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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
| commit | ccd992355df7192993c666236047820244914598 (patch) | |
| tree | f00fea65147227b7743083c6148396f74cd66935 /src/runtime/memclr_loong64.s | |
| parent | Initial commit. (diff) | |
| download | golang-1.21-ccd992355df7192993c666236047820244914598.tar.xz golang-1.21-ccd992355df7192993c666236047820244914598.zip | |
Adding upstream version 1.21.8.upstream/1.21.8
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/memclr_loong64.s')
| -rw-r--r-- | src/runtime/memclr_loong64.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/runtime/memclr_loong64.s b/src/runtime/memclr_loong64.s new file mode 100644 index 0000000..7bb6f3d --- /dev/null +++ b/src/runtime/memclr_loong64.s @@ -0,0 +1,42 @@ +// Copyright 2022 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. + +#include "go_asm.h" +#include "textflag.h" + +// func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr) +TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16 + MOVV ptr+0(FP), R6 + MOVV n+8(FP), R7 + ADDV R6, R7, R4 + + // if less than 8 bytes, do one byte at a time + SGTU $8, R7, R8 + BNE R8, out + + // do one byte at a time until 8-aligned + AND $7, R6, R8 + BEQ R8, words + MOVB R0, (R6) + ADDV $1, R6 + JMP -4(PC) + +words: + // do 8 bytes at a time if there is room + ADDV $-7, R4, R7 + + PCALIGN $16 + SGTU R7, R6, R8 + BEQ R8, out + MOVV R0, (R6) + ADDV $8, R6 + JMP -4(PC) + +out: + BEQ R6, R4, done + MOVB R0, (R6) + ADDV $1, R6 + JMP -3(PC) +done: + RET |