x64: Port fdemote and fvdemote to ISLE (#4449)

https://github.com/bytecodealliance/wasmtime/pull/4449
2022-07-18 14:26:23 -07:00
parent 638dc4e0b3
commit b519c975cb
4 changed files with 115 additions and 37 deletions
--- a/cranelift/codegen/src/isa/x64/lower.isle
+++ b/cranelift/codegen/src/isa/x64/lower.isle
@@ -2351,6 +2351,14 @@
 (rule (lower (has_type $F64X2 (fvpromote_low x)))
      (x64_cvtps2pd (put_in_xmm x)))

+;; Rules for `fdemote` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(rule (lower (has_type $F32 (fdemote x)))
+      (x64_cvtsd2ss x))
+
+;; Rules for `fvdemote` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(rule (lower (has_type $F32X4 (fvdemote x)))
+      (x64_cvtpd2ps x))
+
 ;; Rules for `fmin` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

 (rule (lower (has_type $F32 (fmin x y)))