Optimize sparc {ceil,floor}{,f} using vis2 'siam' instruction.

	* sysdeps/sparc/sparc-ifunc.h (SPARC_ASM_IFUNC2): New macro.
	(SPARC_ASM_VIS2_IFUNC): Likewise.
	(SPARC_ASM_VIS3_VIS2_IFUNC): Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S: Make
	use of 'siam' instruction.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S:
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S:
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S:
	Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis2.S: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis2.S: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis2.S: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis2.S: New
	file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis2.S: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis2.S: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis2.S: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis2.S: New file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S: Hook in
	new VIS2 routines.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S:
	Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile: Add new VIS2
	routines to libm-sysdep_routines.
	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile: Likewise.

13 files changed, 290 insertions, 112 deletions

diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
index 6349681..561b0ee 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
@@ -1,4 +1,6 @@
 ifeq ($(subdir),math)
+libm-sysdep_routines += s_ceil-vis2 s_ceilf-vis2 \
+			s_floor-vis2 s_floorf-vis2
 ifeq ($(have-as-vis3),yes)
 libm-sysdep_routines += m_copysignf-vis3 m_copysign-vis3 s_ceilf-vis3 \
 			s_ceil-vis3 s_fabs-vis3 s_fabsf-vis3 s_floor-vis3 \
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis2.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis2.S
new file mode 100644
index 0000000..9438800
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis2.S
@@ -0,0 +1,61 @@
+/* ceil function, sparc32 v9 vis2 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David S. Miller <davem@davemloft.net>, 2013.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
+
+	   We add then subtract (or subtract than add if the initial
+	   value was negative) 2**23 to the value, then subtract it
+	   back out.
+
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.  */
+
+#define TWO_FIFTYTWO	0x43300000		/* 2**52 */
+
+#define ZERO		%f10			/* 0.0 */
+#define SIGN_BIT	%f12			/* -0.0 */
+
+ENTRY (__ceil_vis2)
+	sethi	%hi(TWO_FIFTYTWO), %o2
+	sllx	%o0, 32, %o0
+	or	%o0, %o1, %o0
+	stx	%o0, [%sp + 72]
+	sllx	%o2, 32, %o2
+	fzero	ZERO
+	ldd	[%sp + 72], %f0
+	fnegd	ZERO, SIGN_BIT
+	stx	%o2, [%sp + 72]
+	fabsd	%f0, %f14
+	ldd	[%sp + 72], %f16
+	fcmpd	%fcc3, %f14, %f16
+	fmovduge %fcc3, ZERO, %f16
+	fand	%f0, SIGN_BIT, SIGN_BIT
+	for	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 2
+	faddd	%f0, %f16, %f18
+	siam	(1 << 2) | 0
+	fsubd	%f18, %f16, %f18
+	siam	(0 << 2)
+	retl
+	 for	%f18, SIGN_BIT, %f0
+END (__ceil_vis2)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S
index 0c2140d..aebff5c 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S
@@ -19,27 +19,21 @@
 
 #include <sysdep.h>
 
-	/* Since changing the rounding mode is extremely expensive, we
-	   try to round up using a method that is rounding mode
-	   agnostic.
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
 
 	   We add then subtract (or subtract than add if the initial
 	   value was negative) 2**23 to the value, then subtract it
 	   back out.
 
-	   This will clear out the fractional portion of the value.
-	   One of two things will happen for non-whole initial values.
-	   Either the rounding mode will round it up, or it will be
-	   rounded down.  If the value started out whole, it will be
-	   equal after the addition and subtraction.  This means we
-	   can accurately detect with one test whether we need to add
-	   another 1.0 to round it up properly.
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.
 
