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-rw-r--r--src/arch/arm/isa/decoder/arm.isa8
-rw-r--r--src/arch/arm/isa/decoder/thumb.isa3
-rw-r--r--src/arch/arm/isa/formats/formats.isa3
-rw-r--r--src/arch/arm/isa/formats/m5ops.isa78
-rw-r--r--src/arch/arm/isa/includes.isa1
-rw-r--r--src/arch/arm/isa/insts/insts.isa3
-rw-r--r--src/arch/arm/isa/insts/m5ops.isa275
-rw-r--r--src/arch/arm/isa/operands.isa3
-rw-r--r--src/arch/arm/types.hh2
9 files changed, 373 insertions, 3 deletions
diff --git a/src/arch/arm/isa/decoder/arm.isa b/src/arch/arm/isa/decoder/arm.isa
index 3f43b23e1..9ab95b82f 100644
--- a/src/arch/arm/isa/decoder/arm.isa
+++ b/src/arch/arm/isa/decoder/arm.isa
@@ -90,7 +90,12 @@ format DataOp {
0x0: ArmParallelAddSubtract::armParallelAddSubtract();
0x1: ArmPackUnpackSatReverse::armPackUnpackSatReverse();
0x2: ArmSignedMultiplies::armSignedMultiplies();
- 0x3: ArmMiscMedia::armMiscMedia();
+ 0x3: decode MEDIA_OPCODE {
+ 0x1F: decode OPC2 {
+ default: ArmMiscMedia::armMiscMedia();
+ }
+ default: ArmMiscMedia::armMiscMedia();
+ }
}
}
0x4: ArmMacroMem::armMacroMem();
@@ -107,6 +112,7 @@ format DataOp {
0xa, 0xb: VfpData::vfpData();
} // CPNUM
1: decode CPNUM { // 27-24=1110,4 ==1
+ 0x1: M5ops::m5ops();
0xa, 0xb: ShortFpTransfer::shortFpTransfer();
0xf: McrMrc15::mcrMrc15();
} // CPNUM (OP4 == 1)
diff --git a/src/arch/arm/isa/decoder/thumb.isa b/src/arch/arm/isa/decoder/thumb.isa
index d0f5b8646..f144e3003 100644
--- a/src/arch/arm/isa/decoder/thumb.isa
+++ b/src/arch/arm/isa/decoder/thumb.isa
@@ -84,6 +84,7 @@ decode BIGTHUMB {
default: WarnUnimpl::cdp(); // cdp2
}
0x1: decode LTCOPROC {
+ 0x1: M5ops::m5ops();
0xa, 0xb: ShortFpTransfer::shortFpTransfer();
0xf: McrMrc15::mcrMrc15();
}
@@ -125,7 +126,6 @@ decode BIGTHUMB {
0x0: LoadByteMemoryHints::loadByteMemoryHints();
0x1: LoadHalfwordMemoryHints::loadHalfwordMemoryHints();
0x2: Thumb32LoadWord::thumb32LoadWord();
- 0x3: Unknown::undefined();
}
}
0x1: decode HTOPCODE_8_7 {
@@ -140,6 +140,7 @@ decode BIGTHUMB {
default: WarnUnimpl::cdp(); // cdp2
}
0x1: decode LTCOPROC {
+ 0x1: M5ops::m5ops();
0xa, 0xb: ShortFpTransfer::shortFpTransfer();
0xf: McrMrc15::mcrMrc15();
}
diff --git a/src/arch/arm/isa/formats/formats.isa b/src/arch/arm/isa/formats/formats.isa
index a42a33365..90144c101 100644
--- a/src/arch/arm/isa/formats/formats.isa
+++ b/src/arch/arm/isa/formats/formats.isa
@@ -79,3 +79,6 @@
//Unconditional instructions
##include "uncond.isa"
+
+//M5 Psuedo-ops
+##include "m5ops.isa"
diff --git a/src/arch/arm/isa/formats/m5ops.isa b/src/arch/arm/isa/formats/m5ops.isa
new file mode 100644
index 000000000..2f5fe2c3a
--- /dev/null
+++ b/src/arch/arm/isa/formats/m5ops.isa
@@ -0,0 +1,78 @@
+//
+// 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: Gene Wu
+///
+
+def format M5ops() {{
+ decode_block = '''
+ {
+ const uint32_t m5func = bits(machInst, 23, 16);
+ switch(m5func) {
+#if FULL_SYSTEM
+ case 0x00: return new Arm(machInst);
+ case 0x01: return new Quiesce(machInst);
+ case 0x02: return new QuiesceNs(machInst);
+ case 0x03: return new QuiesceCycles(machInst);
+ case 0x04: return new QuiesceTime(machInst);
+#endif
+ case 0x07: return new Rpns(machInst);
+ case 0x09: return new WakeCPU(machInst);
+ case 0x10: return new Deprecated_ivlb(machInst);
+ case 0x11: return new Deprecated_ivle(machInst);
+ case 0x20: return new Deprecated_exit (machInst);
+ case 0x21: return new M5exit(machInst);
+#if FULL_SYSTEM
+ case 0x31: return new Loadsymbol(machInst);
+ case 0x30: return new Initparam(machInst);
+#endif
+ case 0x40: return new Resetstats(machInst);
