f87c61176a
* x64: port `select` using an FP comparison to ISLE This change includes quite a few interlocking parts, required mainly by the current x64 conventions in ISLE: - it adds a way to emit a `cmove` with multiple OR-ing conditions; because x64 ISLE cannot currently safely emit a comparison followed by several jumps, this adds `MachInst::CmoveOr` and `MachInst::XmmCmoveOr` macro instructions. Unfortunately, these macro instructions hide the multi-instruction sequence in `lower.isle` - to properly keep track of what instructions consume and produce flags, @cfallin added a way to pass around variants of `ConsumesFlags` and `ProducesFlags`--these changes affect all backends - then, to lower the `fcmp + select` CLIF, this change adds several `cmove*_from_values` helpers that perform all of the awkward conversions between `Value`, `ValueReg`, `Reg`, and `Gpr/Xmm`; one upside is that now these lowerings have much-improved documentation explaining why the various `FloatCC` and `CC` choices are made the the way they are. Co-authored-by: Chris Fallin <chris@cfallin.org>
5 lines
152 B
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5 lines
152 B
Plaintext
src/clif.isle 9ea75a6f790b5c03
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src/prelude.isle 980b300b3ec3e338
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src/isa/aarch64/inst.isle a7f3572a5cf2f201
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src/isa/aarch64/lower.isle 534c135b5f535f33
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