Fix powerpc32 ceil, rint etc. on sNaN input (bug 20160).

The powerpc32 versions of ceil, floor, round, trunc, rint, nearbyint
and their float versions return sNaN for sNaN input when they should
return qNaN.  This patch fixes them to add a NaN argument to itself to
quiet sNaNs before returning.  The powerpc64 versions, which have the
same bug, will be addressed separately.

Tested for powerpc32.

	[BZ #20160]
	* sysdeps/powerpc/powerpc32/fpu/s_ceil.S (__ceil): Add NaN
	argument to itself before returning the result.
	* sysdeps/powerpc/powerpc32/fpu/s_ceilf.S (__ceilf): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_floor.S (__floor): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_floorf.S (__floorf): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S (__nearbyint):
	Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S (__nearbyintf):
	Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_rint.S (__rint): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_rintf.S (__rintf): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_round.S (__round): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_roundf.S (__roundf): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_trunc.S (__trunc): Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_truncf.S (__truncf): Likewise.

13 files changed, 103 insertions, 12 deletions

diff --git a/ChangeLog b/ChangeLog
index 812f0a51ab..e652a0387c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2016-05-27  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #20160]
+	* sysdeps/powerpc/powerpc32/fpu/s_ceil.S (__ceil): Add NaN
+	argument to itself before returning the result.
+	* sysdeps/powerpc/powerpc32/fpu/s_ceilf.S (__ceilf): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_floor.S (__floor): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_floorf.S (__floorf): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S (__nearbyint):
+	Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S (__nearbyintf):
+	Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_rint.S (__rint): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_rintf.S (__rintf): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_round.S (__round): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_roundf.S (__roundf): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_trunc.S (__trunc): Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_truncf.S (__truncf): Likewise.
+
 2016-05-27  Paul E. Murphy  <murphyp@linux.vnet.ibm.com>
 
 	* libm-test.inc: Replace usage of M_El with
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_ceil.S b/sysdeps/powerpc/powerpc32/fpu/s_ceil.S
index 07d031e22e..161295962d 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_ceil.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_ceil.S
@@ -44,7 +44,7 @@ ENTRY (__ceil)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,2		/* Set rounding mode toward +inf.  */
 	ble-	cr6,.L4
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
@@ -64,6 +64,12 @@ ENTRY (__ceil)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 	END (__ceil)
 
 weak_alias (__ceil, ceil)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_ceilf.S b/sysdeps/powerpc/powerpc32/fpu/s_ceilf.S
index 3987e24e41..63ffd5f8ec 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_ceilf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_ceilf.S
@@ -43,7 +43,7 @@ ENTRY (__ceilf)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,2		/* Set rounding mode toward +inf.  */
 	ble-	cr6,.L4
 	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
@@ -63,6 +63,12 @@ ENTRY (__ceilf)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 	END (__ceilf)
 
 weak_alias (__ceilf, ceilf)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_floor.S b/sysdeps/powerpc/powerpc32/fpu/s_floor.S
index b951666bd7..269e1dc808 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_floor.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_floor.S
@@ -44,7 +44,7 @@ ENTRY (__floor)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,3		/* Set rounding mode toward -inf.  */
 	ble-	cr6,.L4
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
@@ -64,6 +64,12 @@ ENTRY (__floor)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 	END (__floor)
 
 weak_alias (__floor, floor)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_floorf.S b/sysdeps/powerpc/powerpc32/fpu/s_floorf.S
index 64b87b1cc1..642d910561 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_floorf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_floorf.S
@@ -43,7 +43,7 @@ ENTRY (__floorf)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,3		/* Set rounding mode toward -inf.  */
 	ble-	cr6,.L4
 	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
@@ -63,6 +63,12 @@ ENTRY (__floorf)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 	END (__floorf)
 
 weak_alias (__floorf, floorf)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S b/sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S
index 68e3182b0d..fee7e9e8b0 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_nearbyint.S
@@ -49,7 +49,7 @@ ENTRY (__nearbyint)
 	fabs	fp0,fp1
 	fsub    fp12,fp13,fp13	/* generate 0.0  */
 	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO52 */
-	bgelr	cr7
+	bge	cr7,.L10
 	fcmpu	cr7,fp1,fp12	/* if (x > 0.0 */
 	ble	cr7,L(lessthanzero)
 	mffs	fp11
@@ -68,6 +68,12 @@ L(lessthanzero):
 	fnabs	fp1,fp1		/* if (x == 0.0) */
 	mtfsf	0xff,fp11	/* Restore FE_INEXACT state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 END (__nearbyint)
 
