Gecko [ 167.86.127.34 ]

Name	Size	Permission
bytealg.go	664 B	-rw-r--r--
compare_386.s	2.65 KB	-rw-r--r--
compare_amd64.s	4.13 KB	-rw-r--r--
compare_arm.s	1.75 KB	-rw-r--r--
compare_arm64.s	2.15 KB	-rw-r--r--
compare_generic.go	994 B	-rw-r--r--
compare_mips64x.s	1.66 KB	-rw-r--r--
compare_mipsx.s	1.39 KB	-rw-r--r--
compare_native.go	590 B	-rw-r--r--
compare_ppc64x.s	6.56 KB	-rw-r--r--
compare_s390x.s	1.19 KB	-rw-r--r--
compare_wasm.s	1.44 KB	-rw-r--r--
count_amd64.s	3.96 KB	-rw-r--r--
count_arm.s	917 B	-rw-r--r--
count_arm64.s	2.02 KB	-rw-r--r--
count_generic.go	460 B	-rw-r--r--
count_native.go	616 B	-rw-r--r--
count_ppc64x.s	2.71 KB	-rw-r--r--
count_s390x.s	5.38 KB	-rw-r--r--
equal_386.s	2.16 KB	-rw-r--r--
equal_amd64.s	2.52 KB	-rw-r--r--
equal_arm.s	1.81 KB	-rw-r--r--
equal_arm64.s	2.64 KB	-rw-r--r--
equal_generic.go	628 B	-rw-r--r--
equal_mips64x.s	1.02 KB	-rw-r--r--
equal_mipsx.s	1.07 KB	-rw-r--r--
equal_native.go	789 B	-rw-r--r--
equal_ppc64x.s	2.33 KB	-rw-r--r--
equal_riscv64.s	963 B	-rw-r--r--
equal_s390x.s	1.77 KB	-rw-r--r--
equal_wasm.s	1.1 KB	-rw-r--r--
index_amd64.go	617 B	-rw-r--r--
index_amd64.s	5 KB	-rw-r--r--
index_arm64.go	706 B	-rw-r--r--
index_arm64.s	3.91 KB	-rw-r--r--
index_generic.go	872 B	-rw-r--r--
index_native.go	559 B	-rw-r--r--
index_s390x.go	1011 B	-rw-r--r--
index_s390x.s	5.5 KB	-rw-r--r--
indexbyte_386.s	647 B	-rw-r--r--
indexbyte_amd64.s	3.07 KB	-rw-r--r--
indexbyte_arm.s	951 B	-rw-r--r--
indexbyte_arm64.s	3.33 KB	-rw-r--r--
indexbyte_generic.go	516 B	-rw-r--r--
indexbyte_mips64x.s	981 B	-rw-r--r--
indexbyte_mipsx.s	1008 B	-rw-r--r--
indexbyte_native.go	378 B	-rw-r--r--
indexbyte_ppc64x.s	7.78 KB	-rw-r--r--
indexbyte_riscv64.s	934 B	-rw-r--r--
indexbyte_s390x.s	2.49 KB	-rw-r--r--
indexbyte_wasm.s	2.54 KB	-rw-r--r--

Code Editor : indexbyte_amd64.s

// Copyright 2018 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"

TEXT	·IndexByte(SB), NOSPLIT, $0-40
	MOVQ b_base+0(FP), SI
	MOVQ b_len+8(FP), BX
	MOVB c+24(FP), AL
	LEAQ ret+32(FP), R8
	JMP  indexbytebody<>(SB)

TEXT	·IndexByteString(SB), NOSPLIT, $0-32
	MOVQ s_base+0(FP), SI
	MOVQ s_len+8(FP), BX
	MOVB c+16(FP), AL
	LEAQ ret+24(FP), R8
	JMP  indexbytebody<>(SB)