-	   VIS instructions are used to facilitate the formation of
-	   easier constants, and the propagation of the sign bit.  */
+	   We also use VIS3 moves to avoid using the stack to transfer
+	   values between float and integer registers.  */
 
 #define TWO_FIFTYTWO	0x43300000		/* 2**52 */
-#define ONE_DOT_ZERO	0x3ff00000		/* 1.0 */
 
 #define ZERO		%f10			/* 0.0 */
 #define SIGN_BIT	%f12			/* -0.0 */
@@ -47,32 +41,22 @@
 ENTRY (__ceil_vis3)
 	sethi	%hi(TWO_FIFTYTWO), %o2
 	sllx	%o0, 32, %o0
-	sethi	%hi(ONE_DOT_ZERO), %o3
+	sllx	%o2, 32, %o2
 	or	%o0, %o1, %o0
 	movxtod	%o0, %f0
-	sllx	%o2, 32, %o2
 	fzero	ZERO
-	sllx	%o3, 32, %o3
-
 	fnegd	ZERO, SIGN_BIT
-
 	movxtod	%o2, %f16
 	fabsd	%f0, %f14
-
 	fcmpd	%fcc3, %f14, %f16
-
 	fmovduge %fcc3, ZERO, %f16
 	fand	%f0, SIGN_BIT, SIGN_BIT
-
 	for	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 2
 	faddd	%f0, %f16, %f18
+	siam	(1 << 2) | 0
 	fsubd	%f18, %f16, %f18
-	fcmpd	%fcc2, %f18, %f0
-	movxtod	%o3, %f20
-
-	fmovduge %fcc2, ZERO, %f20
-	faddd	%f18, %f20, %f0
-	fabsd	%f0, %f0
+	siam	(0 << 2)
 	retl
-	 for	%f0, SIGN_BIT, %f0
+	 for	%f18, SIGN_BIT, %f0
 END (__ceil_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S
index 835703f..efc8d49 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S
@@ -1,7 +1,7 @@
 #include <sparc-ifunc.h>
 #include <math_ldbl_opt.h>
 
-SPARC_ASM_VIS3_IFUNC(ceil)
+SPARC_ASM_VIS3_VIS2_IFUNC(ceil)
 
 weak_alias (__ceil, ceil)
 
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis2.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis2.S
new file mode 100644
index 0000000..bc51676
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis2.S
@@ -0,0 +1,58 @@
+/* Float ceil function, sparc32 v9 vis2 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David S. Miller <davem@davemloft.net>, 2013.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
+
+	   We add then subtract (or subtract than add if the initial
+	   value was negative) 2**23 to the value, then subtract it
+	   back out.
+
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.  */
+
+#define TWO_TWENTYTHREE	0x4b000000		/* 2**23 */
+
+#define ZERO		%f10			/* 0.0 */
+#define SIGN_BIT	%f12			/* -0.0 */
+
+ENTRY (__ceilf_vis2)
+	st	%o0, [%sp + 68]
+	sethi	%hi(TWO_TWENTYTHREE), %o2
+	fzeros	ZERO
+	ld	[%sp + 68], %f0
+	fnegs	ZERO, SIGN_BIT
+	st	%o2, [%sp + 68]
+	fabss	%f0, %f14
+	ld	[%sp + 68], %f16
+	fcmps	%fcc3, %f14, %f16
+	fmovsuge %fcc3, ZERO, %f16
+	fands	%f0, SIGN_BIT, SIGN_BIT
+	fors	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 2
+	fadds	%f0, %f16, %f1
+	siam	(1 << 2) | 0
+	fsubs	%f1, %f16, %f1
+	siam	(0 << 2)
+	retl
+	 fors	%f1, SIGN_BIT, %f0
+END (__ceilf_vis2)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S
index 7d30c0b..0a6768c 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S
@@ -19,27 +19,21 @@
 
 #include <sysdep.h>
 
-	/* Since changing the rounding mode is extremely expensive, we
-	   try to round up using a method that is rounding mode
-	   agnostic.
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
 
 	   We add then subtract (or subtract than add if the initial
 	   value was negative) 2**23 to the value, then subtract it
 	   back out.
 
