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A32: Implement ARM-mode UBFX

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This commit is contained in:
Lioncash
2019-04-20 12:47:34 -04:00
committed by MerryMage
parent 2970b34e3c
commit 47218ee65d
5 changed files with 39 additions and 0 deletions
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11
tests/A32/fuzz_arm.cpp
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@@ -1093,11 +1093,22 @@ TEST_CASE("Test ARM misc instructions", "[JitX64][A32]") {
// R15 as Rd, or Rm is UNPREDICTABLE
return Bits<0, 3>(instr) != 0b1111 && Bits<12, 15>(instr) != 0b1111;
};
const auto is_ubfx_valid = [](u32 instr) {
const u32 lsb = Bits<7, 11>(instr);
const u32 widthm1 = Bits<16, 20>(instr);
const u32 msb = lsb + widthm1;
// Rd or Rn as R15 or the case where msb > 32 is UNPREDICTABLE.
return Bits<0, 3>(instr) != 0b1111 &&
Bits<12, 15>(instr) != 0b1111 &&
msb < Dynarmic::Common::BitSize<u32>();
};
const std::array instructions = {
InstructionGenerator("cccc0111110vvvvvddddvvvvv0011111", is_bfc_bfi_valid), // BFC
InstructionGenerator("cccc0111110vvvvvddddvvvvv001nnnn", is_bfc_bfi_valid), // BFI
InstructionGenerator("cccc000101101111dddd11110001mmmm", is_clz_valid), // CLZ
InstructionGenerator("cccc0111111wwwwwddddvvvvv101nnnn", is_ubfx_valid), // UBFX
};
FuzzJitArm(1, 1, 10000, [&instructions]() -> u32 {