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authorGabe Black <gblack@eecs.umich.edu>2010-06-02 12:58:00 -0500
committerGabe Black <gblack@eecs.umich.edu>2010-06-02 12:58:00 -0500
commitcef2e8eceec7829523c2b69e0d37f31b89b87d72 (patch)
tree8577f074d0f4c6cc5ceea5cb29dc95554d326553 /src/arch/arm
parent659f8d021f245acc13773466d0818a7c4d850611 (diff)
downloadgem5-cef2e8eceec7829523c2b69e0d37f31b89b87d72.tar.xz
ARM: Stub out the 32 bit Thumb portion of the decoder.
Diffstat (limited to 'src/arch/arm')
-rw-r--r--src/arch/arm/isa/thumbdecode.isa207
1 files changed, 206 insertions, 1 deletions
diff --git a/src/arch/arm/isa/thumbdecode.isa b/src/arch/arm/isa/thumbdecode.isa
index 6277e7b59..d87374069 100644
--- a/src/arch/arm/isa/thumbdecode.isa
+++ b/src/arch/arm/isa/thumbdecode.isa
@@ -169,5 +169,210 @@
0x0: WarnUnimpl::b(); // unconditional
}
}
- 1: Unknown::unknown();
+
+ // 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 "vfpdecode.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: WarnUnimpl::Data_processing_modified_immediate();
+ 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: WarnUnimpl::Store_single_data_item();
+ 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: WarnUnimpl::Load_word();
+ 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();
+ }
+ }
+ }
+ }
+ }
}