diff options
| author | Yao Zhang <lunaria21@gmail.com> | 2015-09-10 11:25:58 -0400 |
|---|---|---|
| committer | Minux Ma <minux@golang.org> | 2015-11-12 04:46:17 +0000 |
| commit | 424738e43ec3c775f7d0c36a90791eaca5dd85d1 (patch) | |
| tree | e2018a202e7a1c028b350f798939992441eab068 /src/runtime/memclr_mips64x.s | |
| parent | b4501ac4a59d78f59b92f00cc4ba1e364298a44d (diff) | |
| download | go-424738e43ec3c775f7d0c36a90791eaca5dd85d1.tar.gz go-424738e43ec3c775f7d0c36a90791eaca5dd85d1.zip | |
runtime: added assembly part of linux/mips64{,le} support
Change-Id: I9e94027ef66c88007107de2b2b75c3d7cf1352af
Reviewed-on: https://go-review.googlesource.com/14467
Reviewed-by: Minux Ma <minux@golang.org>
Diffstat (limited to 'src/runtime/memclr_mips64x.s')
| -rw-r--r-- | src/runtime/memclr_mips64x.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/runtime/memclr_mips64x.s b/src/runtime/memclr_mips64x.s new file mode 100644 index 0000000000..30a4af3c94 --- /dev/null +++ b/src/runtime/memclr_mips64x.s @@ -0,0 +1,42 @@ +// Copyright 2015 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 mips64 mips64le + +#include "textflag.h" + +// void runtime·memclr(void*, uintptr) +TEXT runtime·memclr(SB),NOSPLIT,$0-16 + MOVV ptr+0(FP), R1 + MOVV n+8(FP), R2 + ADDV R1, R2, R4 + + // if less than 8 bytes, do one byte at a time + SGTU $8, R2, R3 + BNE R3, out + + // do one byte at a time until 8-aligned + AND $7, R1, R3 + BEQ R3, words + MOVB R0, (R1) + ADDV $1, R1 + JMP -4(PC) + +words: + // do 8 bytes at a time if there is room + ADDV $-7, R4, R2 + + SGTU R2, R1, R3 + BEQ R3, out + MOVV R0, (R1) + ADDV $8, R1 + JMP -4(PC) + +out: + BEQ R1, R4, done + MOVB R0, (R1) + ADDV $1, R1 + JMP -3(PC) +done: + RET |