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// 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" TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT,$0-40 #ifndef GOEXPERIMENT_regabiargs MOVV b_base+0(FP), R4 MOVV b_len+8(FP), R5 MOVBU c+24(FP), R7 // byte to find #endif // R4 = b_base // R5 = b_len // R6 = b_cap (unused) // R7 = byte to find AND $0xff, R7 MOVV R4, R6 // store base for later ADDV R4, R5 // end ADDV $-1, R4 PCALIGN $16 loop: ADDV $1, R4 BEQ R4, R5, notfound MOVBU (R4), R8 BNE R7, R8, loop SUBV R6, R4 // remove base #ifndef GOEXPERIMENT_regabiargs MOVV R4, ret+32(FP) #endif RET notfound: MOVV $-1, R4 #ifndef GOEXPERIMENT_regabiargs MOVV R4, ret+32(FP) #endif RET TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32 #ifndef GOEXPERIMENT_regabiargs MOVV s_base+0(FP), R4 MOVV s_len+8(FP), R5 MOVBU c+16(FP), R6 // byte to find #endif // R4 = s_base // R5 = s_len // R6 = byte to find MOVV R4, R7 // store base for later ADDV R4, R5 // end ADDV $-1, R4 PCALIGN $16 loop: ADDV $1, R4 BEQ R4, R5, notfound MOVBU (R4), R8 BNE R6, R8, loop SUBV R7, R4 // remove base #ifndef GOEXPERIMENT_regabiargs MOVV R4, ret+24(FP) #endif RET notfound: MOVV $-1, R4 #ifndef GOEXPERIMENT_regabiargs MOVV R4, ret+24(FP) #endif RET