powerpc: round/roundf refactor

This patches consolidates all the powerpc round{f} implementations on
the generic sysdeps/powerpc/fpu/s_round{f}.  The generic implementation
uses either the compiler builts for ISA 2.03+ (which generates the
frim instruction) or a generic implementation which uses FP only
operations.

The IFUNC organization for powerpc64 is also change to be enabled only
for powerpc64 and not for powerpc64le (since minium ISA of 2.08 does not
require the fallback generic implementation).

Checked on powerpc-linux-gnu (built without --with-cpu, with
--with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch),
powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+
and --disable-multi-arch).

	* sysdeps/powerpc/fpu/round_to_integer.h (set_fenv_mode): Add
	ROUND handling.
	(round_mode): Add definition for ROUND.
	(round_to_integer_float): Likewise.
	* sysdeps/powerpc/fpu/s_round.c: New file.
	* sysdeps/powerpc/fpu/s_roundf.c: New file.
	* sysdeps/powerpc/powerpc32/fpu/s_round.S: Remove file.
	* sysdeps/powerpc/powerpc32/fpu/s_roundf.S: Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_round-power5+.S:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_round-ppc32.S:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_roundf-power5+.S:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_roundf-ppc32.S:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_round-power5+.c: New
	file.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_round-ppc32.c:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_roundf-power5+.c:
	Likewise.
	* sysdep/powerpc/powepc32/power4/fpu/multiarch/s_roundf-ppc32.c:
	Likewise.
	* sysdep/powerpc/powerpc32/power5+/fpu/s_round.S: Remove file.
	* sysdep/powerpc/powerpc32/power5+/fpu/s_roundf.S: Likewise.
	* sysdep/powerpc/powerpc64/be/fpu/multiarch/Makefile
	(libm-sysdep_routines): Add s_round-power5+, s_round-ppc64,
	s_roundf-power5+, and s_roundf-ppc64.
	(CFLAGS-s_round-power5+.c, CFLAGS-s_roundf-power5+.c): New rule.
	* sysdep/powerpc/powercp64/be/fpu/multiarch/s_round-power5+.c: New
	file.
	* sysdep/powerpc/powercp64/be/fpu/multiarch/s_round-ppc64.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_round.c: ... here.
	* sysdep/powerpc/powercp64/be/fpu/multiarch/s_roundf-power5+.c: New
	file.
	* sysdep/powerpc/powercp64/be/fpu/multiarch/s_roundf-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_roundf.c: ... here.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
	(libm-sysdep_routines): Remove s_round-power5+, s_round-ppc64,
	s_roundf-power5+, and s_roundf-ppc64.
	* sysdep/powerpc/powerpc64/fpu/multiarch/s_round-power5+.S: Remove
	file.
	* sysdep/powerpc/powerpc64/fpu/multiarch/s_round-ppc64.S: Likewise.
	* sysdep/powerpc/powerpc64/fpu/multiarch/s_roundf-power5+.S:
	Likewise.
	* sysdep/powerpc/powerpc64/fpu/multiarch/s_roundf-ppc64.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_round.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_roundf.S: Likewise.
	* sysdep/powerpc/powerpc64/power5+/fpu/s_round.S: Likewise.
	* sysdep/powerpc/powerpc64/power5+/fpu/s_roundf.S: Likewise.

