xref: /gem5/src/arch/arm/isa/insts/str64.isa

// -*- mode:c++ -*-

// Copyright (c) 2011-2013 ARM Limited
// All rights reserved
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black

let {{

    header_output = ""
    decoder_output = ""
    exec_output = ""

    class StoreInst64(LoadStoreInst):
        execBase = 'Store64'
        micro = False

        def __init__(self, mnem, Name, size=4, user=False, flavor="normal",
                     top = False):
            super(StoreInst64, self).__init__()

            self.name = mnem
            self.Name = Name
            self.size = size
            self.user = user
            self.flavor = flavor
            self.top = top

            self.memFlags = ["ArmISA::TLB::MustBeOne"]
            self.instFlags = []
            self.codeBlobs = { "postacc_code" : "" }

            # Add memory request flags where necessary
            if self.user:
                self.memFlags.append("ArmISA::TLB::UserMode")

            if self.flavor in ("relexp", "exp"):
                # For exclusive pair ops alignment check is based on total size
                self.memFlags.append("%d" % int(math.log(self.size, 2) + 1))
            elif not (self.size == 16 and self.top):
                # Only the first microop should perform alignment checking.
                self.memFlags.append("%d" % int(math.log(self.size, 2)))

            if self.flavor not in ("release", "relex", "exclusive",
                                   "relexp", "exp"):
                self.memFlags.append("ArmISA::TLB::AllowUnaligned")

            if self.micro:
                self.instFlags.append("IsMicroop")

            if self.flavor in ("release", "relex", "relexp"):
                self.instFlags.extend(["IsMemBarrier",
                                       "IsWriteBarrier",
                                       "IsReadBarrier"])
            if self.flavor in ("relex", "exclusive", "exp", "relexp"):
                self.instFlags.append("IsStoreConditional")
                self.memFlags.append("Request::LLSC")

        def emitHelper(self, base = 'Memory64', wbDecl = None):
            global header_output, decoder_output, exec_output

            # If this is a microop itself, don't allow anything that would
            # require further microcoding.
            if self.micro:
                assert not wbDecl

            fa_code = None
            if not self.micro and self.flavor in ("normal", "release"):
                fa_code = '''
                    fault->annotate(ArmFault::SAS, %s);
                    fault->annotate(ArmFault::SSE, false);
                    fault->annotate(ArmFault::SRT, dest);
                    fault->annotate(ArmFault::SF, %s);
                    fault->annotate(ArmFault::AR, %s);
                ''' % ("0" if self.size == 1 else
                       "1" if self.size == 2 else
                       "2" if self.size == 4 else "3",
                       "true" if self.size == 8 else "false",
                       "true" if self.flavor == "release" else "false")

            (newHeader, newDecoder, newExec) = \
                self.fillTemplates(self.name, self.Name, self.codeBlobs,
                                   self.memFlags, self.instFlags,
                                   base, wbDecl, faCode=fa_code)

            header_output += newHeader
            decoder_output += newDecoder
            exec_output += newExec

        def buildEACode(self):
            # Address computation
            eaCode = ""
            if self.flavor == "fp":
                eaCode += vfp64EnabledCheckCode

            eaCode += SPAlignmentCheckCode + "EA = XBase"
            if self.size == 16:
                if self.top:
                    eaCode += " + (isBigEndian64(xc->tcBase()) ? 0 : 8)"
                else:
                    eaCode += " + (isBigEndian64(xc->tcBase()) ? 8 : 0)"
            if not self.post:
                eaCode += self.offset
            eaCode += ";"

            self.codeBlobs["ea_code"] = eaCode


    class StoreImmInst64(StoreInst64):
        def __init__(self, *args, **kargs):
            super(StoreImmInst64, self).__init__(*args, **kargs)
            self.offset = "+ imm"

            self.wbDecl = "MicroAddXiUop(machInst, base, base, imm);"

    class StoreRegInst64(StoreInst64):
        def __init__(self, *args, **kargs):
            super(StoreRegInst64, self).__init__(*args, **kargs)
            self.offset = "+ extendReg64(XOffset, type, shiftAmt, 64)"

            self.wbDecl = \
                "MicroAddXERegUop(machInst, base, base, " + \
                "                 offset, type, shiftAmt);"

    class StoreRawRegInst64(StoreInst64):
        def __init__(self, *args, **kargs):
            super(StoreRawRegInst64, self).__init__(*args, **kargs)
            self.offset = ""

    class StoreSingle64(StoreInst64):
        def emit(self):
            self.buildEACode()