+ case 0x41: return new Dumpstats(machInst);
+ case 0x42: return new Dumpresetstats(machInst);
+ case 0x43: return new M5checkpoint(machInst);
+#if FULL_SYSTEM
+ case 0x50: return new M5readfile(machInst);
+#endif
+ case 0x51: return new M5break(machInst);
+ case 0x52: return new M5switchcpu(machInst);
+#if FULL_SYSTEM
+ case 0x53: return new M5addsymbol(machInst);
+#endif
+ case 0x54: return new M5panic(machInst);
+ }
+ }
+ '''
+}};
diff --git a/src/arch/arm/isa/includes.isa b/src/arch/arm/isa/includes.isa
index 111552c78..5840cc9b2 100644
--- a/src/arch/arm/isa/includes.isa
+++ b/src/arch/arm/isa/includes.isa
@@ -86,6 +86,7 @@ output exec {{
#include <fenv.h>
#endif
+#include "base/cp_annotate.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "sim/sim_exit.hh"
diff --git a/src/arch/arm/isa/insts/insts.isa b/src/arch/arm/isa/insts/insts.isa
index 9c51f3cf0..c01e87df8 100644
--- a/src/arch/arm/isa/insts/insts.isa
+++ b/src/arch/arm/isa/insts/insts.isa
@@ -75,3 +75,6 @@
//Neon
##include "neon.isa"
+
+//m5 Psuedo-ops
+##include "m5ops.isa"
diff --git a/src/arch/arm/isa/insts/m5ops.isa b/src/arch/arm/isa/insts/m5ops.isa
new file mode 100644
index 000000000..da3609bbc
--- /dev/null
+++ b/src/arch/arm/isa/insts/m5ops.isa
@@ -0,0 +1,275 @@
+//
+// 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: Gene Wu
+
+
+let {{
+ header_output = ""
+ decoder_output = ""
+ exec_output = ""
+
+ armCode = '''
+#if FULL_SYSTEM
+ PseudoInst::arm(xc->tcBase());
+#endif
+ '''
+ armIop = InstObjParams("arm", "Arm", "PredOp",
+ { "code": armCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(armIop)
+ decoder_output += BasicConstructor.subst(armIop)
+ exec_output += PredOpExecute.subst(armIop)
+
+ quiesceCode = '''
+#if FULL_SYSTEM
+ PseudoInst::quiesceNs(xc->tcBase(), R0);
+#endif
+ '''
+ quiesceIop = InstObjParams("quiesce", "Quiesce", "PredOp",
+ { "code": quiesceCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsQuiesce"])
+ header_output += BasicDeclare.subst(quiesceIop)
+ decoder_output += BasicConstructor.subst(quiesceIop)
+ exec_output += PredOpExecute.subst(quiesceIop)
+
+ quiesceNsCode = '''
+#if FULL_SYSTEM
+ PseudoInst::quiesceNs(xc->tcBase(), R0);
+#endif
+ '''
+
+ quiesceNsIop = InstObjParams("quiesceNs", "QuiesceNs", "PredOp",
+ { "code": quiesceNsCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsQuiesce"])
+ header_output += BasicDeclare.subst(quiesceNsIop)
+ decoder_output += BasicConstructor.subst(quiesceNsIop)
+ exec_output += PredOpExecute.subst(quiesceNsIop)
+
+ quiesceCyclesCode = '''
+#if FULL_SYSTEM
+ PseudoInst::quiesceCycles(xc->tcBase(), R0);
+#endif
+ '''
+
+ quiesceCyclesIop = InstObjParams("quiesceCycles", "QuiesceCycles", "PredOp",
+ { "code": quiesceCyclesCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsQuiesce", "IsUnverifiable"])
+ header_output += BasicDeclare.subst(quiesceCyclesIop)
+ decoder_output += BasicConstructor.subst(quiesceCyclesIop)
+ exec_output += PredOpExecute.subst(quiesceCyclesIop)
+
+ quiesceTimeCode = '''
+#if FULL_SYSTEM
+ R0 = PseudoInst::quiesceTime(xc->tcBase());
+#endif
+ '''
+
+ quiesceTimeIop = InstObjParams("quiesceTime", "QuiesceTime", "PredOp",
+ { "code": quiesceTimeCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsUnverifiable"])
+ header_output += BasicDeclare.subst(quiesceTimeIop)
+ decoder_output += BasicConstructor.subst(quiesceTimeIop)
+ exec_output += PredOpExecute.subst(quiesceTimeIop)
+
+ rpnsIop = InstObjParams("rpns", "Rpns", "PredOp",
