diff options
author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:01 -0500 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:01 -0500 |
commit | 8933857af75c2419bb41cbd92e7190fd91cc8837 (patch) | |
tree | fb0e0d41ea1a75008675d4ad9b4eeeabfdb2390d /src/arch/arm/isa/decoder/thumb.isa | |
parent | 4ebd44dc4f8d7b5085a8f1d1929cdd0381bc7c43 (diff) | |
download | gem5-8933857af75c2419bb41cbd92e7190fd91cc8837.tar.xz |
ARM: Create a "decoder" directory for the files implementing the decoder.
--HG--
rename : src/arch/arm/isa/armdecode.isa => src/arch/arm/isa/decoder/arm.isa
rename : src/arch/arm/isa/decoder.isa => src/arch/arm/isa/decoder/decoder.isa
rename : src/arch/arm/isa/thumbdecode.isa => src/arch/arm/isa/decoder/thumb.isa
rename : src/arch/arm/isa/vfpdecode.isa => src/arch/arm/isa/decoder/vfp.isa
Diffstat (limited to 'src/arch/arm/isa/decoder/thumb.isa')
-rw-r--r-- | src/arch/arm/isa/decoder/thumb.isa | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/src/arch/arm/isa/decoder/thumb.isa b/src/arch/arm/isa/decoder/thumb.isa new file mode 100644 index 000000000..7aba61b57 --- /dev/null +++ b/src/arch/arm/isa/decoder/thumb.isa @@ -0,0 +1,523 @@ +// -*- 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. +// +// Copyright (c) 2009 The Regents of The University of Michigan +// All rights reserved. +// +// 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 + +1: decode BIGTHUMB { + // 16 bit thumb instructions. + 0: decode TOPCODE_15_13 { + 0x0, 0x1: decode TOPCODE_13_11 { + 0x0: WarnUnimpl::lsl(); //immediate + 0x1: WarnUnimpl::lsr(); //immediate + 0x2: WarnUnimpl::asr(); //immediate + 0x3: decode TOPCODE_10_9 { + 0x0: WarnUnimpl::add(); //register + 0x1: WarnUnimpl::sub(); //register + 0x2: WarnUnimpl::add(); //3 bit immediate + 0x3: WarnUnimpl::sub(); //3 bit immediate + } + 0x4: WarnUnimpl::mov(); //immediate + 0x5: WarnUnimpl::cmp(); //immediate + 0x6: WarnUnimpl::add(); //8 bit immediate, thumb + 0x7: WarnUnimpl::sub(); //8 bit immediate, thumb + } + 0x2: decode TOPCODE_12_10 { + // Data processing + 0x0: decode TOPCODE_9_6 { + 0x0: WarnUnimpl::and(); //register + 0x1: WarnUnimpl::eor(); //register + 0x2: WarnUnimpl::lsl(); //register + 0x3: WarnUnimpl::lsr(); //register + 0x4: WarnUnimpl::asr(); //register + 0x5: WarnUnimpl::adc(); //register + 0x6: WarnUnimpl::sbc(); //register + 0x7: WarnUnimpl::ror(); //register + 0x8: WarnUnimpl::tst(); //register + 0x9: WarnUnimpl::rsb(); //immediate + 0xa: WarnUnimpl::cmp(); //register (high registers) + 0xb: WarnUnimpl::cmn(); //register + 0xc: WarnUnimpl::orr(); //register + 0xd: WarnUnimpl::mul(); + 0xe: WarnUnimpl::bic(); //register + 0xf: WarnUnimpl::mvn(); //register + } + // Special data instructions and branch and exchange + 0x1: decode TOPCODE_9_6 { + 0x0: WarnUnimpl::add(); //register (low registers) + 0x1, 0x2, 0x3: WarnUnimpl::add(); //register (high registers) + 0x4: WarnUnimpl::unpredictable(); //? + 0x5, 0x6, 0x7: WarnUnimpl::cmp(); //register + 0x8: WarnUnimpl::mov(); //register (low registers) + 0x9, 0xa, 0xb: WarnUnimpl::mov(); //register (high registers) + 0xc, 0xd: WarnUnimpl::bx(); + 0xe, 0xf: WarnUnimpl::blx(); //register + } + 0x2, 0x3: WarnUnimpl::ldr(); + default: decode TOPCODE_11_9 { + 0x0: WarnUnimpl::str(); //register + 0x1: WarnUnimpl::strh(); //register + 0x2: WarnUnimpl::strb(); //register + 0x3: WarnUnimpl::ldrsb(); //register + 0x4: WarnUnimpl::ldr(); //register + 0x5: WarnUnimpl::ldrh(); //register + 0x6: WarnUnimpl::ldrb(); //register + 0x7: WarnUnimpl::ldrsh(); //register + } + } + 0x3: decode TOPCODE_12_11 { + 0x0: WarnUnimpl::str(); //immediate, thumb + 0x1: WarnUnimpl::ldr(); //immediate, thumb + 0x2: WarnUnimpl::strb(); //immediate, thumb + 0x3: WarnUnimpl::ldrb(); //immediate, thumb + } + 0x4: decode TOPCODE_12_11 { + 0x0: WarnUnimpl::strh(); //immediate, thumb + 0x1: WarnUnimpl::ldrh(); //immediate, thumb + 0x2: WarnUnimpl::str(); //immediate, thumb + 0x3: WarnUnimpl::ldr(); //immediate, thumb + } + 0x5: decode TOPCODE_12_11 { + 0x0: WarnUnimpl::adr(); + 0x1: WarnUnimpl::add(); //sp, immediate + 0x2: decode TOPCODE_10_8 { + 0x0: decode TOPCODE_7 { + 0x0: WarnUnimpl::add(); //sp, immediate + 0x1: WarnUnimpl::sub(); //sp, immediate + } + 0x1, 0x3: WarnUnimpl::cbz(); //cbnz too... + 0x2: decode TOPCODE_7_6 { + 0x0: WarnUnimpl::sxth(); + 0x1: WarnUnimpl::sxtb(); + 0x2: WarnUnimpl::uxth(); + 0x3: WarnUnimpl::uxtb(); + } + 0x4, 0x5: WarnUnimpl::pop(); + 0x6: decode TOPCODE_7_5 { + 0x2: WarnUnimpl::setend(); + 0x3: WarnUnimpl::cps(); + } + } + 0x3: decode TOPCODE_10_8 { + 0x1, 0x3: WarnUnimpl::cbz(); //cbnz too... + 0x2: decode TOPCODE_7_6 { + 0x0: WarnUnimpl::rev(); + 0x1: WarnUnimpl::rev16(); + 0x3: WarnUnimpl::revsh(); + } + 0x4, 0x5: WarnUnimpl::pop(); + 0x6: WarnUnimpl::bkpt(); + 0x7: decode TOPCODE_3_0 { + 0x0: WarnUnimpl::it(); + default: decode TOPCODE_7_4 { + 0x0: WarnUnimpl::nop(); + 0x1: WarnUnimpl::yield(); + 0x2: WarnUnimpl::wfe(); + 0x3: WarnUnimpl::wfi(); + 0x4: WarnUnimpl::sev(); + default: WarnUnimpl::unallocated_hint(); + } + } + } + } + 0x6: decode TOPCODE_12_11 { + 0x0: WarnUnimpl::stm(); // also stmia, stmea + 0x1: WarnUnimpl::ldm(); // also ldmia, ldmea + default: decode TOPCODE_11_8 { + 0xe: WarnUnimpl::undefined(); // permanently undefined + 0xf: WarnUnimpl::svc(); // formerly swi + default: WarnUnimpl::b(); // conditional + } + } + 0x7: decode TOPCODE_12_11 { + 0x0: WarnUnimpl::b(); // unconditional + } + } + + // 32 bit thumb instructions. + 1: decode HTOPCODE_12_11 { + 0x1: decode HTOPCODE_10_9 { + 0x0: decode HTOPCODE_8_6 { + 0x0, 0x6: decode HTOPCODE_4 { + 0x0: WarnUnimpl::srs(); + 0x1: WarnUnimpl::rfe(); + } + 0x1: decode HTOPCODE_5_4 { + 0x0: WarnUnimpl::strex(); + 