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Unified Diff: src/arm/disasm-arm.cc

Issue 1698483002: [arm][arm64] Improve CountTrailingZero implementation. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: comments addressed Created 4 years, 10 months ago
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Index: src/arm/disasm-arm.cc
diff --git a/src/arm/disasm-arm.cc b/src/arm/disasm-arm.cc
index 66b7f4584943b3b9dc9fd3aa9749d39d5039a6a0..f9b0496714b216e6015a71287ea9017168486e95 100644
--- a/src/arm/disasm-arm.cc
+++ b/src/arm/disasm-arm.cc
@@ -1188,7 +1188,13 @@ void Decoder::DecodeType3(Instruction* instr) {
}
}
} else {
- UNREACHABLE();
+ // PU == 0b01, BW == 0b11, Bits(9, 6) != 0b0001
+ if ((instr->Bits(20, 16) == 0x1f) &&
+ (instr->Bits(11, 4) == 0xf3)) {
+ Format(instr, "rbit'cond 'rd, 'rm");
+ } else {
+ UNREACHABLE();
+ }
}
break;
}
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