diff options
Diffstat (limited to 'src/internal/bytealg/indexbyte_riscv64.s')
| -rw-r--r-- | src/internal/bytealg/indexbyte_riscv64.s | 51 |
1 files changed, 51 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..de00983 --- /dev/null +++ b/src/internal/bytealg/indexbyte_riscv64.s @@ -0,0 +1,51 @@ +// 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 + // 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 + SUB $1, X10 + +loop: + ADD $1, X10 + BEQ X10, X11, notfound + MOVBU (X10), X14 + BNE X13, X14, loop + + SUB X12, X10 // remove base + RET + +notfound: + MOV $-1, X10 + RET + +TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32 + // X10 = b_base + // X11 = b_len + // X12 = byte to find + AND $0xff, X12 + MOV X10, X13 // store base for later + ADD X10, X11 // end + SUB $1, X10 + +loop: + ADD $1, X10 + BEQ X10, X11, notfound + MOVBU (X10), X14 + BNE X12, X14, loop + + SUB X13, X10 // remove base + RET + +notfound: + MOV $-1, X10 + RET |