            # Code that actually handles the access
            if self.flavor == "fp":
                if self.size in (1, 2, 4):
                    accCode = '''
                        Mem%(suffix)s =
                            cSwap(AA64FpDestP0%(suffix)s, isBigEndian64(xc->tcBase()));
                    '''
                elif self.size == 8 or (self.size == 16 and not self.top):
                    accCode = '''
                        uint64_t data = AA64FpDestP1_uw;
                        data = (data << 32) | AA64FpDestP0_uw;
                        Mem%(suffix)s = cSwap(data, isBigEndian64(xc->tcBase()));
                    '''
                elif self.size == 16 and self.top:
                    accCode = '''
                        uint64_t data = AA64FpDestP3_uw;
                        data = (data << 32) | AA64FpDestP2_uw;
                        Mem%(suffix)s = cSwap(data, isBigEndian64(xc->tcBase()));
                    '''
            else:
                accCode = \
                    'Mem%(suffix)s = cSwap(XDest%(suffix)s, isBigEndian64(xc->tcBase()));'
            if self.size == 16:
                accCode = accCode % \
                    { "suffix" : buildMemSuffix(False, 8) }
            else:
                accCode = accCode % \
                    { "suffix" : buildMemSuffix(False, self.size) }

            self.codeBlobs["memacc_code"] = accCode

            if self.flavor in ("relex", "exclusive"):
                self.instFlags.append("IsStoreConditional")
                self.memFlags.append("Request::LLSC")

            # Push it out to the output files
            wbDecl = None
            if self.writeback and not self.micro:
                wbDecl = self.wbDecl
            self.emitHelper(self.base, wbDecl)

    class StoreDouble64(StoreInst64):
        def emit(self):
            self.buildEACode()

            # Code that actually handles the access
            if self.flavor == "fp":
                accCode = '''
                    uint64_t data = AA64FpDest2P0_uw;
                    data = (data << 32) | AA64FpDestP0_uw;
                    Mem_ud = cSwap(data, isBigEndian64(xc->tcBase()));
                '''
            else:
                if self.size == 4:
                    accCode = '''
                        uint64_t data = XDest2_uw;
                        data = (data << 32) | XDest_uw;
                        Mem_ud = cSwap(data, isBigEndian64(xc->tcBase()));
                    '''
                elif self.size == 8:
                    accCode = '''
                        // This temporary needs to be here so that the parser
                        // will correctly identify this instruction as a store.
                        Twin64_t temp;
                        temp.a = XDest_ud;
                        temp.b = XDest2_ud;
                        Mem_tud = temp;
                    '''
            self.codeBlobs["memacc_code"] = accCode

            # Push it out to the output files
            wbDecl = None
            if self.writeback and not self.micro:
                wbDecl = self.wbDecl
            self.emitHelper(self.base, wbDecl)

    class StoreImm64(StoreImmInst64, StoreSingle64):
        decConstBase = 'LoadStoreImm64'
        base = 'ArmISA::MemoryImm64'
        writeback = False
        post = False

    class StorePre64(StoreImmInst64, StoreSingle64):
        decConstBase = 'LoadStoreImm64'
        base = 'ArmISA::MemoryPreIndex64'
        writeback = True
        post = False

    class StorePost64(StoreImmInst64, StoreSingle64):
        decConstBase = 'LoadStoreImm64'
        base = 'ArmISA::MemoryPostIndex64'
        writeback = True
        post = True

    class StoreReg64(StoreRegInst64, StoreSingle64):
        decConstBase = 'LoadStoreReg64'
        base = 'ArmISA::MemoryReg64'
        writeback = False
        post = False

    class StoreRaw64(StoreRawRegInst64, StoreSingle64):
        decConstBase = 'LoadStoreRaw64'
        base = 'ArmISA::MemoryRaw64'
        writeback = False
        post = False

    class StoreEx64(StoreRawRegInst64, StoreSingle64):
        decConstBase = 'LoadStoreEx64'
        base = 'ArmISA::MemoryEx64'
        writeback = False
        post = False
        execBase = 'StoreEx64'
        def __init__(self, *args, **kargs):
            super(StoreEx64, self).__init__(*args, **kargs)
            self.codeBlobs["postacc_code"] = "XResult = !writeResult;"

    def buildStores64(mnem, NameBase, size, flavor="normal"):
        StoreImm64(mnem, NameBase + "_IMM", size, flavor=flavor).emit()
        StorePre64(mnem, NameBase + "_PRE", size, flavor=flavor).emit()
        StorePost64(mnem, NameBase + "_POST", size, flavor=flavor).emit()
        StoreReg64(mnem, NameBase + "_REG", size, flavor=flavor).emit()

    buildStores64("strb", "STRB64", 1)
    buildStores64("strh", "STRH64", 2)
    buildStores64("str", "STRW64", 4)
    buildStores64("str", "STRX64", 8)
    buildStores64("str", "STRBFP64", 1, flavor="fp")
    buildStores64("str", "STRHFP64", 2, flavor="fp")
    buildStores64("str", "STRSFP64", 4, flavor="fp")
    buildStores64("str", "STRDFP64", 8, flavor="fp")

