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Name
Size
Permission
Action
bytealg.go
664
B
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compare_386.s
2.65
KB
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compare_amd64.s
4.13
KB
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compare_arm.s
1.75
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compare_arm64.s
2.15
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compare_generic.go
994
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compare_mips64x.s
1.66
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compare_mipsx.s
1.39
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compare_native.go
590
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compare_ppc64x.s
6.56
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compare_s390x.s
1.19
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compare_wasm.s
1.44
KB
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count_amd64.s
3.96
KB
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count_arm.s
917
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count_arm64.s
2.02
KB
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count_generic.go
460
B
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count_native.go
616
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count_ppc64x.s
2.71
KB
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count_s390x.s
5.38
KB
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equal_386.s
2.16
KB
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equal_amd64.s
2.52
KB
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equal_arm.s
1.81
KB
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equal_arm64.s
2.64
KB
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equal_generic.go
628
B
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equal_mips64x.s
1.02
KB
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equal_mipsx.s
1.07
KB
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equal_native.go
789
B
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equal_ppc64x.s
2.33
KB
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equal_riscv64.s
963
B
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equal_s390x.s
1.77
KB
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equal_wasm.s
1.1
KB
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index_amd64.go
617
B
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index_amd64.s
5
KB
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index_arm64.go
706
B
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index_arm64.s
3.91
KB
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index_generic.go
872
B
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index_native.go
559
B
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index_s390x.go
1011
B
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index_s390x.s
5.5
KB
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indexbyte_386.s
647
B
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indexbyte_amd64.s
3.07
KB
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indexbyte_arm.s
951
B
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indexbyte_arm64.s
3.33
KB
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indexbyte_generic.go
516
B
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indexbyte_mips64x.s
981
B
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indexbyte_mipsx.s
1008
B
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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--
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Code Editor : count_arm64.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 ·Count(SB),NOSPLIT,$0-40 MOVD b_base+0(FP), R0 MOVD b_len+8(FP), R2 MOVBU c+24(FP), R1 MOVD $ret+32(FP), R8 B countbytebody<>(SB) TEXT ·CountString(SB),NOSPLIT,$0-32 MOVD s_base+0(FP), R0 MOVD s_len+8(FP), R2 MOVBU c+16(FP), R1 MOVD $ret+24(FP), R8 B countbytebody<>(SB) // input: // R0: data // R2: data len // R1: byte to find // R8: address to put result TEXT countbytebody<>(SB),NOSPLIT,$0 // R11 = count of byte to search MOVD $0, R11 // short path to handle 0-byte case CBZ R2, done CMP $0x20, R2 // jump directly to tail if length < 32 BLO tail ANDS $0x1f, R0, R9 BEQ chunk // Work with not 32-byte aligned head BIC $0x1f, R0, R3 ADD $0x20, R3 head_loop: MOVBU.P 1(R0), R5 CMP R5, R1 CINC EQ, R11, R11 SUB $1, R2, R2 CMP R0, R3 BNE head_loop // Work with 32-byte aligned chunks chunk: BIC $0x1f, R2, R9 // The first chunk can also be the last CBZ R9, tail // R3 = end of 32-byte chunks ADD R0, R9, R3 MOVD $1, R5 VMOV R5, V5.B16 // R2 = length of tail SUB R9, R2, R2 // Duplicate R1 (byte to search) to 16 1-byte elements of V0 VMOV R1, V0.B16 // Clear the low 64-bit element of V7 and V8 VEOR V7.B8, V7.B8, V7.B8 VEOR V8.B8, V8.B8, V8.B8 // Count the target byte in 32-byte chunk chunk_loop: VLD1.P (R0), [V1.B16, V2.B16] CMP R0, R3 VCMEQ V0.B16, V1.B16, V3.B16 VCMEQ V0.B16, V2.B16, V4.B16 // Clear the higher 7 bits VAND V5.B16, V3.B16, V3.B16 VAND V5.B16, V4.B16, V4.B16 // Count lanes match the requested byte VADDP V4.B16, V3.B16, V6.B16 // 32B->16B VUADDLV V6.B16, V7 // Accumulate the count in low 64-bit element of V8 when inside the loop VADD V7, V8 BNE chunk_loop VMOV V8.D[0], R6 ADD R6, R11, R11 CBZ R2, done tail: // Work with tail shorter than 32 bytes MOVBU.P 1(R0), R5 SUB $1, R2, R2 CMP R5, R1 CINC EQ, R11, R11 CBNZ R2, tail done: MOVD R11, (R8) RET
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