From: Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
Date: Wed, 1 Jul 2015 08:01:57 +0000 (+0000)
Subject: Fix PR target/63408 on the 4.9 branch.
X-Git-Tag: releases/gcc-4.9.4~726
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2828ac4c91f238ebc417ad68746a67e7c9a4f8be;p=thirdparty%2Fgcc.git

Fix PR target/63408 on the 4.9 branch.

2015-07-01  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	Backport from mainline
        2015-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/63408
	* config/arm/arm.c (vfp3_const_double_for_fract_bits): Disable
	for negative numbers.

2015-07-01  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	Backport from mainline
        2015-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/63408
	* gcc.target/arm/pr63408.c: New test.

From-SVN: r225226
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2b921c5b1601..7d1bc628bb2d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2015-07-01  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	Backport from mainline
+        2015-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	PR target/63408
+	* config/arm/arm.c (vfp3_const_double_for_fract_bits): Disable
+	for negative numbers.
+
 2015-06-30  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* config/sparc/leon.md (leon_load): Enable for all LEON variants if
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 4fea1a62f775..4a284eca5c63 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -29812,7 +29812,8 @@ vfp3_const_double_for_fract_bits (rtx operand)
     return 0;
   
   REAL_VALUE_FROM_CONST_DOUBLE (r0, operand);
-  if (exact_real_inverse (DFmode, &r0))
+  if (exact_real_inverse (DFmode, &r0)
+      && !REAL_VALUE_NEGATIVE (r0))
     {
       if (exact_real_truncate (DFmode, &r0))
 	{
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 641bd1f62058..2348e0c941b0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2015-07-01  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	Backport from mainline
+        2015-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	PR target/63408
+	* gcc.target/arm/pr63408.c: New test.
+
 2015-06-27  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/66412
diff --git a/gcc/testsuite/gcc.target/arm/pr63408.c b/gcc/testsuite/gcc.target/arm/pr63408.c
new file mode 100644
index 000000000000..850596bd1803
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/pr63408.c
@@ -0,0 +1,23 @@
+/* { dg-do run }  */
+/* { dg-options "-O2" } */
+void abort (void) __attribute__ ((noreturn));
+float __attribute__((noinline))
+f(float a, int b)
+{
+  return a - (((float)b / 0x7fffffff) * 100);
+}
+
+int
+main (void)
+{
+  float a[] = { 100.0, 0.0, 0.0};
+  int b[] = { 0x7fffffff, 0x7fffffff/100.0f, -0x7fffffff / 100.0f};
+  float c[] = { 0.0, -1.0, 1.0 };
+  int i;
+
+  for (i = 0; i < (sizeof(a) / sizeof (float)); i++)
+    if (f (a[i], b[i]) != c[i])
+	abort ();
+
+  return 0;
+}