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// 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