mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-02 15:30:01 +00:00
103 lines
3 KiB
Go
103 lines
3 KiB
Go
|
// 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.
|
||
|
|
|
||
|
|
// This file encapsulates some of the odd characteristics of the
|
||
|
|
// 64-bit PowerPC (PPC64) instruction set, to minimize its interaction
|
||
|
|
// with the core of the assembler.
|
||
|
|
|
||
|
|
package arch
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/twitchyliquid64/golang-asm/obj"
|
||
|
|
"github.com/twitchyliquid64/golang-asm/obj/ppc64"
|
||
|
|
)
|
||
|
|
|
||
|
|
func jumpPPC64(word string) bool {
|
||
|
|
switch word {
|
||
|
|
case "BC", "BCL", "BEQ", "BGE", "BGT", "BL", "BLE", "BLT", "BNE", "BR", "BVC", "BVS", "CALL", "JMP":
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsPPC64RLD reports whether the op (as defined by an ppc64.A* constant) is
|
||
|
|
// one of the RLD-like instructions that require special handling.
|
||
|
|
// The FMADD-like instructions behave similarly.
|
||
|
|
func IsPPC64RLD(op obj.As) bool {
|
||
|
|
switch op {
|
||
|
|
case ppc64.ARLDC, ppc64.ARLDCCC, ppc64.ARLDCL, ppc64.ARLDCLCC,
|
||
|
|
ppc64.ARLDCR, ppc64.ARLDCRCC, ppc64.ARLDMI, ppc64.ARLDMICC,
|
||
|
|
ppc64.ARLWMI, ppc64.ARLWMICC, ppc64.ARLWNM, ppc64.ARLWNMCC:
|
||
|
|
return true
|
||
|
|
case ppc64.AFMADD, ppc64.AFMADDCC, ppc64.AFMADDS, ppc64.AFMADDSCC,
|
||
|
|
ppc64.AFMSUB, ppc64.AFMSUBCC, ppc64.AFMSUBS, ppc64.AFMSUBSCC,
|
||
|
|
ppc64.AFNMADD, ppc64.AFNMADDCC, ppc64.AFNMADDS, ppc64.AFNMADDSCC,
|
||
|
|
ppc64.AFNMSUB, ppc64.AFNMSUBCC, ppc64.AFNMSUBS, ppc64.AFNMSUBSCC:
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func IsPPC64ISEL(op obj.As) bool {
|
||
|
|
return op == ppc64.AISEL
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsPPC64CMP reports whether the op (as defined by an ppc64.A* constant) is
|
||
|
|
// one of the CMP instructions that require special handling.
|
||
|
|
func IsPPC64CMP(op obj.As) bool {
|
||
|
|
switch op {
|
||
|
|
case ppc64.ACMP, ppc64.ACMPU, ppc64.ACMPW, ppc64.ACMPWU, ppc64.AFCMPU:
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsPPC64NEG reports whether the op (as defined by an ppc64.A* constant) is
|
||
|
|
// one of the NEG-like instructions that require special handling.
|
||
|
|
func IsPPC64NEG(op obj.As) bool {
|
||
|
|
switch op {
|
||
|
|
case ppc64.AADDMECC, ppc64.AADDMEVCC, ppc64.AADDMEV, ppc64.AADDME,
|
||
|
|
ppc64.AADDZECC, ppc64.AADDZEVCC, ppc64.AADDZEV, ppc64.AADDZE,
|
||
|
|
ppc64.ACNTLZDCC, ppc64.ACNTLZD, ppc64.ACNTLZWCC, ppc64.ACNTLZW,
|
||
|
|
ppc64.AEXTSBCC, ppc64.AEXTSB, ppc64.AEXTSHCC, ppc64.AEXTSH,
|
||
|
|
ppc64.AEXTSWCC, ppc64.AEXTSW, ppc64.ANEGCC, ppc64.ANEGVCC,
|
||
|
|
ppc64.ANEGV, ppc64.ANEG, ppc64.ASLBMFEE, ppc64.ASLBMFEV,
|
||
|
|
ppc64.ASLBMTE, ppc64.ASUBMECC, ppc64.ASUBMEVCC, ppc64.ASUBMEV,
|
||
|
|
ppc64.ASUBME, ppc64.ASUBZECC, ppc64.ASUBZEVCC, ppc64.ASUBZEV,
|
||
|
|
ppc64.ASUBZE:
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func ppc64RegisterNumber(name string, n int16) (int16, bool) {
|
||
|
|
switch name {
|
||
|
|
case "CR":
|
||
|
|
if 0 <= n && n <= 7 {
|
||
|
|
return ppc64.REG_CR0 + n, true
|
||
|
|
}
|
||
|
|
case "VS":
|
||
|
|
if 0 <= n && n <= 63 {
|
||
|
|
return ppc64.REG_VS0 + n, true
|
||
|
|
}
|
||
|
|
case "V":
|
||
|
|
if 0 <= n && n <= 31 {
|
||
|
|
return ppc64.REG_V0 + n, true
|
||
|
|
}
|
||
|
|
case "F":
|
||
|
|
if 0 <= n && n <= 31 {
|
||
|
|
return ppc64.REG_F0 + n, true
|
||
|
|
}
|
||
|
|
case "R":
|
||
|
|
if 0 <= n && n <= 31 {
|
||
|
|
return ppc64.REG_R0 + n, true
|
||
|
|
}
|
||
|
|
case "SPR":
|
||
|
|
if 0 <= n && n <= 1024 {
|
||
|
|
return ppc64.REG_SPR0 + n, true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0, false
|
||
|
|
}
|