diff options
Diffstat (limited to 'src/internal/bytealg/equal_riscv64.s')
| -rw-r--r-- | src/internal/bytealg/equal_riscv64.s | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/internal/bytealg/equal_riscv64.s b/src/internal/bytealg/equal_riscv64.s index 87b2d79302..58e033f847 100644 --- a/src/internal/bytealg/equal_riscv64.s +++ b/src/internal/bytealg/equal_riscv64.s @@ -2,6 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +#include "asm_riscv64.h" #include "go_asm.h" #include "textflag.h" @@ -28,6 +29,35 @@ length_check: MOV $32, X23 BLT X12, X23, loop4_check +#ifndef hasV + MOVB internal∕cpu·RISCV64+const_offsetRISCV64HasV(SB), X5 + BEQZ X5, equal_scalar +#endif + + // Use vector if not 8 byte aligned. + OR X10, X11, X5 + AND $7, X5 + BNEZ X5, vector_loop + + // Use scalar if 8 byte aligned and <= 64 bytes. + SUB $64, X12, X6 + BLEZ X6, loop32_check + + PCALIGN $16 +vector_loop: + VSETVLI X12, E8, M8, TA, MA, X5 + VLE8V (X10), V8 + VLE8V (X11), V16 + VMSNEVV V8, V16, V0 + VFIRSTM V0, X6 + BGEZ X6, done + ADD X5, X10 + ADD X5, X11 + SUB X5, X12 + BNEZ X12, vector_loop + JMP done + +equal_scalar: // Check alignment - if alignment differs we have to do one byte at a time. AND $7, X10, X9 AND $7, X11, X19 |