-	   This will clear out the fractional portion of the value.
-	   One of two things will happen for non-whole initial values.
-	   Either the rounding mode will round it up, or it will be
-	   rounded down.  If the value started out whole, it will be
-	   equal after the addition and subtraction.  This means we
-	   can accurately detect with one test whether we need to add
-	   another 1.0 to round it up properly.
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.
 
-	   VIS instructions are used to facilitate the formation of
-	   easier constants, and the propagation of the sign bit.  */
+	   We also use VIS3 moves to avoid using the stack to transfer
+	   values between float and integer registers.  */
 
 #define TWO_TWENTYTHREE	0x4b000000		/* 2**23 */
-#define ONE_DOT_ZERO	0x3f800000		/* 1.0 */
 
 #define ZERO		%f10			/* 0.0 */
 #define SIGN_BIT	%f12			/* -0.0 */
@@ -47,28 +41,19 @@
 ENTRY (__ceilf_vis3)
 	movwtos	%o0, %f0
 	sethi	%hi(TWO_TWENTYTHREE), %o2
-	sethi	%hi(ONE_DOT_ZERO), %o3
 	fzeros	ZERO
-
 	fnegs	ZERO, SIGN_BIT
-
 	movwtos	%o2, %f16
 	fabss	%f0, %f14
-
 	fcmps	%fcc3, %f14, %f16
-
 	fmovsuge %fcc3, ZERO, %f16
 	fands	%f0, SIGN_BIT, SIGN_BIT
-
 	fors	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 2
 	fadds	%f0, %f16, %f1
+	siam	(1 << 2) | 0
 	fsubs	%f1, %f16, %f1
-	fcmps	%fcc2, %f1, %f0
-	movwtos	%o3, %f9
-
-	fmovsuge %fcc2, ZERO, %f9
-	fadds	%f1, %f9, %f0
-	fabss	%f0, %f0
+	siam	(0 << 2)
 	retl
-	 fors	%f0, SIGN_BIT, %f0
+	 fors	%f1, SIGN_BIT, %f0
 END (__ceilf_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S
index 3047dd8..1c72a57 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S
@@ -1,6 +1,6 @@
 #include <sparc-ifunc.h>
 
-SPARC_ASM_VIS3_IFUNC(ceilf)
+SPARC_ASM_VIS3_VIS2_IFUNC(ceilf)
 
 weak_alias (__ceilf, ceilf)
 
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis2.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis2.S
new file mode 100644
index 0000000..3b5e8fd
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis2.S
@@ -0,0 +1,61 @@
+/* floor function, sparc32 v9 vis2 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David S. Miller <davem@davemloft.net>, 2013.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
+
+	   We add then subtract (or subtract than add if the initial
+	   value was negative) 2**23 to the value, then subtract it
+	   back out.
+
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.  */
+
+#define TWO_FIFTYTWO	0x43300000		/* 2**52 */
+
+#define ZERO		%f10			/* 0.0 */
+#define SIGN_BIT	%f12			/* -0.0 */
+
+ENTRY (__floor_vis2)
+	sethi	%hi(TWO_FIFTYTWO), %o2
+	sllx	%o0, 32, %o0
+	or	%o0, %o1, %o0
+	stx	%o0, [%sp + 72]
+	sllx	%o2, 32, %o2
+	fzero	ZERO
+	ldd	[%sp + 72], %f0
+	fnegd	ZERO, SIGN_BIT
+	stx	%o2, [%sp + 72]
+	fabsd	%f0, %f14
+	ldd	[%sp + 72], %f16
+	fcmpd	%fcc3, %f14, %f16
+	fmovduge %fcc3, ZERO, %f16
+	fand	%f0, SIGN_BIT, SIGN_BIT
+	for	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 3
+	faddd	%f0, %f16, %f18
+	siam	(1 << 2) | 0
+	fsubd	%f18, %f16, %f18
+	siam	(0 << 2)
+	retl
+	 for	%f18, SIGN_BIT, %f0
+END (__floor_vis2)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S
index 8445f1d..41fdfac 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S
@@ -19,27 +19,21 @@
 
 #include <sysdep.h>
 
-	/* Since changing the rounding mode is extremely expensive, we
-	   try to round up using a method that is rounding mode
-	   agnostic.
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
 
 	   We add then subtract (or subtract than add if the initial
 	   value was negative) 2**23 to the value, then subtract it
 	   back out.
 