0x1: WarnUnimpl::ldrex(); + 0x2: WarnUnimpl::strd(); // immediate + 0x3: decode HTRN { + 0xf: WarnUnimpl::ldrd(); // literal + default: WarnUnimpl::ldrd(); // immediate + } + } + 0x2: decode HTOPCODE_4 { + 0x0: WarnUnimpl::stm(); // stmia, stmea + 0x1: decode HTRN { + 0xd: WarnUnimpl::pop(); + default: WarnUnimpl::ldm(); // ldmia, ldmfd + } + } + 0x3: decode HTOPCODE_5_4 { + 0x0: decode LTOPCODE_7_4 { + 0x4: WarnUnimpl::strexb(); + 0x5: WarnUnimpl::strexh(); + 0x7: WarnUnimpl::strexd(); + } + 0x1: decode LTOPCODE_7_4 { + 0x0: WarnUnimpl::tbb(); + 0x1: WarnUnimpl::tbh(); + 0x4: WarnUnimpl::ldrexb(); + 0x5: WarnUnimpl::ldrexh(); + 0x7: WarnUnimpl::ldrexd(); + } + 0x2: WarnUnimpl::strd(); // immediate + 0x3: decode HTRN { + 0xf: WarnUnimpl::ldrd(); // literal + default: WarnUnimpl::ldrd(); // immediate + } + } + 0x4: decode HTOPCODE_4 { + 0x0: decode HTRN { + 0xd: WarnUnimpl::push(); + default: WarnUnimpl::stmdb(); // stmfd + } + 0x1: WarnUnimpl::ldmdb(); // ldmea + } + 0x5, 0x7: decode HTOPCODE_4 { + 0x0: WarnUnimpl::strd(); // immediate + 0x1: decode HTRN { + 0xf: WarnUnimpl::ldrd(); // literal + default: WarnUnimpl::ldrd(); // immediate + } + } + } + 0x1: decode HTOPCODE_8_5 { + 0x0: decode LTRD { + 0xf: decode HTS { + 0x1: WarnUnimpl::tst(); // register + } + default: WarnUnimpl::and(); // register + } + 0x1: WarnUnimpl::bic(); // register + 0x2: decode HTRN { + 0xf: WarnUnimpl::mov(); // register + default: WarnUnimpl::orr(); // register + } + 0x3: decode HTRN { + 0xf: WarnUnimpl::mvn(); // register + default: WarnUnimpl::orn(); // register + } + 0x4: decode LTRD { + 0xf: decode HTS { + 0x1: WarnUnimpl::teq(); // register + } + default: WarnUnimpl::eor(); // register + } + 0x6: WarnUnimpl::pkh(); + 0x8: decode LTRD { + 0xf: decode HTS { + 0x1: WarnUnimpl::cmn(); // register + } + default: WarnUnimpl::add(); // register + } + 0xa: WarnUnimpl::adc(); // register + 0xb: WarnUnimpl::sbc(); // register + 0xd: decode LTRD { + 0xf: decode HTS { + 0x1: WarnUnimpl::cmp(); // register + } + default: WarnUnimpl::sub(); // register + } + 0xe: WarnUnimpl::rsb(); // register + } + default: decode HTOPCODE_9_8 { + 0x2: decode LTOPCODE_4 { + 0x0: decode LTCOPROC { + 0xa, 0xb: decode OPCODE_23_20 { +##include "vfp.isa" + } + default: WarnUnimpl::cdp(); // cdp2 + } + 0x1: decode LTCOPROC { + 0xa, 0xb: WarnUnimpl::Core_to_extension_transfer(); + default: decode HTOPCODE_4 { + 0x0: WarnUnimpl::mcr(); // mcr2 + 0x1: WarnUnimpl::mrc(); // mrc2 + } + } + } + 0x3: WarnUnimpl::Advanced_SIMD(); + default: decode LTCOPROC { + 0xa, 0xb: decode HTOPCODE_9_4 { + 0x00: WarnUnimpl::undefined(); + 0x04: WarnUnimpl::mcrr(); // mcrr2 + 0x05: WarnUnimpl::mrrc(); // mrrc2 + 0x02, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, + 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e: + WarnUnimpl::stc(); // stc2 + 0x03, 0x07, 0x09, 0x0b, 0x0d, 0x0f, 0x11, + 0x13, 0x15, 0x17, 0x19, 0x1b, 0x1d, 0x1f: + decode HTRN { + 0xf: WarnUnimpl::ldc(); // ldc2 (literal) + default: WarnUnimpl::ldc(); // ldc2 (immediate) + } + } + default: decode HTOPCODE_9_5 { + 0x00: WarnUnimpl::undefined(); + 0x02: WarnUnimpl::SIMD_VFP_64_bit_core_extension_transfer(); + 0x01, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f: + WarnUnimpl::Extension_register_load_store_instruction(); + } + } + } + } + 0x2: decode LTOPCODE_15 { + 0x0: decode HTOPCODE_9 { + 0x0: decode HTOPCODE_8_5 { + 0x0: decode LTRD { + 0xf: decode HTS { + 0x1: DataModImmOp::tst({{ + resTemp = Rn & rotated_imm; + }}); + } + default: DataModImmOp::and({{ + Rs = resTemp = Rn & rotated_imm; + }}); + } + 0x1: DataModImmOp::bic({{ + Rs = resTemp = Rn & ~rotated_imm; + }}); + 0x2: decode HTRN { + 0xf: DataModImmOp::mov({{ + Rs = resTemp = rotated_imm; + }}); + default: DataModImmOp::orr({{ + Rs = resTemp = Rn | rotated_imm; + }}); + } + 0x3: decode HTRN { + 0xf: DataModImmOp::mvn({{ + Rs = resTemp = ~rotated_imm; + }}); + default: DataModImmOp::orn({{ + Rs = resTemp = Rn | ~rotated_imm; + }}); + } + 0x4: decode LTRD { + 0xf: decode HTS { + 0x1: DataModImmOp::teq({{ + resTemp = Rn ^ rotated_imm; + }}); + } + default: DataModImmOp::eor({{ + Rs = resTemp = Rn ^ rotated_imm; + }}); + } + 0x8: decode LTRD { + 0xf: decode HTS { + 0x1: DataModImmOp::cmn({{ + resTemp = Rn + rotated_imm; + }}, add); + } + default: DataModImmOp::add({{ + Rs = resTemp = Rn + rotated_imm; + }}, add); + } + 0xa: DataModImmOp::adc({{ + Rs = resTemp = Rn + rotated_imm + CondCodes<29:>; + }}, add); + 0xb: DataModImmOp::sbc({{ + Rs = resTemp = Rn - rotated_imm - !CondCodes<29:>; + }}, sub); + 0xd: decode LTRD { + 0xf: decode HTS { + 0x1: DataModImmOp::cmp({{ + resTemp = Rn - rotated_imm; + }}, sub); + } + default: DataModImmOp::sub({{ + Rs = resTemp = Rn - rotated_imm; + }}, sub); + } + 0xe: DataModImmOp::rsb({{ + Rs = resTemp = rotated_imm - Rn; + }}, rsb); + } + 0x1: WarnUnimpl::Data_processing_plain_binary_immediate(); + } + 0x1: WarnUnimpl::Branches_and_miscellaneous_control(); + } + 0x3: decode HTOPCODE_10_9 { + 0x0: decode HTOPCODE_4 { + 0x0: decode HTOPCODE_8 { + 0x0: decode HTOPCODE_7_5 { + 0x0: decode LTOPCODE_11_8 { + 0x0: decode LTOPCODE_7_6 { + 0x0: WarnUnimpl::strb(); // register + } + 0x9, 0xb, 0xc, 0xd, 0xf: WarnUnimpl::strb(); // immediate thumb + 0xe: WarnUnimpl::strbt(); + } + 0x1: decode LTOPCODE_11_8 { + 0x0: decode LTOPCODE_7_6 { + 0x0: WarnUnimpl::strh(); // register + } + 0x9, 0xb, 0xc, 0xd, 0xf: WarnUnimpl::strh(); // immediate thumb + 0xe: WarnUnimpl::strht(); + } + 0x2: decode LTOPCODE_11_8 { + 0x0: decode LTOPCODE_7_6 { + 0x0: WarnUnimpl::str(); // register + } + 0x9, 0xb, 0xc, 0xd, 0xf: WarnUnimpl::str(); // immediate thumb + 0xe: WarnUnimpl::strt(); + } + 0x4: