ARM: Implement all integer multiply instructions.

3 files changed, 370 insertions, 0 deletions

diff --git a/src/arch/arm/isa/insts/insts.isa b/src/arch/arm/isa/insts/insts.isa
index a7a96a51c..2e94a43c9 100644
--- a/src/arch/arm/isa/insts/insts.isa
+++ b/src/arch/arm/isa/insts/insts.isa
@@ -57,3 +57,6 @@
 
 //Branches
 ##include "branch.isa"
+
+//Multiply
+##include "mult.isa"
diff --git a/src/arch/arm/isa/insts/mult.isa b/src/arch/arm/isa/insts/mult.isa
new file mode 100644
index 000000000..f1a5096fd
--- /dev/null
+++ b/src/arch/arm/isa/insts/mult.isa
@@ -0,0 +1,359 @@
+// -*- mode:c++ -*-
+
+// Copyright (c) 2010 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 = ""
+
+    calcQCode = '''
+        cprintf("canOverflow: %%d\\n", Reg0 < resTemp);
+        replaceBits(CondCodes, 27, Reg0 < resTemp);
+    '''
+
+    calcCcCode = '''
+        uint16_t _iz, _in;
+        _in = (resTemp >> %(negBit)d) & 1;
+        _iz = ((%(zType)s)resTemp == 0);
+
+        CondCodes =  _in << 31 | _iz << 30 | (CondCodes & 0x3FFFFFFF);
+
+        DPRINTF(Arm, "(in, iz) = (%%d, %%d)\\n", _in, _iz);
+       '''
+
+    def buildMultInst(mnem, doCc, unCc, regs, code, flagType):
+        global header_output, decoder_output, exec_output
+        cCode = carryCode[flagType]
+        vCode = overflowCode[flagType]
+        zType = "uint32_t"
+        negBit = 31
+        if flagType == "llbit":
+            zType = "uint64_t"
+            negBit = 63
+        if flagType == "overflow":
+            ccCode = calcQCode
+        else:
+            ccCode = calcCcCode % {
+                "negBit": negBit,
+                "zType": zType
+            }
+
+        if not regs in (3, 4):
+            raise Exception, "Multiplication instructions with %d " + \
+                             "registers are not implemented"
+
+        if regs == 3:
+            base = 'Mult3'
+        else:
+            base = 'Mult4'
+
+        Name = "New" + mnem.capitalize()
+
+        if unCc:
+            iop = InstObjParams(mnem, Name, base,
+                                {"code" : code,
+                                 "predicate_test": predicateTest})
+        if doCc:
+            iopCc = InstObjParams(mnem + "s", Name + "Cc", base,
+                                  {"code" : code + ccCode,
+                                   "predicate_test": predicateTest})
+
+        if regs == 3:
+            declare = Mult3Declare
+            constructor = Mult3Constructor
+        else:
+            declare = Mult4Declare
+            constructor = Mult4Constructor
+
+        if unCc:
+            header_output += declare.subst(iop)
+            decoder_output += constructor.subst(iop)
+            exec_output += PredOpExecute.subst(iop)
+        if doCc:
+            header_output += declare.subst(iopCc)
+            decoder_output += constructor.subst(iopCc)
+            exec_output += PredOpExecute.subst(iopCc)
+
+    def buildMult3Inst(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, True, True, 3, code, flagType)
+
+    def buildMult3InstCc(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, True, False, 3, code, flagType)
+
+    def buildMult3InstUnCc(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, False, True, 3, code, flagType)
+
+    def buildMult4Inst(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, True, True, 4, code, flagType)
+
+    def buildMult4InstCc(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, True, False, 4, code, flagType)
+
+    def buildMult4InstUnCc(mnem, code, flagType = "logic"):
+        buildMultInst(mnem, False, True, 4, code, flagType)
+
+    buildMult4Inst    ("mla", "Reg0 = resTemp = Reg1 * Reg2 + Reg3;")
+    buildMult4InstUnCc("mls", "Reg0 = resTemp = Reg3 - Reg1 * Reg2;")
+    buildMult3Inst    ("mul", "Reg0 = resTemp = Reg1 * Reg2;")
+    buildMult4InstCc  ("smlabb", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 15, 0)) +
+                                        Reg3.sw;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlabt", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 31, 16)) +
