[PATCH] rs6000: Fix UNORDERED without NaNs, for DFP (PR92573)

[Segher Boessenkool]

This is the analogue of r278103, but for DFP.

Committing to trunk.


Segher


2019-11-20  Segher Boessenkool  <seg...@kernel.crashing.org>

        PR target/92573
        * config/rs6000/dfp.md (dfptstsfi_<code>_<mode> for DFP_TEST and DDTD):
        Handle UNORDERED if !HONOR_NANS.

---
 gcc/config/rs6000/dfp.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gcc/config/rs6000/dfp.md b/gcc/config/rs6000/dfp.md
index 659b3c9..687858c 100644
--- a/gcc/config/rs6000/dfp.md
+++ b/gcc/config/rs6000/dfp.md
@@ -289,6 +289,12 @@ (define_expand "dfptstsfi_<code>_<mode>"
   ]
   "TARGET_P9_MISC"
 {
+  if (<CODE> == UNORDERED && !HONOR_NANS (<MODE>mode))
+    {
+      emit_move_insn (operands[0], const0_rtx);
+      DONE;
+    }
+
   operands[3] = gen_reg_rtx (CCFPmode);
 })
 
-- 
1.8.3.1