aarch64: Migrate bitrev/clz/cls/ctz to ISLE (#3658)

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This commit migrates these existing instructions to ISLE from the manual
lowerings implemented today. This was mostly straightforward but while I
was at it I fixed what appeared to be broken translations for I{8,16}
for `clz`, `cls`, and `ctz`. Previously the lowerings would produce
results as-if the input was 32-bits, but now I believe they all
correctly account for the bit-width.

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This commit is contained in:

Alex Crichton

2022-01-06 15:18:32 -06:00

committed by GitHub

parent 7fd78da23f

commit 72e2b7fe80

9 changed files with 1040 additions and 608 deletions

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cranelift/codegen/src/isa/aarch64/lower/isle/generated_code.rs generated

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