From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Tue, 4 Aug 2015 17:42:05 +0000 (+0000)
Subject: backport: re PR target/66731 (vnmul, fnmul patterns incorrect for -frounding-math)
X-Git-Tag: releases/gcc-4.9.4~662
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dbfd1a7731b776601c2b40c1cd8147f535f8204;p=thirdparty%2Fgcc.git

backport: re PR target/66731 (vnmul, fnmul patterns incorrect for -frounding-math)

gcc:
	Backport from mainline:
	2015-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	PR target/66731
	* config/aarch64/aarch64.md (fnmul<mode>3): Handle -frounding-math.

gcc/testsuite:

	Backport from mainline r225450:
	2015-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	PR target/66731
	* gcc.target/aarch64/fnmul-1.c: New.
	* gcc.target/aarch64/fnmul-2.c: New.
	* gcc.target/aarch64/fnmul-3.c: New.
	* gcc.target/aarch64/fnmul-4.c: New.

From-SVN: r226592
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 500475664445..41755d790719 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2015-08-04  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	Backport from mainline:
+	2015-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	PR target/66731
+	* config/aarch64/aarch64.md (fnmul<mode>3): Handle -frounding-math.
+
 2015-08-03  Peter Bergner  <bergner@vnet.ibm.com>
 
 	Backport from mainline:
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 1085e4df889d..24bb029bd70b 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -3357,6 +3357,16 @@
         (mult:GPF
 		 (neg:GPF (match_operand:GPF 1 "register_operand" "w"))
 		 (match_operand:GPF 2 "register_operand" "w")))]
+  "TARGET_FLOAT && !flag_rounding_math"
+  "fnmul\\t%<s>0, %<s>1, %<s>2"
+  [(set_attr "type" "fmul<s>")]
+)
+
+(define_insn "*fnmul<mode>3"
+  [(set (match_operand:GPF 0 "register_operand" "=w")
+        (neg:GPF (mult:GPF
+		 (match_operand:GPF 1 "register_operand" "w")
+		 (match_operand:GPF 2 "register_operand" "w"))))]
   "TARGET_FLOAT"
   "fnmul\\t%<s>0, %<s>1, %<s>2"
   [(set_attr "type" "fmul<s>")]
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d31d9411222e..64920695bf4f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2015-08-04  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	Backport from mainline r225450:
+	2015-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	PR target/66731
+	* gcc.target/aarch64/fnmul-1.c: New.
+	* gcc.target/aarch64/fnmul-2.c: New.
+	* gcc.target/aarch64/fnmul-3.c: New.
+	* gcc.target/aarch64/fnmul-4.c: New.
+
 2015-08-03  Peter Bergner  <bergner@vnet.ibm.com>
 
 	Backport from mainline:
diff --git a/gcc/testsuite/gcc.target/aarch64/fnmul-1.c b/gcc/testsuite/gcc.target/aarch64/fnmul-1.c
new file mode 100644
index 000000000000..92945d402ff8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/fnmul-1.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+double
+foo_d (double a, double b)
+{
+  /* { dg-final { scan-assembler "fnmul\\td\[0-9\]+, d\[0-9\]+, d\[0-9\]+" } } */
+  return -a * b;
+}
+
+float
+foo_s (float a, float b)
+{
+  /* { dg-final { scan-assembler "fnmul\\ts\[0-9\]+, s\[0-9\]+, s\[0-9\]+" } } */
+  return -a * b;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/fnmul-2.c b/gcc/testsuite/gcc.target/aarch64/fnmul-2.c
new file mode 100644
index 000000000000..2c80dc8fc3f2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/fnmul-2.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -frounding-math" } */
+
+double
+foo_d (double a, double b)
+{
+  /* { dg-final { scan-assembler "fneg\\td\[0-9\]+, d\[0-9\]+" } } */
+  /* { dg-final { scan-assembler "fmul\\td\[0-9\]+, d\[0-9\]+, d\[0-9\]+" } } */
+  return -a * b;
+}
+
+float
+foo_s (float a, float b)
+{
+  /* { dg-final { scan-assembler "fneg\\ts\[0-9\]+, s\[0-9\]+" } } */
+  /* { dg-final { scan-assembler "fmul\\ts\[0-9\]+, s\[0-9\]+, s\[0-9\]+" } } */
+  return -a * b;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/fnmul-3.c b/gcc/testsuite/gcc.target/aarch64/fnmul-3.c
new file mode 100644
index 000000000000..8b77eec6f2e9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/fnmul-3.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+double
+foo_d (double a, double b)
+{
+  /* { dg-final { scan-assembler "fnmul\\td\[0-9\]+, d\[0-9\]+, d\[0-9\]+" } } */
+  return -(a * b);
+}
+
+float
+foo_s (float a, float b)
+{
+  /* { dg-final { scan-assembler "fnmul\\ts\[0-9\]+, s\[0-9\]+, s\[0-9\]+" } } */
+  return -(a * b);
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/fnmul-4.c b/gcc/testsuite/gcc.target/aarch64/fnmul-4.c
new file mode 100644
index 000000000000..3306210a63f3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/fnmul-4.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -frounding-math" } */
+
+double
+foo_d (double a, double b)
+{
+  /* { dg-final { scan-assembler "fnmul\\td\[0-9\]+, d\[0-9\]+, d\[0-9\]+" } } */
+  return -(a * b);
+}
+
+float
+foo_s (float a, float b)
+{
+  /* { dg-final { scan-assembler "fnmul\\ts\[0-9\]+, s\[0-9\]+, s\[0-9\]+" } } */
+  return -(a * b);
+}