diff options
| author | Cherry Zhang <cherryyz@google.com> | 2020-10-28 09:12:20 -0400 |
|---|---|---|
| committer | Cherry Zhang <cherryyz@google.com> | 2020-10-28 09:12:20 -0400 |
| commit | a16e30d162c1c7408db7821e7b9513cefa09c6ca (patch) | |
| tree | af752ba9ba44c547df39bb0af9bff79f610ba9d5 /src/internal/bytealg/count_riscv64.s | |
| parent | 91e4d2d57bc341dd82c98247117114c851380aef (diff) | |
| parent | cf6cfba4d5358404dd890f6025e573a4b2156543 (diff) | |
| download | go-a16e30d162c1c7408db7821e7b9513cefa09c6ca.tar.gz go-a16e30d162c1c7408db7821e7b9513cefa09c6ca.zip | |
[dev.link] all: merge branch 'master' into dev.linkdev.link
Clean merge.
Change-Id: Ia7b2808bc649790198d34c226a61d9e569084dc5
Diffstat (limited to 'src/internal/bytealg/count_riscv64.s')
| -rw-r--r-- | src/internal/bytealg/count_riscv64.s | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/internal/bytealg/count_riscv64.s b/src/internal/bytealg/count_riscv64.s new file mode 100644 index 0000000000..3f4eb23286 --- /dev/null +++ b/src/internal/bytealg/count_riscv64.s @@ -0,0 +1,44 @@ +// Copyright 2020 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 + MOV b_base+0(FP), A1 + MOV b_len+8(FP), A2 + MOVBU c+24(FP), A3 // byte to count + MOV ZERO, A4 // count + ADD A1, A2 // end + +loop: + BEQ A1, A2, done + MOVBU (A1), A5 + ADD $1, A1 + BNE A3, A5, loop + ADD $1, A4 + JMP loop + +done: + MOV A4, ret+32(FP) + RET + +TEXT ·CountString(SB),NOSPLIT,$0-32 + MOV s_base+0(FP), A1 + MOV s_len+8(FP), A2 + MOVBU c+16(FP), A3 // byte to count + MOV ZERO, A4 // count + ADD A1, A2 // end + +loop: + BEQ A1, A2, done + MOVBU (A1), A5 + ADD $1, A1 + BNE A3, A5, loop + ADD $1, A4 + JMP loop + +done: + MOV A4, ret+24(FP) + RET |