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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 |