sparc: remove fdim sparc specific implementations

The fdim and fdimf functions on sparc do not fully follow the standard
and do not set errno to ERANGE when the result overflows. Since glibc
2.24 this causes the two following tests to fail:

  Failure: fdim (max_value, -max_value): errno set to 0, expected 34 (ERANGE)
  Failure: fdim_upward (max_value, -max_value): errno set to 0, expected 34 (ERANGE)

It happens that using GCC with the generic C code generates very similar
code to the sparc specific implementations. Therefore this patches
remove them. Note it might still worth adding a vis3 specific version of
fdim on sparc32/sparcv9, this is done in a following patch to ease
backporting.

Changelog:
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
	Remove s_fdimf-vis3, s_fdim-vis3.
	* sysdeps/sparc/sparc32/fpu/s_fdim.S: Delete file.
	* sysdeps/sparc/sparc32/fpu/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_fdimf.S: Likewise.

(cherry picked from commit 8a9f4eb95894eae7e725e79721ba26fbc5b4ed06)

12 files changed, 18 insertions, 314 deletions

diff --git a/ChangeLog b/ChangeLog
index b9b29b3ab1..acdc443470 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2016-08-05  Aurelien Jarno  <aurelien@aurel32.net>
+
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
+	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
+	Remove s_fdimf-vis3, s_fdim-vis3.
+	* sysdeps/sparc/sparc32/fpu/s_fdim.S: Delete file.
+	* sysdeps/sparc/sparc32/fpu/s_fdimf.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S: Likewise.
+	* sysdeps/sparc/sparc64/fpu/s_fdim.S: Likewise.
+	* sysdeps/sparc/sparc64/fpu/s_fdimf.S: Likewise.
+
 2016-08-02  David S. Miller  <davem@davemloft.net>
 