WarnUnimpl::strb(); // immediate, thumb + 0x5: WarnUnimpl::strh(); // immediate, thumb + 0x6: WarnUnimpl::str(); // immediate, thumb + } + 0x1: WarnUnimpl::Advanced_SIMD_or_structure_load_store(); + } + 0x1: decode HTOPCODE_6_5 { + 0x0: WarnUnimpl::Load_byte_memory_hints(); + 0x1: WarnUnimpl::Load_halfword_memory_hints(); + 0x2: decode HTOPCODE_8 { + 0x0: decode HTRN { + 0xf: ArmLoadMemory::ldr1( + {{ Rd.uw = Mem.uw }}, + {{ EA = roundUp(PC, 4) + + (UP ? IMMED_11_0 : -IMMED_11_0); }}); + default: decode HTOPCODE_7 { + 0x0: decode LTOPCODE_11_8 { + 0x0: decode LTOPCODE_7_6 { + 0x0: ArmLoadMemory::ldr2( + {{ Rd = Mem; }}, + {{ EA = Rn + + (Rm << + bits(machInst, 5, 4)); }} + ); + } + 0x9: ArmLoadMemory::ldr3( + {{ Rd = Mem; + Rn = Rn - IMMED_11_0; }}, + {{ EA = Rn; }} + ); + 0xb: ArmLoadMemory::ldr4( + {{ Rd = Mem; + Rn = Rn + IMMED_11_0; }}, + {{ EA = Rn; }} + ); + 0xc: ArmLoadMemory::ldr5( + {{ Rd = Mem; }}, + {{ EA = Rn - IMMED_11_0; }} + ); + 0xd: ArmLoadMemory::ldr6( + {{ Rd = Mem; + Rn = Rn - IMMED_11_0; }}, + {{ EA = Rn - IMMED_11_0; }} + ); + 0xf: ArmLoadMemory::ldr7( + {{ Rd = Mem; + Rn = Rn + IMMED_11_0; }}, + {{ EA = Rn + IMMED_11_0; }} + ); + 0xe: ArmLoadMemory::ldrt( + {{ Rd = Mem; }}, + {{ EA = Rn + IMMED_11_0; }} + ); // This should force user level access + } + 0x1: ArmLoadMemory::ldr8( + {{ Rd = Mem; }}, + {{ EA = Rn + IMMED_11_0; }} + ); + } + } + } + 0x3: WarnUnimpl::undefined(); + } + } + 0x1: decode HTOPCODE_8_7 { + 0x2: WarnUnimpl::Multiply_multiply_accumulate_and_absolute_difference(); + 0x3: WarnUnimpl::Long_multiply_long_multiply_accumulate_and_divide(); + default: WarnUnimpl::Data_processing_register(); + } + default: decode HTOPCODE_9_8 { + 0x2: decode LTOPCODE_4 { + 0x0: decode LTCOPROC { + 0xa, 0xb: WarnUnimpl::VFP_Inst(); + default: WarnUnimpl::cdp(); // cdp2 + } + 0x1: decode LTCOPROC { + 0xa, 0xb: WarnUnimpl::Core_to_extension_transfer(); + default: decode HTOPCODE_4 { + 0x0: WarnUnimpl::mcr(); // mcr2 + 0x1: WarnUnimpl::mrc(); // mrc2 + } + } + } + 0x3: WarnUnimpl::Advanced_SIMD(); + default: decode LTCOPROC { + 0xa, 0xb: decode HTOPCODE_9_4 { + 0x00: WarnUnimpl::undefined(); + 0x04: WarnUnimpl::mcrr(); // mcrr2 + 0x05: WarnUnimpl::mrrc(); // mrrc2 + 0x02, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, + 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e: + WarnUnimpl::stc(); // stc2 + 0x03, 0x07, 0x09, 0x0b, 0x0d, 0x0f, 0x11, + 0x13, 0x15, 0x17, 0x19, 0x1b, 0x1d, 0x1f: + decode HTRN { + 0xf: WarnUnimpl::ldc(); // ldc2 (literal) + default: WarnUnimpl::ldc(); // ldc2 (immediate) + } + } + default: decode HTOPCODE_9_5 { + 0x00: WarnUnimpl::undefined(); + 0x02: WarnUnimpl::SIMD_VFP_64_bit_core_extension_transfer(); + 0x01, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f: + WarnUnimpl::Extension_register_load_store_instruction(); + } + } + } + } + } +} |