diff options
Diffstat (limited to 'src/pkg/runtime/memclr_plan9_386.s')
| -rw-r--r-- | src/pkg/runtime/memclr_plan9_386.s | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/pkg/runtime/memclr_plan9_386.s b/src/pkg/runtime/memclr_plan9_386.s new file mode 100644 index 000000000..9b496785a --- /dev/null +++ b/src/pkg/runtime/memclr_plan9_386.s @@ -0,0 +1,50 @@ +// 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. + +#include "../../cmd/ld/textflag.h" + +// void runtime·memclr(void*, uintptr) +TEXT runtime·memclr(SB), NOSPLIT, $0-8 + MOVL ptr+0(FP), DI + MOVL n+4(FP), BX + XORL AX, AX + +clr_tail: + TESTL BX, BX + JEQ clr_0 + CMPL BX, $2 + JBE clr_1or2 + CMPL BX, $4 + JBE clr_3or4 + CMPL BX, $8 + JBE clr_5through8 + CMPL BX, $16 + JBE clr_9through16 + MOVL BX, CX + SHRL $2, CX + REP + STOSL + ANDL $3, BX + JNE clr_tail + RET + +clr_1or2: + MOVB AX, (DI) + MOVB AX, -1(DI)(BX*1) +clr_0: + RET +clr_3or4: + MOVW AX, (DI) + MOVW AX, -2(DI)(BX*1) + RET +clr_5through8: + MOVL AX, (DI) + MOVL AX, -4(DI)(BX*1) + RET +clr_9through16: + MOVL AX, (DI) + MOVL AX, 4(DI) + MOVL AX, -8(DI)(BX*1) + MOVL AX, -4(DI)(BX*1) + RET |