    StoreImm64("sturb", "STURB64_IMM", 1).emit()
    StoreImm64("sturh", "STURH64_IMM", 2).emit()
    StoreImm64("stur", "STURW64_IMM", 4).emit()
    StoreImm64("stur", "STURX64_IMM", 8).emit()
    StoreImm64("stur", "STURBFP64_IMM", 1, flavor="fp").emit()
    StoreImm64("stur", "STURHFP64_IMM", 2, flavor="fp").emit()
    StoreImm64("stur", "STURSFP64_IMM", 4, flavor="fp").emit()
    StoreImm64("stur", "STURDFP64_IMM", 8, flavor="fp").emit()

    StoreImm64("sttrb", "STTRB64_IMM", 1, user=True).emit()
    StoreImm64("sttrh", "STTRH64_IMM", 2, user=True).emit()
    StoreImm64("sttr", "STTRW64_IMM", 4, user=True).emit()
    StoreImm64("sttr", "STTRX64_IMM", 8, user=True).emit()

    StoreRaw64("stlr", "STLRX64", 8, flavor="release").emit()
    StoreRaw64("stlr", "STLRW64", 4, flavor="release").emit()
    StoreRaw64("stlrh", "STLRH64", 2, flavor="release").emit()
    StoreRaw64("stlrb", "STLRB64", 1, flavor="release").emit()

    StoreEx64("stlxr", "STLXRX64", 8, flavor="relex").emit()
    StoreEx64("stlxr", "STLXRW64", 4, flavor="relex").emit()
    StoreEx64("stlxrh", "STLXRH64", 2, flavor="relex").emit()
    StoreEx64("stlxrb", "STLXRB64", 1, flavor="relex").emit()

    StoreEx64("stxr", "STXRX64", 8, flavor="exclusive").emit()
    StoreEx64("stxr", "STXRW64", 4, flavor="exclusive").emit()
    StoreEx64("stxrh", "STXRH64", 2, flavor="exclusive").emit()
    StoreEx64("stxrb", "STXRB64", 1, flavor="exclusive").emit()

    class StoreImmU64(StoreImm64):
        decConstBase = 'LoadStoreImmU64'
        micro = True

    class StoreImmDU64(StoreImmInst64, StoreDouble64):
        decConstBase = 'LoadStoreImmDU64'
        base = 'ArmISA::MemoryDImm64'
        micro = True
        post = False
        writeback = False

    class StoreImmDEx64(StoreImmInst64, StoreDouble64):
        execBase = 'StoreEx64'
        decConstBase = 'StoreImmDEx64'
        base = 'ArmISA::MemoryDImmEx64'
        micro = False
        post = False
        writeback = False
        def __init__(self, *args, **kargs):
            super(StoreImmDEx64, self).__init__(*args, **kargs)
            self.codeBlobs["postacc_code"] = "XResult = !writeResult;"

    class StoreRegU64(StoreReg64):
        decConstBase = 'LoadStoreRegU64'
        micro = True

    StoreImmDEx64("stlxp", "STLXPW64", 4, flavor="relexp").emit()
    StoreImmDEx64("stlxp", "STLXPX64", 8, flavor="relexp").emit()
    StoreImmDEx64("stxp", "STXPW64", 4, flavor="exp").emit()
    StoreImmDEx64("stxp", "STXPX64", 8, flavor="exp").emit()

    StoreImmU64("strxi_uop", "MicroStrXImmUop", 8).emit()
    StoreRegU64("strxr_uop", "MicroStrXRegUop", 8).emit()
    StoreImmU64("strfpxi_uop", "MicroStrFpXImmUop", 8, flavor="fp").emit()
    StoreRegU64("strfpxr_uop", "MicroStrFpXRegUop", 8, flavor="fp").emit()
    StoreImmU64("strqbfpxi_uop", "MicroStrQBFpXImmUop",
                16, flavor="fp", top=False).emit()
    StoreRegU64("strqbfpxr_uop", "MicroStrQBFpXRegUop",
                16, flavor="fp", top=False).emit()
    StoreImmU64("strqtfpxi_uop", "MicroStrQTFpXImmUop",
                16, flavor="fp", top=True).emit()
    StoreRegU64("strqtfpxr_uop", "MicroStrQTFpXRegUop",
                16, flavor="fp", top=True).emit()
    StoreImmDU64("strdxi_uop", "MicroStrDXImmUop", 4).emit()
    StoreImmDU64("strdfpxi_uop", "MicroStrDFpXImmUop", 4, flavor="fp").emit()

}};