+                                        Reg3.sw;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlatb", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 15, 0)) +
+                                        Reg3.sw;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlatt", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 31, 16)) +
+                                        Reg3.sw;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlad", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 31, 16)) +
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 15, 0)) +
+                                        Reg3.sw;
+                                ''', "overflow")
+    buildMult4InstCc  ("smladx", '''Reg0 = resTemp =
+                                         sext<16>(bits(Reg1, 31, 16)) *
+                                         sext<16>(bits(Reg2, 15, 0)) +
+                                         sext<16>(bits(Reg1, 15, 0)) *
+                                         sext<16>(bits(Reg2, 31, 16)) +
+                                         Reg3.sw;
+                                 ''', "overflow")
+    buildMult4Inst    ("smlal", '''resTemp = sext<32>(Reg2) * sext<32>(Reg3) +
+                                       (int64_t)((Reg1.ud << 32) | Reg0.ud);
+                                   Reg0.ud = (uint32_t)resTemp;
+                                   Reg1.ud = (uint32_t)(resTemp >> 32);
+                                ''', "llbit")
+    buildMult4InstUnCc("smlalbb", '''resTemp = sext<16>(bits(Reg2, 15, 0)) *
+                                               sext<16>(bits(Reg3, 15, 0)) +
+                                               (int64_t)((Reg1.ud << 32) |
+                                                         Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstUnCc("smlalbt", '''resTemp = sext<16>(bits(Reg2, 15, 0)) *
+                                               sext<16>(bits(Reg3, 31, 16)) +
+                                               (int64_t)((Reg1.ud << 32) |
+                                                         Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstUnCc("smlaltb", '''resTemp = sext<16>(bits(Reg2, 31, 16)) *
+                                               sext<16>(bits(Reg3, 15, 0)) +
+                                               (int64_t)((Reg1.ud << 32) |
+                                                         Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstUnCc("smlaltt", '''resTemp = sext<16>(bits(Reg2, 31, 16)) *
+                                               sext<16>(bits(Reg3, 31, 16)) +
+                                               (int64_t)((Reg1.ud << 32) |
+                                                         Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstUnCc("smlald", '''resTemp =
+                                        sext<16>(bits(Reg2, 31, 16)) *
+                                        sext<16>(bits(Reg3, 31, 16)) +
+                                        sext<16>(bits(Reg2, 15, 0)) *
+                                        sext<16>(bits(Reg3, 15, 0)) +
+                                        (int64_t)((Reg1.ud << 32) |
+                                                  Reg0.ud);
+                                    Reg0.ud = (uint32_t)resTemp;
+                                    Reg1.ud = (uint32_t)(resTemp >> 32);
+                                 ''')
+    buildMult4InstUnCc("smlaldx", '''resTemp =
+                                         sext<16>(bits(Reg2, 31, 16)) *
+                                         sext<16>(bits(Reg3, 15, 0)) +
+                                         sext<16>(bits(Reg2, 15, 0)) *
+                                         sext<16>(bits(Reg3, 31, 16)) +
+                                         (int64_t)((Reg1.ud << 32) |
+                                                   Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstCc  ("smlawb", '''Reg0 = resTemp =
+                                        (Reg1.sw *
+                                         sext<16>(bits(Reg2, 15, 0)) +
+                                         (Reg3.sw << 16)) >> 16;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlawt", '''Reg0 = resTemp =
