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T32: Add ASIMD instructions

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This commit is contained in:
MerryMage
2021-05-03 23:30:59 +01:00
parent d1e62b9993
commit a5a210a9a5
2 changed files with 44 additions and 0 deletions
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19
src/frontend/A32/translate/translate_thumb.cpp
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@@ -9,6 +9,7 @@
#include "common/assert.h"
#include "common/bit_util.h"
#include "frontend/A32/decoder/asimd.h"
#include "frontend/A32/decoder/thumb16.h"
#include "frontend/A32/decoder/thumb32.h"
#include "frontend/A32/decoder/vfp.h"
@@ -64,6 +65,20 @@ std::tuple<u32, ThumbInstSize> ReadThumbInstruction(u32 arm_pc, MemoryReadCodeFu
return std::make_tuple(static_cast<u32>((first_part << 16) | second_part), ThumbInstSize::Thumb32);
}
// Convert from thumb ASIMD format to ARM ASIMD format.
u32 ConvertASIMDInstruction(u32 thumb_instruction) {
if ((thumb_instruction & 0xEF000000) == 0xEF000000) {
const bool U = Common::Bit<28>(thumb_instruction);
return 0xF2000000 | (U << 24) | (thumb_instruction & 0x00FFFFFF);
}
if ((thumb_instruction & 0xFF000000) == 0xF9000000) {
return 0xF4000000 | (thumb_instruction & 0x00FFFFFF);
}
return 0xF7F0A000; // UDF
}
} // local namespace
IR::Block TranslateThumb(LocationDescriptor descriptor, MemoryReadCodeFuncType memory_read_code, const TranslationOptions& options) {
@@ -92,6 +107,8 @@ IR::Block TranslateThumb(LocationDescriptor descriptor, MemoryReadCodeFuncType m
} else if ((thumb_instruction & 0xEC000000) == 0xEC000000) {
if (const auto vfp_decoder = DecodeVFP<TranslatorVisitor>(thumb_instruction)) {
should_continue = vfp_decoder->get().call(visitor, thumb_instruction);
} else if (const auto asimd_decoder = DecodeASIMD<TranslatorVisitor>(ConvertASIMDInstruction(thumb_instruction))) {
should_continue = asimd_decoder->get().call(visitor, ConvertASIMDInstruction(thumb_instruction));
} else {
should_continue = visitor.thumb32_UDF();
}
@@ -144,6 +161,8 @@ bool TranslateSingleThumbInstruction(IR::Block& block, LocationDescriptor descri
} else if ((thumb_instruction & 0xEC000000) == 0xEC000000) {
if (const auto vfp_decoder = DecodeVFP<TranslatorVisitor>(thumb_instruction)) {
should_continue = vfp_decoder->get().call(visitor, thumb_instruction);
} else if (const auto asimd_decoder = DecodeASIMD<TranslatorVisitor>(ConvertASIMDInstruction(thumb_instruction))) {
should_continue = asimd_decoder->get().call(visitor, ConvertASIMDInstruction(thumb_instruction));
} else {
should_continue = visitor.thumb32_UDF();
}