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Diffstat (limited to 'src/internal/bytealg/equal_mips64x.s')
| -rw-r--r-- | src/internal/bytealg/equal_mips64x.s | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/internal/bytealg/equal_mips64x.s b/src/internal/bytealg/equal_mips64x.s new file mode 100644 index 0000000..d92f225 --- /dev/null +++ b/src/internal/bytealg/equal_mips64x.s @@ -0,0 +1,118 @@ +// Copyright 2018 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. + +//go:build mips64 || mips64le + +#include "go_asm.h" +#include "textflag.h" + +#define REGCTXT R22 + +// memequal(a, b unsafe.Pointer, size uintptr) bool +TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25 + MOVV a+0(FP), R1 + MOVV b+8(FP), R2 + BEQ R1, R2, eq + MOVV size+16(FP), R3 + ADDV R1, R3, R4 + + // chunk size is 16 + SGTU $16, R3, R8 + BEQ R0, R8, chunk_entry + +byte_loop: + BNE R1, R4, byte_test + MOVV $1, R1 + MOVB R1, ret+24(FP) + RET +byte_test: + MOVBU (R1), R6 + ADDV $1, R1 + MOVBU (R2), R7 + ADDV $1, R2 + BEQ R6, R7, byte_loop + JMP not_eq + +chunk_entry: + // make sure both a and b are aligned + OR R1, R2, R9 + AND $0x7, R9 + BNE R0, R9, byte_loop + JMP chunk_loop_1 + +chunk_loop: + // chunk size is 16 + SGTU $16, R3, R8 + BNE R0, R8, chunk_tail_8 +chunk_loop_1: + MOVV (R1), R6 + MOVV (R2), R7 + BNE R6, R7, not_eq + MOVV 8(R1), R12 + MOVV 8(R2), R13 + ADDV $16, R1 + ADDV $16, R2 + SUBV $16, R3 + BEQ R12, R13, chunk_loop + JMP not_eq + +chunk_tail_8: + AND $8, R3, R14 + BEQ R0, R14, chunk_tail_4 + MOVV (R1), R6 + MOVV (R2), R7 + BNE R6, R7, not_eq + ADDV $8, R1 + ADDV $8, R2 + +chunk_tail_4: + AND $4, R3, R14 + BEQ R0, R14, chunk_tail_2 + MOVWU (R1), R6 + MOVWU (R2), R7 + BNE R6, R7, not_eq + ADDV $4, R1 + ADDV $4, R2 + +chunk_tail_2: + AND $2, R3, R14 + BEQ R0, R14, chunk_tail_1 + MOVHU (R1), R6 + MOVHU (R2), R7 + BNE R6, R7, not_eq + ADDV $2, R1 + ADDV $2, R2 + +chunk_tail_1: + AND $1, R3, R14 + BEQ R0, R14, eq + MOVBU (R1), R6 + MOVBU (R2), R7 + BEQ R6, R7, eq + +not_eq: + MOVB R0, ret+24(FP) + RET +eq: + MOVV $1, R1 + MOVB R1, ret+24(FP) + RET + +// memequal_varlen(a, b unsafe.Pointer) bool +TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17 + MOVV a+0(FP), R1 + MOVV b+8(FP), R2 + BEQ R1, R2, eq + MOVV 8(REGCTXT), R3 // compiler stores size at offset 8 in the closure + MOVV R1, 8(R29) + MOVV R2, 16(R29) + MOVV R3, 24(R29) + JAL runtime·memequal(SB) + MOVBU 32(R29), R1 + MOVB R1, ret+16(FP) + RET +eq: + MOVV $1, R1 + MOVB R1, ret+16(FP) + RET |