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ARM: Stub out the 16 bit thumb decoder.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:00 -05:00
parent aaa619ea23
commit 7b8525287d
1 changed files with 128 additions and 1 deletions
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129
src/arch/arm/isa/thumbdecode.isa
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@ -41,6 +41,133 @@
// Authors: Gabe Black
1: decode BIGTHUMB {
0: Unknown::unknown();
// 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
}
}
1: Unknown::unknown();
}