go loong64 源码
golang loong64 代码
文件路径：/src/cmd/asm/internal/arch/loong64.go
// Copyright 2022 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.
// This file encapsulates some of the odd characteristics of the
// Loong64 (LoongArch64) instruction set, to minimize its interaction
// with the core of the assembler.
package arch
import (
"cmd/internal/obj"
"cmd/internal/obj/loong64"
)
func jumpLoong64(word string) bool {
switch word {
case "BEQ", "BFPF", "BFPT", "BLTZ", "BGEZ", "BLEZ", "BGTZ", "BLT", "BLTU", "JIRL", "BNE", "BGE", "BGEU", "JMP", "JAL", "CALL":
return true
}
return false
}
// IsLoong64CMP reports whether the op (as defined by an loong64.A* constant) is
// one of the CMP instructions that require special handling.
func IsLoong64CMP(op obj.As) bool {
switch op {
case loong64.ACMPEQF, loong64.ACMPEQD, loong64.ACMPGEF, loong64.ACMPGED,
loong64.ACMPGTF, loong64.ACMPGTD:
return true
}
return false
}
// IsLoong64MUL reports whether the op (as defined by an loong64.A* constant) is
// one of the MUL/DIV/REM instructions that require special handling.
func IsLoong64MUL(op obj.As) bool {
switch op {
case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,
loong64.ADIV, loong64.ADIVU, loong64.ADIVV, loong64.ADIVVU,
loong64.AREM, loong64.AREMU, loong64.AREMV, loong64.AREMVU:
return true
}
return false
}
func loong64RegisterNumber(name string, n int16) (int16, bool) {
switch name {
case "F":
if 0 <= n && n <= 31 {
return loong64.REG_F0 + n, true
}
case "FCSR":
if 0 <= n && n <= 31 {
return loong64.REG_FCSR0 + n, true
}
case "FCC":
if 0 <= n && n <= 31 {
return loong64.REG_FCC0 + n, true
}
case "R":
if 0 <= n && n <= 31 {
return loong64.REG_R0 + n, true
}
}
return 0, false
}
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