From 5fba7efc6cd96ae81df55e06e3fc9a9cbd7f3f3a Mon Sep 17 00:00:00 2001
From: Segher Boessenkool <segher@kernel.crashing.org>
Date: Tue, 12 Nov 2019 22:02:03 +0100
Subject: [PATCH] rs6000: Handle unordered for xscmpexp[dq]p without NaNs
 (PR92449)

	* config/rs6000/vsx.md (xscmpexpdp_<code> for CMP_TEST): Handle
	UNORDERED if !HONOR_NANS (DFmode).
	(xscmpexpqp_<code>_<mode> for CMP_TEST and IEEE128): Handle UNORDERED
	if !HONOR_NANS (<MODE>mode).

From-SVN: r278103
---
 gcc/ChangeLog            |  7 +++++++
 gcc/config/rs6000/vsx.md | 12 ++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d283626d06a..574b5984558 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2019-11-12  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/vsx.md (xscmpexpdp_<code> for CMP_TEST): Handle
+	UNORDERED if !HONOR_NANS (DFmode).
+	(xscmpexpqp_<code>_<mode> for CMP_TEST and IEEE128): Handle UNORDERED
+	if !HONOR_NANS (<MODE>mode).
+
 2019-11-12  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-cp.c (ignore_edge_p): Also look for optimize flag.
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index aa13b20f574..3aa8e215c11 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -4526,6 +4526,12 @@
 		     (const_int 0)))]
   "TARGET_P9_VECTOR"
 {
+  if (<CODE> == UNORDERED && !HONOR_NANS (DFmode))
+    {
+      emit_move_insn (operands[0], const0_rtx);
+      DONE;
+    }
+
   operands[3] = gen_reg_rtx (CCFPmode);
 })
 
@@ -4554,6 +4560,12 @@
 		     (const_int 0)))]
   "TARGET_P9_VECTOR"
 {
+  if (<CODE> == UNORDERED && !HONOR_NANS (<MODE>mode))
+    {
+      emit_move_insn (operands[0], const0_rtx);
+      DONE;
+    }
+
   operands[3] = gen_reg_rtx (CCFPmode);
 })
 
-- 
2.30.2