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

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.
2022-01-06 15:18:32 -06:00
parent 7fd78da23f
commit 72e2b7fe80
9 changed files with 1040 additions and 608 deletions
--- a/cranelift/codegen/src/isa/aarch64/lower/isle/generated_code.manifest
+++ b/cranelift/codegen/src/isa/aarch64/lower/isle/generated_code.manifest
@@ -1,4 +1,4 @@
 src/clif.isle f176ef3bba99365
 src/prelude.isle babc931e5dc5b4cf
-src/isa/aarch64/inst.isle 36d057f98a944e4
-src/isa/aarch64/lower.isle 43467df9d06b00ac
+src/isa/aarch64/inst.isle 3ae25d431916bb81
+src/isa/aarch64/lower.isle 5715ecb7c7a41164
--- a/cranelift/codegen/src/isa/aarch64/lower/isle/generated_code.rs
+++ b/cranelift/codegen/src/isa/aarch64/lower/isle/generated_code.rs