 	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyint-vis3.S
diff --git a/sysdeps/sparc/sparc32/fpu/s_fdim.S b/sysdeps/sparc/sparc32/fpu/s_fdim.S
deleted file mode 100644
index e93970faae..0000000000
--- a/sysdeps/sparc/sparc32/fpu/s_fdim.S
+++ /dev/null
@@ -1,42 +0,0 @@
-/* Compute positive difference, sparc 32-bit.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-#include <math_ldbl_opt.h>
-
-ENTRY(__fdim)
-	std	%o0, [%sp + 72]
-	std	%o2, [%sp + 80]
-	ldd	[%sp + 72], %f0
-	ldd	[%sp + 80], %f2
-	fcmpd	%f0, %f2
-	st	%g0, [%sp + 72]
-	fbug	1f
-	 st	%g0, [%sp + 76]
-	ldd	[%sp + 72], %f0
-	fnegs	%f0, %f2
-	fmovs	%f1, %f3
-1:	retl
-	 fsubd	%f0, %f2, %f0
-END(__fdim)
-weak_alias (__fdim, fdim)
-
-#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
-compat_symbol (libm, __fdim, fdiml, GLIBC_2_1);
-#endif
diff --git a/sysdeps/sparc/sparc32/fpu/s_fdimf.S b/sysdeps/sparc/sparc32/fpu/s_fdimf.S
deleted file mode 100644
index c3fe8afa98..0000000000
--- a/sysdeps/sparc/sparc32/fpu/s_fdimf.S
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Compute positive difference, sparc 32-bit.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-
-ENTRY(__fdimf)
-	st	%o0, [%sp + 72]
-	st	%o1, [%sp + 76]
-	ld	[%sp + 72], %f0
-	ld	[%sp + 76], %f1
-	fcmps	%f0, %f1
-	fbug	1f
-	 st	%g0, [%sp + 72]
-	ld	[%sp + 72], %f0
-	fnegs	%f0, %f1
-1:	retl
-	 fsubs	%f0, %f1, %f0
-END(__fdimf)
-weak_alias (__fdimf, fdimf)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
index ebbe28b07f..13d3c6db51 100644
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
+++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
@@ -4,8 +4,8 @@ libm-sysdep_routines += m_copysignf-vis3 m_copysign-vis3 s_fabs-vis3 \
 			s_fabsf-vis3 s_llrintf-vis3 s_llrint-vis3 \
 			s_rintf-vis3 s_rint-vis3 w_sqrt-vis3 w_sqrtf-vis3 \
 			s_fminf-vis3 s_fmin-vis3 s_fmaxf-vis3 s_fmax-vis3 \
-			s_fmaf-vis3 s_fma-vis3 s_fdimf-vis3 s_fdim-vis3 \
-			s_nearbyint-vis3 s_nearbyintf-vis3
+			s_fmaf-vis3 s_fma-vis3 s_nearbyint-vis3 \
+			s_nearbyintf-vis3
 sysdep_routines += s_copysignf-vis3 s_copysign-vis3
 endif
 endif
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S
deleted file mode 100644
index 4a479b1a59..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Compute positive difference, sparc 32-bit+v9+vis3.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-
-ENTRY(__fdim_vis3)
-	movwtos	%o0, %f0
-	movwtos	%o1, %f1
-	movwtos	%o2, %f2
-	movwtos	%o3, %f3
-	fcmpd	%f0, %f2
-	fbug	1f
-	 nop
-	fzero	%f0
-	fnegd	%f0, %f2
-1:	retl
-	 fsubd	%f0, %f2, %f0
-END(__fdim_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S
deleted file mode 100644
index 4b13408244..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <sparc-ifunc.h>
-#include <math_ldbl_opt.h>
-
-SPARC_ASM_VIS3_IFUNC(fdim)
-
-weak_alias (__fdim, fdim)
-
-#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
-compat_symbol (libm, __fdim, fdiml, GLIBC_2_1);
-#endif
-
-# undef weak_alias
-# define weak_alias(a, b)
-# undef compat_symbol
-# define compat_symbol(a, b, c, d)
-
-#define __fdim __fdim_generic
-
-#include "../s_fdim.S"
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S
deleted file mode 100644
index 081fc15b62..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Compute positive difference, sparc 32-bit+v9+vis3.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-
-ENTRY(__fdimf_vis3)
-	movwtos	%o0, %f0
-	movwtos	%o1, %f1
-	fcmps	%f0, %f1
-	fbug	1f
-	 nop
-	fzeros	%f0
-	fnegs	%f0, %f1
-1:	retl
-	 fsubs	%f0, %f1, %f0
-END(__fdimf_vis3)
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S
deleted file mode 100644
index 30381d6a59..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <sparc-ifunc.h>
-
-SPARC_ASM_VIS3_IFUNC(fdimf)
-
-weak_alias (__fdimf, fdimf)
-
-# undef weak_alias
-# define weak_alias(a, b)
-
-#define __fdimf __fdimf_generic
-
-#include "../s_fdimf.S"
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S b/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S
deleted file mode 100644
index 37f7f44dfa..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S
+++ /dev/null
@@ -1,40 +0,0 @@
-/* Compute positive difference, sparc 32-bit+v9.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-#include <math_ldbl_opt.h>
-
-ENTRY(__fdim)
-	std	%o0, [%sp + 72]
-	std	%o2, [%sp + 80]
-	ldd	[%sp + 72], %f0
-	ldd	[%sp + 80], %f2
-	fcmpd	%f0, %f2
-	fbug	1f
-	 nop
-	fzero	%f0
-	fnegd	%f0, %f2
-1:	retl
-	 fsubd	%f0, %f2, %f0
-END(__fdim)
-weak_alias (__fdim, fdim)
-
-#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
-compat_symbol (libm, __fdim, fdiml, GLIBC_2_1);
-#endif
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S
deleted file mode 100644
index 9e0e3f21be..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Compute positive difference, sparc 32-bit+v9.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-
-ENTRY(__fdimf)
-	st	%o0, [%sp + 72]
-	st	%o1, [%sp + 76]
-	ld	[%sp + 72], %f0
-	ld	[%sp + 76], %f1
-	fcmps	%f0, %f1
-	fbug	1f
-	 nop
-	fzeros	%f0
-	fnegs	%f0, %f1
-1:	retl
-	 fsubs	%f0, %f1, %f0
-END(__fdimf)
-weak_alias (__fdimf, fdimf)
diff --git a/sysdeps/sparc/sparc64/fpu/s_fdim.S b/sysdeps/sparc/sparc64/fpu/s_fdim.S
deleted file mode 100644
index 7fae72a251..0000000000
--- a/sysdeps/sparc/sparc64/fpu/s_fdim.S
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Compute positive difference, sparc 64-bit.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-#include <math_ldbl_opt.h>
-
-ENTRY(__fdim)
-	fcmpd	%f0, %f2
-	fbug	1f
-	 nop
-	fzero	%f0
-	fnegd	%f0, %f2
-1:	retl
-	 fsubd	%f0, %f2, %f0
-END(__fdim)
-weak_alias (__fdim, fdim)
diff --git a/sysdeps/sparc/sparc64/fpu/s_fdimf.S b/sysdeps/sparc/sparc64/fpu/s_fdimf.S
deleted file mode 100644
index 356c23c4e3..0000000000
--- a/sysdeps/sparc/sparc64/fpu/s_fdimf.S
+++ /dev/null
@@ -1,31 +0,0 @@
-/* Compute positive difference, sparc 64-bit.
-   Copyright (C) 2013-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by David S. Miller <davem@davemloft.net>.
-
-   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>
-
-ENTRY(__fdimf)
-	fcmps	%f1, %f3
-	fbug	1f
-	 nop
-	fzeros	%f1
-	fnegs	%f1, %f3
-1:	retl
-	 fsubs	%f1, %f3, %f0
-END(__fdimf)
-weak_alias (__fdimf, fdimf)