+ { "code": "R0 = PseudoInst::rpns(xc->tcBase());",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsUnverifiable"])
+ header_output += BasicDeclare.subst(rpnsIop)
+ decoder_output += BasicConstructor.subst(rpnsIop)
+ exec_output += PredOpExecute.subst(rpnsIop)
+
+ wakeCPUIop = InstObjParams("wakeCPU", "WakeCPU", "PredOp",
+ { "code": "PseudoInst::wakeCPU(xc->tcBase(), R0);",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative", "IsUnverifiable"])
+ header_output += BasicDeclare.subst(wakeCPUIop)
+ decoder_output += BasicConstructor.subst(wakeCPUIop)
+ exec_output += PredOpExecute.subst(wakeCPUIop)
+
+ deprecated_ivlbIop = InstObjParams("deprecated_ivlb", "Deprecated_ivlb", "PredOp",
+ { "code": '''warn_once("Obsolete M5 ivlb instruction encountered.\\n");''',
+ "predicate_test": predicateTest })
+ header_output += BasicDeclare.subst(deprecated_ivlbIop)
+ decoder_output += BasicConstructor.subst(deprecated_ivlbIop)
+ exec_output += PredOpExecute.subst(deprecated_ivlbIop)
+
+ deprecated_ivleIop = InstObjParams("deprecated_ivle", "Deprecated_ivle", "PredOp",
+ { "code": '''warn_once("Obsolete M5 ivle instruction encountered.\\n");''',
+ "predicate_test": predicateTest })
+ header_output += BasicDeclare.subst(deprecated_ivleIop)
+ decoder_output += BasicConstructor.subst(deprecated_ivleIop)
+ exec_output += PredOpExecute.subst(deprecated_ivleIop)
+
+ deprecated_exit_code = '''
+ warn_once("Obsolete M5 exit instruction encountered.\\n");
+ PseudoInst::m5exit(xc->tcBase(), 0);
+ '''
+
+ deprecated_exitIop = InstObjParams("deprecated_exit", "Deprecated_exit", "PredOp",
+ { "code": deprecated_exit_code,
+ "predicate_test": predicateTest },
+ ["No_OpClass", "IsNonSpeculative"])
+ header_output += BasicDeclare.subst(deprecated_exitIop)
+ decoder_output += BasicConstructor.subst(deprecated_exitIop)
+ exec_output += PredOpExecute.subst(deprecated_exitIop)
+
+ m5exitIop = InstObjParams("m5exit", "M5exit", "PredOp",
+ { "code": "PseudoInst::m5exit(xc->tcBase(), R0)",
+ "predicate_test": predicateTest },
+ ["No_OpClass", "IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5exitIop)
+ decoder_output += BasicConstructor.subst(m5exitIop)
+ exec_output += PredOpExecute.subst(m5exitIop)
+
+ loadsymbolCode = '''
+#if FULL_SYSTEM
+ PseudoInst::loadsymbol(xc->tcBase());
+#endif
+ '''
+
+ loadsymbolIop = InstObjParams("loadsymbol", "Loadsymbol", "PredOp",
+ { "code": loadsymbolCode,
+ "predicate_test": predicateTest },
+ ["No_OpClass", "IsNonSpeculative"])
+ header_output += BasicDeclare.subst(loadsymbolIop)
+ decoder_output += BasicConstructor.subst(loadsymbolIop)
+ exec_output += PredOpExecute.subst(loadsymbolIop)
+
+ initparamCode = '''
+#if FULL_SYSTEM
+ Rt = xc->tcBase()->getCpuPtr()->system->init_param;
+#endif
+ '''
+
+ initparamIop = InstObjParams("initparam", "Initparam", "PredOp",
+ { "code": initparamCode,
+ "predicate_test": predicateTest })
+ header_output += BasicDeclare.subst(initparamIop)
+ decoder_output += BasicConstructor.subst(initparamIop)
+ exec_output += PredOpExecute.subst(initparamIop)
+
+ resetstatsIop = InstObjParams("resetstats", "Resetstats", "PredOp",
+ { "code": "PseudoInst::resetstats(xc->tcBase(), R0, R1);",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(resetstatsIop)
+ decoder_output += BasicConstructor.subst(resetstatsIop)
+ exec_output += PredOpExecute.subst(resetstatsIop)
+
+ dumpstatsIop = InstObjParams("dumpstats", "Dumpstats", "PredOp",
+ { "code": "PseudoInst::dumpstats(xc->tcBase(), R0, R1);",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(dumpstatsIop)
+ decoder_output += BasicConstructor.subst(dumpstatsIop)
