Cranelift: ISLE: aarch64: fix imm12_from_negated_value for i32, i16 (#6078)

* Fix the semantics of imm12_from_negated_value, swapping to a partial term + rule * wrapping_neg
2023-03-21 15:16:25 -04:00
parent 59d46c2fec
commit 13be5618a7
6 changed files with 140 additions and 28 deletions
--- a/cranelift/codegen/src/prelude.isle
+++ b/cranelift/codegen/src/prelude.isle
@@ -93,6 +93,9 @@
 (decl pure i64_as_u64 (i64) u64)
 (extern constructor i64_as_u64 i64_as_u64)

+(decl pure i64_neg (i64) i64)
+(extern constructor i64_neg i64_neg)
+
 (decl u128_as_u64 (u64) u128)
 (extern extractor u128_as_u64 u128_as_u64)