-	   This will clear out the fractional portion of the value.
-	   One of two things will happen for non-whole initial values.
-	   Either the rounding mode will round it up, or it will be
-	   rounded down.  If the value started out whole, it will be
-	   equal after the addition and subtraction.  This means we
-	   can accurately detect with one test whether we need to add
-	   another 1.0 to round it up properly.
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.
 
-	   VIS instructions are used to facilitate the formation of
-	   easier constants, and the propagation of the sign bit.  */
+	   We also use VIS3 moves to avoid using the stack to transfer
+	   values between float and integer registers.  */
 
 #define TWO_FIFTYTWO	0x43300000		/* 2**52 */
-#define ONE_DOT_ZERO	0x3ff00000		/* 1.0 */
 
 #define ZERO		%f10			/* 0.0 */
 #define SIGN_BIT	%f12			/* -0.0 */
@@ -47,32 +41,22 @@
 ENTRY (__floor_vis3)
 	sethi	%hi(TWO_FIFTYTWO), %o2
 	sllx	%o0, 32, %o0
-	sethi	%hi(ONE_DOT_ZERO), %o3
+	sllx	%o2, 32, %o2
 	or	%o0, %o1, %o0
 	movxtod	%o0, %f0
-	sllx	%o2, 32, %o2
 	fzero	ZERO
-	sllx	%o3, 32, %o3
-
 	fnegd	ZERO, SIGN_BIT
-
 	movxtod	%o2, %f16
 	fabsd	%f0, %f14
-
 	fcmpd	%fcc3, %f14, %f16
-
 	fmovduge %fcc3, ZERO, %f16
 	fand	%f0, SIGN_BIT, SIGN_BIT
-
 	for	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 3
 	faddd	%f0, %f16, %f18
+	siam	(1 << 2) | 0
 	fsubd	%f18, %f16, %f18
-	fcmpd	%fcc2, %f18, %f0
-	movxtod	%o3, %f20
-
-	fmovdule %fcc2, ZERO, %f20
-	fsubd	%f18, %f20, %f0
-	fabsd	%f0, %f0
+	siam	(0 << 2)
 	retl
-	 for	%f0, SIGN_BIT, %f0
+	 for	%f18, SIGN_BIT, %f0
 END (__floor_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S
index 37aeb43..1fe4b95 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S
@@ -1,7 +1,7 @@
 #include <sparc-ifunc.h>
 #include <math_ldbl_opt.h>
 
-SPARC_ASM_VIS3_IFUNC(floor)
+SPARC_ASM_VIS3_VIS2_IFUNC(floor)
 
 weak_alias (__floor, floor)
 
