This builds on top of the target-independent cost model added in D124269 to add aarch64 specific costs for fptoui_sat and fptosi_sat intrinsics. For many common types they will be legal instructions as the AArch64 instructions will saturate naturally. For unsupported pairs of integer and floating point types, an additional min/max clamp is needed.
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Details
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Diff Detail
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llvm/test/Analysis/CostModel/AArch64/fptoi_sat.ll | ||
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325 | Any idea what's going on with this "400"? Even with our current terrible unrolled codegen, it's still only 50 instructions. |
Any idea what's going on with this "400"? Even with our current terrible unrolled codegen, it's still only 50 instructions.