Add standard expansions for fcopysign.

This is also just a sign bit manipulation.
2017-09-25 15:17:32 -07:00
parent 6bec5f8507
commit 79968a2325
3 changed files with 20 additions and 2 deletions
--- a/lib/cretonne/meta/base/legalize.py
+++ b/lib/cretonne/meta/base/legalize.py
@@ -226,3 +226,11 @@ for ty,             minus_zero in [
                b << minus_zero,
                a << bxor(x, b),
            ))
+    expand.legalize(
+            a << insts.fcopysign.bind(ty)(x, y),
+            Rtl(
+                b << minus_zero,
+                a1 << band_not(x, b),
+                a2 << band(y, b),
+                a << bor(a1, a2)
+            ))