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Diffstat (limited to '')
| -rw-r--r-- | src/internal/bytealg/indexbyte_riscv64.s | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/internal/bytealg/indexbyte_riscv64.s b/src/internal/bytealg/indexbyte_riscv64.s new file mode 100644 index 0000000..a203965 --- /dev/null +++ b/src/internal/bytealg/indexbyte_riscv64.s @@ -0,0 +1,73 @@ +// Copyright 2019 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 + MOV b_base+0(FP), X10 + MOV b_len+8(FP), X11 + MOVBU c+24(FP), X13 // byte to find +#endif + // X10 = b_base + // X11 = b_len + // X12 = b_cap (unused) + // X13 = byte to find + AND $0xff, X13 + MOV X10, X12 // store base for later + ADD X10, X11 // end + ADD $-1, X10 + +loop: + ADD $1, X10 + BEQ X10, X11, notfound + MOVBU (X10), X14 + BNE X13, X14, loop + + SUB X12, X10 // remove base +#ifndef GOEXPERIMENT_regabiargs + MOV X10, ret+32(FP) +#endif + RET + +notfound: + MOV $-1, X10 +#ifndef GOEXPERIMENT_regabiargs + MOV X10, ret+32(FP) +#endif + RET + +TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32 +#ifndef GOEXPERIMENT_regabiargs + MOV s_base+0(FP), X10 + MOV s_len+8(FP), X11 + MOVBU c+16(FP), X12 // byte to find +#endif + // X10 = b_base + // X11 = b_len + // X12 = byte to find + AND $0xff, X12 + MOV X10, X13 // store base for later + ADD X10, X11 // end + ADD $-1, X10 + +loop: + ADD $1, X10 + BEQ X10, X11, notfound + MOVBU (X10), X14 + BNE X12, X14, loop + + SUB X13, X10 // remove base +#ifndef GOEXPERIMENT_regabiargs + MOV X10, ret+24(FP) +#endif + RET + +notfound: + MOV $-1, X10 +#ifndef GOEXPERIMENT_regabiargs + MOV X10, ret+24(FP) +#endif + RET |