 weak_alias (__nearbyint, nearbyint)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S b/sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S
index 107b035a24..7490e9c6d3 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_nearbyintf.S
@@ -48,7 +48,7 @@ ENTRY (__nearbyintf)
 	fabs	fp0,fp1
 	fsub    fp12,fp13,fp13		/* generate 0.0  */
 	fcmpu	cr7,fp0,fp13		/* if (fabs(x) > TWO23 */
-	bgelr	cr7
+	bge	cr7,.L10
 	fcmpu	cr7,fp1,fp12		/* if (x > 0.0 */
 	ble	cr7,L(lessthanzero)
 	mffs	fp11
@@ -67,6 +67,12 @@ L(lessthanzero):
 	fnabs	fp1,fp1			/* if (x == 0.0) */
 	mtfsf	0xff,fp11		/* Restore FE_INEXACT state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 END (__nearbyintf)
 
 weak_alias (__nearbyintf, nearbyintf)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_rint.S b/sysdeps/powerpc/powerpc32/fpu/s_rint.S
index 5d78f3a5fc..8124feec8d 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_rint.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_rint.S
@@ -45,7 +45,7 @@ ENTRY (__rint)
 	fsub	fp12,fp13,fp13	/* generate 0.0  */
 	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO52)  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr	cr7
+	bnl	cr7,.L10
 	bng	cr6,.L4
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
 	fsub	fp1,fp1,fp13	/* x-= TWO52;  */
@@ -57,6 +57,12 @@ ENTRY (__rint)
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
 	fnabs	fp1,fp1		/* if (x == 0.0)  */
 	blr			/* x = -0.0; */
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 	END (__rint)
 
 weak_alias (__rint, rint)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_rintf.S b/sysdeps/powerpc/powerpc32/fpu/s_rintf.S
index 94b7045da6..1fd4c2ab0f 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_rintf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_rintf.S
@@ -41,7 +41,7 @@ ENTRY (__rintf)
 	fsubs	fp12,fp13,fp13	/* generate 0.0  */
 	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO23)  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr	cr7
+	bnl	cr7,.L10
 	bng	cr6,.L4
 	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
 	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
@@ -53,6 +53,12 @@ ENTRY (__rintf)
 	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
 	fnabs	fp1,fp1		/* if (x == 0.0)  */
 	blr			/* x = -0.0; */
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 	END (__rintf)
 
 weak_alias (__rintf, rintf)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_round.S b/sysdeps/powerpc/powerpc32/fpu/s_round.S
index ae25364bd9..c224e0c2e3 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_round.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_round.S
@@ -57,7 +57,7 @@ ENTRY (__round)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,1		/* Set rounding mode toward 0.  */
 #ifdef SHARED
 	lfs	fp10,.LC1-.LC0(r9)
@@ -85,6 +85,12 @@ ENTRY (__round)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 	END (__round)
 
 weak_alias (__round, round)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S b/sysdeps/powerpc/powerpc32/fpu/s_roundf.S
index f63248138f..d1341c7149 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_roundf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_roundf.S
@@ -56,7 +56,7 @@ ENTRY (__roundf )
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,1		/* Set rounding mode toward 0.  */
 #ifdef SHARED
 	lfs	fp10,.LC1-.LC0(r9)
@@ -83,6 +83,12 @@ ENTRY (__roundf )
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 	END (__roundf)
 
 weak_alias (__roundf, roundf)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_trunc.S b/sysdeps/powerpc/powerpc32/fpu/s_trunc.S
index 260b4fd336..a4e9a2d9d6 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_trunc.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_trunc.S
@@ -51,7 +51,7 @@ ENTRY (__trunc)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,1		/* Set rounding toward 0 mode.  */
 	ble-	cr6,.L4
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
@@ -71,6 +71,12 @@ ENTRY (__trunc)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadd	fp1,fp1,fp1
+	blr
 	END (__trunc)
 
 weak_alias (__trunc, trunc)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_truncf.S b/sysdeps/powerpc/powerpc32/fpu/s_truncf.S
index 6c2c959e71..6006f1553b 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_truncf.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_truncf.S
@@ -50,7 +50,7 @@ ENTRY (__truncf)
 	mffs	fp11		/* Save current FPU rounding mode and
 				   "inexact" state.  */
 	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnllr-	cr7
+	bnl-	cr7,.L10
 	mtfsfi	7,1		/* Set rounding toward 0 mode.  */
 	ble-	cr6,.L4
 	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
@@ -70,6 +70,12 @@ ENTRY (__truncf)
 	mtfsf	0xff,fp11	/* Restore previous rounding mode and
 				   "inexact" state.  */
 	blr
+.L10:
+	/* Ensure sNaN input is converted to qNaN.  */
+	fcmpu	cr7,fp1,fp1
+	beqlr	cr7
+	fadds	fp1,fp1,fp1
+	blr
 	END (__truncf)
 
 weak_alias (__truncf, truncf)