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https://codeberg.org/superseriousbusiness/gotosocial.git
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103 lines
3 KiB
Go
103 lines
3 KiB
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This file encapsulates some of the odd characteristics of the
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// 64-bit PowerPC (PPC64) instruction set, to minimize its interaction
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// with the core of the assembler.
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package arch
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import (
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"github.com/twitchyliquid64/golang-asm/obj"
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"github.com/twitchyliquid64/golang-asm/obj/ppc64"
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)
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func jumpPPC64(word string) bool {
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switch word {
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case "BC", "BCL", "BEQ", "BGE", "BGT", "BL", "BLE", "BLT", "BNE", "BR", "BVC", "BVS", "CALL", "JMP":
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return true
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}
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return false
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}
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// IsPPC64RLD reports whether the op (as defined by an ppc64.A* constant) is
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// one of the RLD-like instructions that require special handling.
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// The FMADD-like instructions behave similarly.
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func IsPPC64RLD(op obj.As) bool {
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switch op {
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case ppc64.ARLDC, ppc64.ARLDCCC, ppc64.ARLDCL, ppc64.ARLDCLCC,
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ppc64.ARLDCR, ppc64.ARLDCRCC, ppc64.ARLDMI, ppc64.ARLDMICC,
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ppc64.ARLWMI, ppc64.ARLWMICC, ppc64.ARLWNM, ppc64.ARLWNMCC:
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return true
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case ppc64.AFMADD, ppc64.AFMADDCC, ppc64.AFMADDS, ppc64.AFMADDSCC,
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ppc64.AFMSUB, ppc64.AFMSUBCC, ppc64.AFMSUBS, ppc64.AFMSUBSCC,
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ppc64.AFNMADD, ppc64.AFNMADDCC, ppc64.AFNMADDS, ppc64.AFNMADDSCC,
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ppc64.AFNMSUB, ppc64.AFNMSUBCC, ppc64.AFNMSUBS, ppc64.AFNMSUBSCC:
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return true
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}
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return false
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}
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func IsPPC64ISEL(op obj.As) bool {
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return op == ppc64.AISEL
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}
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// IsPPC64CMP reports whether the op (as defined by an ppc64.A* constant) is
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// one of the CMP instructions that require special handling.
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func IsPPC64CMP(op obj.As) bool {
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switch op {
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case ppc64.ACMP, ppc64.ACMPU, ppc64.ACMPW, ppc64.ACMPWU, ppc64.AFCMPU:
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return true
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}
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return false
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}
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// IsPPC64NEG reports whether the op (as defined by an ppc64.A* constant) is
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// one of the NEG-like instructions that require special handling.
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func IsPPC64NEG(op obj.As) bool {
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switch op {
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case ppc64.AADDMECC, ppc64.AADDMEVCC, ppc64.AADDMEV, ppc64.AADDME,
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ppc64.AADDZECC, ppc64.AADDZEVCC, ppc64.AADDZEV, ppc64.AADDZE,
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ppc64.ACNTLZDCC, ppc64.ACNTLZD, ppc64.ACNTLZWCC, ppc64.ACNTLZW,
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ppc64.AEXTSBCC, ppc64.AEXTSB, ppc64.AEXTSHCC, ppc64.AEXTSH,
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ppc64.AEXTSWCC, ppc64.AEXTSW, ppc64.ANEGCC, ppc64.ANEGVCC,
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ppc64.ANEGV, ppc64.ANEG, ppc64.ASLBMFEE, ppc64.ASLBMFEV,
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ppc64.ASLBMTE, ppc64.ASUBMECC, ppc64.ASUBMEVCC, ppc64.ASUBMEV,
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ppc64.ASUBME, ppc64.ASUBZECC, ppc64.ASUBZEVCC, ppc64.ASUBZEV,
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ppc64.ASUBZE:
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return true
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}
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return false
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}
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func ppc64RegisterNumber(name string, n int16) (int16, bool) {
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switch name {
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case "CR":
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if 0 <= n && n <= 7 {
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return ppc64.REG_CR0 + n, true
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}
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case "VS":
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if 0 <= n && n <= 63 {
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return ppc64.REG_VS0 + n, true
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}
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case "V":
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if 0 <= n && n <= 31 {
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return ppc64.REG_V0 + n, true
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}
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case "F":
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if 0 <= n && n <= 31 {
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return ppc64.REG_F0 + n, true
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}
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case "R":
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if 0 <= n && n <= 31 {
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return ppc64.REG_R0 + n, true
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}
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case "SPR":
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if 0 <= n && n <= 1024 {
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return ppc64.REG_SPR0 + n, true
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}
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}
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return 0, false
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}
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