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis2.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis2.S
new file mode 100644
index 0000000..4f73121
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis2.S
@@ -0,0 +1,58 @@
+/* Float floor function, sparc32 v9 vis2 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David S. Miller <davem@davemloft.net>, 2013.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
+
+	   We add then subtract (or subtract than add if the initial
+	   value was negative) 2**23 to the value, then subtract it
+	   back out.
+
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.  */
+
+#define TWO_TWENTYTHREE	0x4b000000		/* 2**23 */
+
+#define ZERO		%f10			/* 0.0 */
+#define SIGN_BIT	%f12			/* -0.0 */
+
+ENTRY (__floorf_vis2)
+	st	%o0, [%sp + 68]
+	sethi	%hi(TWO_TWENTYTHREE), %o2
+	fzeros	ZERO
+	ld	[%sp + 68], %f0
+	fnegs	ZERO, SIGN_BIT
+	st	%o2, [%sp + 68]
+	fabss	%f0, %f14
+	ld	[%sp + 68], %f16
+	fcmps	%fcc3, %f14, %f16
+	fmovsuge %fcc3, ZERO, %f16
+	fands	%f0, SIGN_BIT, SIGN_BIT
+	fors	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 3
+	fadds	%f0, %f16, %f1
+	siam	(1 << 2) | 0
+	fsubs	%f1, %f16, %f1
+	siam	(0 << 2)
+	retl
+	 fors	%f1, SIGN_BIT, %f0
+END (__floorf_vis2)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S
index 133a0a4..fe2d2da 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S
@@ -19,27 +19,21 @@
 
 #include <sysdep.h>
 
-	/* Since changing the rounding mode is extremely expensive, we
-	   try to round up using a method that is rounding mode
-	   agnostic.
+	/* 'siam' (Set Interval Arithmetic Mode) is used to quickly override
+	   the rounding mode during this routine.
 
 	   We add then subtract (or subtract than add if the initial
 	   value was negative) 2**23 to the value, then subtract it
 	   back out.
 
-	   This will clear out the fractional portion of the value.
-	   One of two things will happen for non-whole initial values.
-	   Either the rounding mode will round it up, or it will be
-	   rounded down.  If the value started out whole, it will be
-	   equal after the addition and subtraction.  This means we
-	   can accurately detect with one test whether we need to add
-	   another 1.0 to round it up properly.
+	   This will clear out the fractional portion of the value and,
+	   with suitable 'siam' initiated rouding mode settings, round
+	   the final result in the proper direction.
 
-	   VIS instructions are used to facilitate the formation of
-	   easier constants, and the propagation of the sign bit.  */
+	   We also use VIS3 moves to avoid using the stack to transfer
+	   values between float and integer registers.  */
 
 #define TWO_TWENTYTHREE	0x4b000000		/* 2**23 */
-#define ONE_DOT_ZERO	0x3f800000		/* 1.0 */
 
 #define ZERO		%f10			/* 0.0 */
 #define SIGN_BIT	%f12			/* -0.0 */
@@ -47,28 +41,19 @@
 ENTRY (__floorf_vis3)
 	movwtos	%o0, %f0
 	sethi	%hi(TWO_TWENTYTHREE), %o2
-	sethi	%hi(ONE_DOT_ZERO), %o3
 	fzeros	ZERO
-
 	fnegs	ZERO, SIGN_BIT
-
 	movwtos	%o2, %f16
 	fabss	%f0, %f14
-
 	fcmps	%fcc3, %f14, %f16
-
 	fmovsuge %fcc3, ZERO, %f16
 	fands	%f0, SIGN_BIT, SIGN_BIT
-
 	fors	%f16, SIGN_BIT, %f16
+	siam	(1 << 2) | 3
 	fadds	%f0, %f16, %f1
+	siam	(1 << 2) | 0
 	fsubs	%f1, %f16, %f1
-	fcmps	%fcc2, %f1, %f0
-	movwtos	%o3, %f9
-
-	fmovsule %fcc2, ZERO, %f9
-	fsubs	%f1, %f9, %f0
-	fabss	%f0, %f0
+	siam	(0 << 2)
 	retl
-	 fors	%f0, SIGN_BIT, %f0
+	 fors	%f1, SIGN_BIT, %f0
 END (__floorf_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S
index 31cda38..d2a83cb 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S
@@ -1,6 +1,6 @@
 #include <sparc-ifunc.h>
 
-SPARC_ASM_VIS3_IFUNC(floorf)
+SPARC_ASM_VIS3_VIS2_IFUNC(floorf)
 
 weak_alias (__floorf, floorf)