// input:
//   SI: data
//   BX: data len
//   AL: byte sought
//   R8: address to put result
TEXT	indexbytebody<>(SB), NOSPLIT, $0
	// Shuffle X0 around so that each byte contains
	// the character we're looking for.
	MOVD AX, X0
	PUNPCKLBW X0, X0
	PUNPCKLBW X0, X0
	PSHUFL $0, X0, X0

CMPQ BX, $16
	JLT small

MOVQ SI, DI

CMPQ BX, $32
	JA avx2
sse:
	LEAQ	-16(SI)(BX*1), AX	// AX = address of last 16 bytes
	JMP	sseloopentry

sseloop:
	// Move the next 16-byte chunk of the data into X1.
	MOVOU	(DI), X1
	// Compare bytes in X0 to X1.
	PCMPEQB	X0, X1
	// Take the top bit of each byte in X1 and put the result in DX.
	PMOVMSKB X1, DX
	// Find first set bit, if any.
	BSFL	DX, DX
	JNZ	ssesuccess
	// Advance to next block.
	ADDQ	$16, DI
sseloopentry:
	CMPQ	DI, AX
	JB	sseloop

// Search the last 16-byte chunk. This chunk may overlap with the
	// chunks we've already searched, but that's ok.
	MOVQ	AX, DI
	MOVOU	(AX), X1
	PCMPEQB	X0, X1
	PMOVMSKB X1, DX
	BSFL	DX, DX
	JNZ	ssesuccess

failure:
	MOVQ $-1, (R8)
	RET

// We've found a chunk containing the byte.
// The chunk was loaded from DI.
// The index of the matching byte in the chunk is DX.
// The start of the data is SI.
ssesuccess:
	SUBQ SI, DI	// Compute offset of chunk within data.
	ADDQ DX, DI	// Add offset of byte within chunk.
	MOVQ DI, (R8)
	RET

// handle for lengths < 16
small:
	TESTQ	BX, BX
	JEQ	failure

// Check if we'll load across a page boundary.
	LEAQ	16(SI), AX
	TESTW	$0xff0, AX
	JEQ	endofpage

MOVOU	(SI), X1 // Load data
	PCMPEQB	X0, X1	// Compare target byte with each byte in data.
	PMOVMSKB X1, DX	// Move result bits to integer register.
	BSFL	DX, DX	// Find first set bit.
	JZ	failure	// No set bit, failure.
	CMPL	DX, BX
	JAE	failure	// Match is past end of data.
	MOVQ	DX, (R8)
	RET

endofpage:
	MOVOU	-16(SI)(BX*1), X1	// Load data into the high end of X1.
	PCMPEQB	X0, X1	// Compare target byte with each byte in data.
	PMOVMSKB X1, DX	// Move result bits to integer register.
	MOVL	BX, CX
	SHLL	CX, DX
	SHRL	$16, DX	// Shift desired bits down to bottom of register.
	BSFL	DX, DX	// Find first set bit.
	JZ	failure	// No set bit, failure.
	MOVQ	DX, (R8)
	RET

avx2:
	CMPB   internal∕cpu·X86+const_offsetX86HasAVX2(SB), $1
	JNE sse
	MOVD AX, X0
	LEAQ -32(SI)(BX*1), R11
	VPBROADCASTB  X0, Y1
avx2_loop:
	VMOVDQU (DI), Y2
	VPCMPEQB Y1, Y2, Y3
	VPTEST Y3, Y3
	JNZ avx2success
	ADDQ $32, DI
	CMPQ DI, R11
	JLT avx2_loop
	MOVQ R11, DI
	VMOVDQU (DI), Y2
	VPCMPEQB Y1, Y2, Y3
	VPTEST Y3, Y3
	JNZ avx2success
	VZEROUPPER
	MOVQ $-1, (R8)
	RET

avx2success:
	VPMOVMSKB Y3, DX
	BSFL DX, DX
	SUBQ SI, DI
	ADDQ DI, DX
	MOVQ DX, (R8)
	VZEROUPPER
	RET

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Code Editor : indexbyte_amd64.s