtime/memmove_power64x.s @@ -0,0 +1,40 @@ +// Copyright 2014 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. + +// +build power64 power64le + +#include "textflag.h" + +// void runtime·memmove(void*, void*, uintptr) +TEXT runtime·memmove(SB), NOSPLIT, $-8-24 + MOVD to+0(FP), R3 + MOVD from+8(FP), R4 + MOVD n+16(FP), R5 + CMP R5, $0 + BNE check + RETURN + +check: + CMP R3, R4 + BGT backward + + SUB $1, R3 + ADD R3, R5 + SUB $1, R4 +loop: + MOVBU 1(R4), R6 + MOVBU R6, 1(R3) + CMP R3, R5 + BNE loop + RETURN + +backward: + ADD R5, R4 + ADD R3, R5 +loop1: + MOVBU -1(R4), R6 + MOVBU R6, -1(R5) + CMP R3, R5 + BNE loop1 + RETURN |