Reviewed-by: Gabriel F. T. Gomes <gabriel@inconstante.eti.br>

9 files changed, 1 insertions, 340 deletions

diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
index 8a73108e4c..11c39f4b35 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
@@ -15,8 +15,7 @@ sysdep_calls := s_copysign-power6 s_copysign-ppc64 \
 sysdep_routines += $(sysdep_calls)
 libm-sysdep_routines += s_llround-power6x \
 			s_llround-power5+ s_llround-ppc64 \
-			s_round-power5+ s_round-ppc64 \
-			s_roundf-power5+ s_roundf-ppc64 s_trunc-power5+ \
+			s_trunc-power5+ \
 			s_trunc-ppc64 s_truncf-power5+ s_truncf-ppc64 \
 			s_llrint-power6x s_llrint-ppc64 \
 			s_logb-power7 s_logbf-power7 \
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-power5+.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-power5+.S
deleted file mode 100644
index 8c38759d3f..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-power5+.S
+++ /dev/null
@@ -1,30 +0,0 @@
-/* round function.  PowerPC64/power5+ version.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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 <shlib-compat.h>
-
-#undef weak_alias
-#define weak_alias(a,b)
-#undef strong_alias
-#define strong_alias(a,b)
-#undef compat_symbol
-#define compat_symbol(a,b,c,d)
-
-#define __round __round_power5plus
-
-#include <sysdeps/powerpc/powerpc64/power5+/fpu/s_round.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-ppc64.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-ppc64.S
deleted file mode 100644
index 5ea616d429..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round-ppc64.S
+++ /dev/null
@@ -1,30 +0,0 @@
-/* round function.  PowerPC64 default version.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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 <shlib-compat.h>
-
-#undef weak_alias
-#define weak_alias(a,b)
-#undef strong_alias
-#define strong_alias(a,b)
-#undef compat_symbol
-#define compat_symbol(a,b,c,d)
-
-#define __round __round_ppc64
-
-#include <sysdeps/powerpc/powerpc64/fpu/s_round.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c
deleted file mode 100644
index eb66a8d528..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Multiple versions of round.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#define NO_MATH_REDIRECT
-#include <math.h>
-#include <math_ldbl_opt.h>
-#include <shlib-compat.h>
-#include "init-arch.h"
-#include <libm-alias-double.h>
-
-extern __typeof (__round) __round_ppc64 attribute_hidden;
-extern __typeof (__round) __round_power5plus attribute_hidden;
-
-libc_ifunc (__round,
-	    (hwcap & PPC_FEATURE_POWER5_PLUS)
-	    ? __round_power5plus
-            : __round_ppc64);
-
-libm_alias_double (__round, round)
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-power5+.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-power5+.S
deleted file mode 100644
index c29c31785e..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-power5+.S
+++ /dev/null
@@ -1,24 +0,0 @@
-/* roundf function.  PowerPC64/power5+ version.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#undef weak_alias
-#define weak_alias(a,b)
-
-#define __roundf __roundf_power5plus
-
-#include <sysdeps/powerpc/powerpc64/power5+/fpu/s_roundf.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-ppc64.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-ppc64.S
deleted file mode 100644
index ced4241b2b..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf-ppc64.S
+++ /dev/null
@@ -1,24 +0,0 @@
-/* roundf function.  PowerPC64 default version.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#undef weak_alias
-#define weak_alias(a,b)
-
-#define __roundf __roundf_ppc64
-
-#include <sysdeps/powerpc/powerpc64/fpu/s_roundf.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c
deleted file mode 100644
index 640bca5a7a..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Multiple versions of roundf.
-   Copyright (C) 2013-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#define NO_MATH_REDIRECT
-#include <math.h>
-#include <math_ldbl_opt.h>
-#include <shlib-compat.h>
-#include "init-arch.h"
-#include <libm-alias-float.h>
-
-extern __typeof (__roundf) __roundf_ppc64 attribute_hidden;
-extern __typeof (__roundf) __roundf_power5plus attribute_hidden;
-
-libc_ifunc (__roundf,
-	    (hwcap & PPC_FEATURE_POWER5_PLUS)
-	    ? __roundf_power5plus
-            : __roundf_ppc64);