+                                        (Reg1.sw *
+                                         sext<16>(bits(Reg2, 31, 16)) +
+                                         (Reg3.sw << 16)) >> 16;
+                                 ''', "overflow")
+    buildMult4InstCc  ("smlsd", '''Reg0 = resTemp =
+                                       sext<16>(bits(Reg1, 15, 0)) *
+                                       sext<16>(bits(Reg2, 15, 0)) -
+                                       sext<16>(bits(Reg1, 31, 16)) *
+                                       sext<16>(bits(Reg2, 31, 16)) +
+                                       Reg3.sw;
+                                ''', "overflow")
+    buildMult4InstCc  ("smlsdx", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 31, 16)) -
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 15, 0)) +
+                                        Reg3.sw;
+                                 ''', "overflow")
+    buildMult4InstUnCc("smlsld", '''resTemp =
+                                        sext<16>(bits(Reg2, 15, 0)) *
+                                        sext<16>(bits(Reg3, 15, 0)) -
+                                        sext<16>(bits(Reg2, 31, 16)) *
+                                        sext<16>(bits(Reg3, 31, 16)) +
+                                        (int64_t)((Reg1.ud << 32) |
+                                                  Reg0.ud);
+                                    Reg0.ud = (uint32_t)resTemp;
+                                    Reg1.ud = (uint32_t)(resTemp >> 32);
+                                 ''')
+    buildMult4InstUnCc("smlsldx", '''resTemp =
+                                         sext<16>(bits(Reg2, 15, 0)) *
+                                         sext<16>(bits(Reg3, 31, 16)) -
+                                         sext<16>(bits(Reg2, 31, 16)) *
+                                         sext<16>(bits(Reg3, 15, 0)) +
+                                         (int64_t)((Reg1.ud << 32) |
+                                                   Reg0.ud);
+                                     Reg0.ud = (uint32_t)resTemp;
+                                     Reg1.ud = (uint32_t)(resTemp >> 32);
+                                  ''')
+    buildMult4InstUnCc("smmla", '''Reg0 = resTemp =
+                                       ((int64_t)(Reg3.ud << 32) +
+                                        Reg1.sw * Reg2.sw) >> 32;
+                                ''')
+    buildMult4InstUnCc("smmlar", '''Reg0 = resTemp =
+                                        ((int64_t)(Reg3.ud << 32) +
+                                         Reg1.sw * Reg2.sw +
+                                         ULL(0x80000000)) >> 32;
+                                 ''')
+    buildMult4InstUnCc("smmls", '''Reg0 = resTemp =
+                                       ((int64_t)(Reg3.ud << 32) -
+                                        Reg1.sw * Reg2.sw) >> 32;
+                                ''')
+    buildMult4InstUnCc("smmlsr", '''Reg0 = resTemp =
+                                        ((int64_t)(Reg3.ud << 32) -
+                                         Reg1.sw * Reg2.sw +
+                                         ULL(0x80000000)) >> 32;
+                                 ''')
+    buildMult3InstUnCc("smmul", '''Reg0 = resTemp =
+                                       ((int64_t)Reg1 *
+                                        (int64_t)Reg2) >> 32;
+                                ''')
+    buildMult3InstUnCc("smmulr", '''Reg0 = resTemp =
+                                        ((int64_t)Reg1 *
+                                         (int64_t)Reg2 +
+                                         ULL(0x80000000)) >> 32;
+                                 ''')
+    buildMult3InstCc  ("smuad", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 15, 0)) +
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 31, 16));
+                                ''', "overflow")
+    buildMult3InstCc  ("smuadx", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 31, 16)) +
