diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:25:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:25:22 +0000 |
| commit | f6ad4dcef54c5ce997a4bad5a6d86de229015700 (patch) | |
| tree | 7cfa4e31ace5c2bd95c72b154d15af494b2bcbef /src/runtime/memclr_loong64.s | |
| parent | Initial commit. (diff) | |
| download | golang-1.22-f6ad4dcef54c5ce997a4bad5a6d86de229015700.tar.xz golang-1.22-f6ad4dcef54c5ce997a4bad5a6d86de229015700.zip | |
Adding upstream version 1.22.1.upstream/1.22.1
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 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/runtime/memclr_loong64.s b/src/runtime/memclr_loong64.s new file mode 100644 index 0000000..313e4d4 --- /dev/null +++ b/src/runtime/memclr_loong64.s @@ -0,0 +1,44 @@ +// 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<ABIInternal>(SB),NOSPLIT,$0-16 +#ifndef GOEXPERIMENT_regabiargs + MOVV ptr+0(FP), R4 + MOVV n+8(FP), R5 +#endif + ADDV R4, R5, R6 + + // if less than 8 bytes, do one byte at a time + SGTU $8, R5, R8 + BNE R8, out + + // do one byte at a time until 8-aligned + AND $7, R4, R8 + BEQ R8, words + MOVB R0, (R4) + ADDV $1, R4 + JMP -4(PC) + +words: + // do 8 bytes at a time if there is room + ADDV $-7, R6, R5 + + PCALIGN $16 + SGTU R5, R4, R8 + BEQ R8, out + MOVV R0, (R4) + ADDV $8, R4 + JMP -4(PC) + +out: + BEQ R4, R6, done + MOVB R0, (R4) + ADDV $1, R4 + JMP -3(PC) +done: + RET |