// Copyright 2025 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.

package asmgen

var ArchMIPS = &Arch{

Name: "mipsx",

Build: "mips || mipsle",

WordBits: 32,

WordBytes: 4,

CarrySafeLoop: true,

regs: []string{

// R0 is 0

// R23 is the assembler/linker temporary (which we use too).

// R26 and R27 are our virtual carry flags.

// R28 is SB.

// R29 is SP.

// R30 is g.

// R31 is LR.

"R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9",

"R10", "R11", "R12", "R13", "R14", "R15", "R16", "R17", "R18", "R19",

"R20", "R21", "R22", "R24", "R25", "R26", "R27",

},

reg0: "R0",

regTmp: "R23",

regCarry: "R26",

regAltCarry: "R27",

mov: "MOVW",

add: "ADDU",

sltu: "SGTU", // SGTU args are swapped, so it's really SLTU

sub: "SUBU",

mulWideF: mipsMulWide,

lsh: "SLL",

rsh: "SRL",

and: "AND",

or: "OR",

xor: "XOR",

jmpZero: "BEQ %s, %s",

jmpNonZero: "BNE %s, %s",

}

func mipsMulWide(a *Asm, src1, src2, dstlo, dsthi Reg) {

a.Printf("\tMULU %s, %s\n\tMOVW LO, %s\n\tMOVW HI, %s\n", src1, src2, dstlo, dsthi)

}