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 15, 0));
+                                 ''', "overflow")
+    buildMult3InstUnCc("smulbb", '''Reg0 = resTemp =
+                                         sext<16>(bits(Reg1, 15, 0)) *
+                                         sext<16>(bits(Reg2, 15, 0));
+                                 ''')
+    buildMult3InstUnCc("smulbt", '''Reg0 = resTemp =
+                                         sext<16>(bits(Reg1, 31, 16)) *
+                                         sext<16>(bits(Reg2, 15, 0));
+                                 ''')
+    buildMult3InstUnCc("smultb", '''Reg0 = resTemp =
+                                         sext<16>(bits(Reg1, 15, 0)) *
+                                         sext<16>(bits(Reg2, 31, 16));
+                                 ''')
+    buildMult3InstUnCc("smultt", '''Reg0 = resTemp =
+                                         sext<16>(bits(Reg1, 31, 16)) *
+                                         sext<16>(bits(Reg2, 31, 16));
+                                 ''')
+    buildMult4Inst    ("smull", '''resTemp = Reg2.sw * Reg3.sw;
+                                   Reg0 = (int32_t)resTemp;
+                                   Reg1 = (int32_t)(resTemp >> 32);
+                                ''', "llbit")
+    buildMult3InstUnCc("smulwb", '''Reg0 = resTemp =
+                                        (Reg1.sw *
+                                         sext<16>(bits(Reg2, 15, 0))) >> 16;
+                                 ''')
+    buildMult3InstUnCc("smulwt", '''Reg0 = resTemp =
+                                        (Reg1.sw *
+                                         sext<16>(bits(Reg2, 31, 16))) >> 16;
+                                 ''')
+    buildMult3InstUnCc("smusd", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 15, 0)) -
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 31, 16));
+                                ''')
+    buildMult3InstUnCc("smusdx", '''Reg0 = resTemp =
+                                        sext<16>(bits(Reg1, 15, 0)) *
+                                        sext<16>(bits(Reg2, 31, 16)) -
+                                        sext<16>(bits(Reg1, 31, 16)) *
+                                        sext<16>(bits(Reg2, 15, 0));
+                                 ''')
+    buildMult4InstUnCc("umaal", '''resTemp = Reg2.ud * Reg3.ud +
+                                             Reg0.ud + Reg1.ud;
+                                   Reg0.ud = (uint32_t)resTemp;
+                                   Reg1.ud = (uint32_t)(resTemp >> 32);
+                                ''')
+    buildMult4Inst    ("umlal", '''resTemp = Reg2.ud * Reg3.ud + Reg0.ud +
+                                             (Reg1.ud << 32);
+                                   Reg0.ud = (uint32_t)resTemp;
+                                   Reg1.ud = (uint32_t)(resTemp >> 32);
+                                ''', "llbit")
+    buildMult4Inst    ("umull", '''resTemp = Reg2.ud * Reg3.ud;
+                                   Reg0 = (uint32_t)resTemp;
+                                   Reg1 = (uint32_t)(resTemp >> 32);
+                                ''', "llbit")
+}};
diff --git a/src/arch/arm/isa/operands.isa b/src/arch/arm/isa/operands.isa
index ab4d95d47..2621106ac 100644
--- a/src/arch/arm/isa/operands.isa
+++ b/src/arch/arm/isa/operands.isa
@@ -89,6 +89,14 @@ def operands {{
               maybePCRead, maybePCWrite),
     'Shift': ('IntReg', 'uw', 'shift', 'IsInteger', 5,
               maybePCRead, maybePCWrite),
+    'Reg0': ('IntReg', 'uw', 'reg0', 'IsInteger', 6,
+              maybePCRead, maybePCWrite),
+    'Reg1': ('IntReg', 'uw', 'reg1', 'IsInteger', 7,
+              maybePCRead, maybePCWrite),
+    'Reg2': ('IntReg', 'uw', 'reg2', 'IsInteger', 8,
+              maybePCRead, maybePCWrite),
+    'Reg3': ('IntReg', 'uw', 'reg3', 'IsInteger', 9,
+              maybePCRead, maybePCWrite),
     #General Purpose Integer Reg Operands
     'Rd': ('IntReg', 'uw', 'RD', 'IsInteger', 1, maybePCRead, maybePCWrite),
     'Rm': ('IntReg', 'uw', 'RM', 'IsInteger', 2, maybePCRead, maybePCWrite),