Editando: memclr_mips64x.s
// Copyright 2015 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" // See memclrNoHeapPointers Go doc for important implementation constraints. // func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr) TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16 MOVV ptr+0(FP), R1 MOVV n+8(FP), R2 ADDV R1, R2, R4 // if less than 16 bytes or no MSA, do words check SGTU $16, R2, R3 BNE R3, no_msa MOVBU internal∕cpu·MIPS64X+const_offsetMIPS64XHasMSA(SB), R3 BEQ R3, R0, no_msa VMOVB $0, W0 SGTU $128, R2, R3 BEQ R3, msa_large AND $15, R2, R5 XOR R2, R5, R6 ADDVU R1, R6 msa_small: VMOVB W0, (R1) ADDVU $16, R1 SGTU R6, R1, R3 BNE R3, R0, msa_small BEQ R5, R0, done VMOVB W0, -16(R4) JMP done msa_large: AND $127, R2, R5 XOR R2, R5, R6 ADDVU R1, R6 msa_large_loop: VMOVB W0, (R1) VMOVB W0, 16(R1) VMOVB W0, 32(R1) VMOVB W0, 48(R1) VMOVB W0, 64(R1) VMOVB W0, 80(R1) VMOVB W0, 96(R1) VMOVB W0, 112(R1) ADDVU $128, R1 SGTU R6, R1, R3 BNE R3, R0, msa_large_loop BEQ R5, R0, done VMOVB W0, -128(R4) VMOVB W0, -112(R4) VMOVB W0, -96(R4) VMOVB W0, -80(R4) VMOVB W0, -64(R4) VMOVB W0, -48(R4) VMOVB W0, -32(R4) VMOVB W0, -16(R4) JMP done no_msa: // if less than 8 bytes, do one byte at a time SGTU $8, R2, R3 BNE R3, out // do one byte at a time until 8-aligned AND $7, R1, R3 BEQ R3, words MOVB R0, (R1) ADDV $1, R1 JMP -4(PC) words: // do 8 bytes at a time if there is room ADDV $-7, R4, R2 SGTU R2, R1, R3 BEQ R3, out MOVV R0, (R1) ADDV $8, R1 JMP -4(PC) out: BEQ R1, R4, done MOVB R0, (R1) ADDV $1, R1 JMP -3(PC) done: RET
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