+ exec_output += PredOpExecute.subst(dumpstatsIop)
+
+ dumpresetstatsIop = InstObjParams("dumpresetstats", "Dumpresetstats", "PredOp",
+ { "code": "PseudoInst::dumpresetstats(xc->tcBase(), R0, R1);",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(dumpresetstatsIop)
+ decoder_output += BasicConstructor.subst(dumpresetstatsIop)
+ exec_output += PredOpExecute.subst(dumpresetstatsIop)
+
+ m5checkpointIop = InstObjParams("m5checkpoint", "M5checkpoint", "PredOp",
+ { "code": "PseudoInst::m5checkpoint(xc->tcBase(), R0, R1);",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5checkpointIop)
+ decoder_output += BasicConstructor.subst(m5checkpointIop)
+ exec_output += PredOpExecute.subst(m5checkpointIop)
+
+ m5readfileCode = '''
+#if FULL_SYSTEM
+ R0 = PseudoInst::readfile(xc->tcBase(), R0, R1, R2);
+#endif
+ '''
+ m5readfileIop = InstObjParams("m5readfile", "M5readfile", "PredOp",
+ { "code": m5readfileCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5readfileIop)
+ decoder_output += BasicConstructor.subst(m5readfileIop)
+ exec_output += PredOpExecute.subst(m5readfileIop)
+
+ m5breakIop = InstObjParams("m5break", "M5break", "PredOp",
+ { "code": "PseudoInst::debugbreak(xc->tcBase());",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5breakIop)
+ decoder_output += BasicConstructor.subst(m5breakIop)
+ exec_output += PredOpExecute.subst(m5breakIop)
+
+ m5switchcpuIop = InstObjParams("m5switchcpu", "M5switchcpu", "PredOp",
+ { "code": "PseudoInst::switchcpu(xc->tcBase());",
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5switchcpuIop)
+ decoder_output += BasicConstructor.subst(m5switchcpuIop)
+ exec_output += PredOpExecute.subst(m5switchcpuIop)
+
+ m5addsymbolCode = '''
+#if FULL_SYSTEM
+ PseudoInst::addsymbol(xc->tcBase(), R0, R1);
+#endif
+ '''
+ m5addsymbolIop = InstObjParams("m5addsymbol", "M5addsymbol", "PredOp",
+ { "code": m5addsymbolCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5addsymbolIop)
+ decoder_output += BasicConstructor.subst(m5addsymbolIop)
+ exec_output += PredOpExecute.subst(m5addsymbolIop)
+
+ m5panicCode = '''panic("M5 panic instruction called at pc=%#x.",
+ xc->pcState().pc());'''
+ m5panicIop = InstObjParams("m5panic", "M5panic", "PredOp",
+ { "code": m5panicCode,
+ "predicate_test": predicateTest },
+ ["IsNonSpeculative"])
+ header_output += BasicDeclare.subst(m5panicIop)
+ decoder_output += BasicConstructor.subst(m5panicIop)
+ exec_output += PredOpExecute.subst(m5panicIop)
+
+}};
diff --git a/src/arch/arm/isa/operands.isa b/src/arch/arm/isa/operands.isa
index 8e856e74d..3c32d98d1 100644
--- a/src/arch/arm/isa/operands.isa
+++ b/src/arch/arm/isa/operands.isa
@@ -170,6 +170,9 @@ def operands {{
'Rn': ('IntReg', 'uw', 'RN', 'IsInteger', 3, maybePCRead, maybePCWrite),
'R7': ('IntReg', 'uw', '7', 'IsInteger', 3),
'R0': ('IntReg', 'uw', '0', 'IsInteger', 3),
+ 'R1': ('IntReg', 'uw', '0', 'IsInteger', 3),
+ 'R2': ('IntReg', 'uw', '1', 'IsInteger', 3),
+ 'Rt' : ('IntReg', 'uw', 'RT', 'IsInteger', 3, maybePCRead, maybePCWrite),
'LR': ('IntReg', 'uw', 'INTREG_LR', 'IsInteger', 3),
'CondCodes': ('IntReg', 'uw', 'INTREG_CONDCODES', None, 3),
diff --git a/src/arch/arm/types.hh b/src/arch/arm/types.hh
index 57f34e3c2..a679686c7 100644
--- a/src/arch/arm/types.hh
+++ b/src/arch/arm/types.hh
@@ -141,7 +141,7 @@ namespace ArmISA
Bitfield<2, 0> fpImm;
Bitfield<24, 20> punwl;
- Bitfield<7, 0> m5Func;
+ Bitfield<15, 8> m5Func;
// 16 bit thumb bitfields
Bitfield<15, 13> topcode15_13;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 14:31:55 +0000