-
-libm_alias_float (__round, round)
diff --git a/sysdeps/powerpc/powerpc64/fpu/s_round.S b/sysdeps/powerpc/powerpc64/fpu/s_round.S
deleted file mode 100644
index 0b06a52d09..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/s_round.S
+++ /dev/null
@@ -1,80 +0,0 @@
-/* round function.  PowerPC64 version.
-   Copyright (C) 2004-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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>
-#include <libm-alias-double.h>
-
-	.section	".toc","aw"
-.LC0:	/* 2**52 */
-	.tc FD_43300000_0[TC],0x4330000000000000
-.LC1:	/* 0.5 */
-	.tc FD_3fe00000_0[TC],0x3fe0000000000000
-	.section	".text"
-
-/* double [fp1] round (double x [fp1])
-   IEEE 1003.1 round function.  IEEE specifies "round to the nearest
-   integer value, rounding halfway cases away from zero, regardless of
-   the current rounding mode."  However PowerPC Architecture defines
-   "Round to Nearest" as "Choose the best approximation. In case of a
-   tie, choose the one that is even (least significant bit o).".
-   So we can't use the PowerPC "Round to Nearest" mode. Instead we set
-   "Round toward Zero" mode and round by adding +-0.5 before rounding
-   to the integer value.  */
-
-ENTRY (__round, 4)
-	CALL_MCOUNT 0
-	lfd	fp13,.LC0@toc(2)
-	fabs	fp0,fp1
-	fsub	fp12,fp13,fp13	/* generate 0.0  */
-	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO52)  */
-	mffs	fp11		/* Save current FPU rounding mode and
-				   "inexact" state.  */
-	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnl-	cr7,.L10
-	mtfsfi	7,1		/* Set rounding mode toward 0.  */
-	lfd	fp10,.LC1@toc(2)
-	ble-	cr6,.L4
-	fadd	fp1,fp1,fp10	/* x+= 0.5;  */
-	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
-	fsub	fp1,fp1,fp13	/* x-= TWO52;  */
-	fabs	fp1,fp1		/* if (x == 0.0)  */
-				/* x = 0.0; */
-	mtfsf	0xff,fp11	/* Restore previous rounding mode and
-				   "inexact" state.  */
-	blr
-.L4:
-	fsub	fp9,fp1,fp10	/* x+= 0.5;  */
-	bge-	cr6,.L9		/* if (x < 0.0)  */
-	fsub	fp1,fp9,fp13	/* x-= TWO52;  */
-	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
-	fnabs	fp1,fp1		/* if (x == 0.0)  */
-				/* x = -0.0; */
-.L9:
-	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)
-
-libm_alias_double (__round, round)
diff --git a/sysdeps/powerpc/powerpc64/fpu/s_roundf.S b/sysdeps/powerpc/powerpc64/fpu/s_roundf.S
deleted file mode 100644
index a9c32c5774..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/s_roundf.S
+++ /dev/null
@@ -1,82 +0,0 @@
-/* roundf  function.  PowerPC64 version.
-   Copyright (C) 2004-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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 <libm-alias-float.h>
-
-	.section	".toc","aw"
-	.p2align 3
-.LC0:	/* 2**23 */
-	.long 0x4b000000
-.LC1:	/* 0.5 */
-	.long 0x3f000000
-
-	.section	".text"
-
-/* float [fp1] roundf  (float x [fp1])
-   IEEE 1003.1 round function.  IEEE specifies "round to the nearest
-   integer value, rounding halfway cases away from zero, regardless of
-   the current rounding mode."  However PowerPC Architecture defines
-   "Round to Nearest" as "Choose the best approximation. In case of a
-   tie, choose the one that is even (least significant bit o).".
-   So we can't use the PowerPC "Round to Nearest" mode. Instead we set
-   "Round toward Zero" mode and round by adding +-0.5 before rounding
-   to the integer value.  */
-
-ENTRY (__roundf, 4)
-	CALL_MCOUNT 0
-	lfs	fp13,.LC0@toc(2)
-	fabs	fp0,fp1
-	fsubs	fp12,fp13,fp13	/* generate 0.0  */
-	fcmpu	cr7,fp0,fp13	/* if (fabs(x) > TWO23)  */
-	mffs	fp11		/* Save current FPU rounding mode and
-				   "inexact" state.  */
-	fcmpu	cr6,fp1,fp12	/* if (x > 0.0)  */
-	bnl-	cr7,.L10
-	mtfsfi	7,1		/* Set rounding mode toward 0.  */
-	lfs	fp10,.LC1@toc(2)
-	ble-	cr6,.L4
-	fadds	fp1,fp1,fp10	/* x+= 0.5;  */
-	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
-	fsubs	fp1,fp1,fp13	/* x-= TWO23;  */
-	fabs	fp1,fp1		/* if (x == 0.0)  */
-				/* x = 0.0; */
-	mtfsf	0xff,fp11	/* Restore previous rounding mode and
-				   "inexact" state.  */
-	blr
-.L4:
-	fsubs	fp9,fp1,fp10	/* x+= 0.5;  */
-	bge-	cr6,.L9		/* if (x < 0.0)  */
-	fsubs	fp1,fp9,fp13	/* x-= TWO23;  */
-	fadds	fp1,fp1,fp13	/* x+= TWO23;  */
-	fnabs	fp1,fp1		/* if (x == 0.0)  */
-				/* x = -0.0; */
-.L9:
-	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)
-
-libm_alias_float (__round, round)
-