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Diffstat (limited to 'src/pkg/runtime/memclr_amd64.s')
-rw-r--r-- | src/pkg/runtime/memclr_amd64.s | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/src/pkg/runtime/memclr_amd64.s b/src/pkg/runtime/memclr_amd64.s deleted file mode 100644 index 6b79363b2..000000000 --- a/src/pkg/runtime/memclr_amd64.s +++ /dev/null @@ -1,116 +0,0 @@ -// 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 !plan9 - -#include "../../cmd/ld/textflag.h" - -// void runtime·memclr(void*, uintptr) -TEXT runtime·memclr(SB), NOSPLIT, $0-16 - MOVQ ptr+0(FP), DI - MOVQ n+8(FP), BX - XORQ AX, AX - - // MOVOU seems always faster than REP STOSQ. -clr_tail: - TESTQ BX, BX - JEQ clr_0 - CMPQ BX, $2 - JBE clr_1or2 - CMPQ BX, $4 - JBE clr_3or4 - CMPQ BX, $8 - JBE clr_5through8 - CMPQ BX, $16 - JBE clr_9through16 - PXOR X0, X0 - CMPQ BX, $32 - JBE clr_17through32 - CMPQ BX, $64 - JBE clr_33through64 - CMPQ BX, $128 - JBE clr_65through128 - CMPQ BX, $256 - JBE clr_129through256 - // TODO: use branch table and BSR to make this just a single dispatch - // TODO: for really big clears, use MOVNTDQ. - -clr_loop: - MOVOU X0, 0(DI) - MOVOU X0, 16(DI) - MOVOU X0, 32(DI) - MOVOU X0, 48(DI) - MOVOU X0, 64(DI) - MOVOU X0, 80(DI) - MOVOU X0, 96(DI) - MOVOU X0, 112(DI) - MOVOU X0, 128(DI) - MOVOU X0, 144(DI) - MOVOU X0, 160(DI) - MOVOU X0, 176(DI) - MOVOU X0, 192(DI) - MOVOU X0, 208(DI) - MOVOU X0, 224(DI) - MOVOU X0, 240(DI) - SUBQ $256, BX - ADDQ $256, DI - CMPQ BX, $256 - JAE clr_loop - JMP clr_tail - -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: - MOVQ AX, (DI) - MOVQ AX, -8(DI)(BX*1) - RET -clr_17through32: - MOVOU X0, (DI) - MOVOU X0, -16(DI)(BX*1) - RET -clr_33through64: - MOVOU X0, (DI) - MOVOU X0, 16(DI) - MOVOU X0, -32(DI)(BX*1) - MOVOU X0, -16(DI)(BX*1) - RET -clr_65through128: - MOVOU X0, (DI) - MOVOU X0, 16(DI) - MOVOU X0, 32(DI) - MOVOU X0, 48(DI) - MOVOU X0, -64(DI)(BX*1) - MOVOU X0, -48(DI)(BX*1) - MOVOU X0, -32(DI)(BX*1) - MOVOU X0, -16(DI)(BX*1) - RET -clr_129through256: - MOVOU X0, (DI) - MOVOU X0, 16(DI) - MOVOU X0, 32(DI) - MOVOU X0, 48(DI) - MOVOU X0, 64(DI) - MOVOU X0, 80(DI) - MOVOU X0, 96(DI) - MOVOU X0, 112(DI) - MOVOU X0, -128(DI)(BX*1) - MOVOU X0, -112(DI)(BX*1) - MOVOU X0, -96(DI)(BX*1) - MOVOU X0, -80(DI)(BX*1) - MOVOU X0, -64(DI)(BX*1) - MOVOU X0, -48(DI)(BX*1) - MOVOU X0, -32(DI)(BX*1) - MOVOU X0, -16(DI)(BX*1) - RET |