powerpc: Refactor powerpc64 lround/lroundf/llround/llroundf

This patches consolidates all the powerpc {l}lround{f} implementations
on the generic sysdeps/powerpc/fpu/s_{l}lround{f}.c.

The IFUNC support is also moved only to powerpc64 only, since for
powerpc64le generic implementation resulting in optimized code.

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/powerpc64/be/fpu/multiarch/Makefile
	(libm-sysdep_routines): Add s_llround-power8, s_llround-power6x,
	s_llround-power5+, s_llround-ppc64, and s_llroundf-ppc64.
	(CFLAGS-s_llround-power8.c, CFLAGS-s_llround-power6x.c,
	CFLAGS-s_llround-power5+.c): New rule.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llround-power5+.c:
	New file.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llround-power6x.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llround-power8.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llround-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llroundf-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llround.c: ... here.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_llroundf.c: ... here.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_lround.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_lround.c: ... here.
	* sysdeps/powerpc/powerpc64/fpu/Makefile
	[$(subdir) == math] (CFLAGS-s_llround.c): New rule.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
	(libm-sysdep_routines): Remove s_llround-* objects.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround-power5+.S: Remove
	file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround-power6x.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround-power8.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround-ppc64.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf-ppc64.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_llroundf.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_lround.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_lroundf.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_llround.c: New file.
	* sysdeps/powerpc/powerpc64/fpu/s_llroundf.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_lround.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_lroundf.c: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_llroundf.S: Likewise.
	* sysdeps/powerpc/powerpc64/power6x/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc64/power6x/fpu/s_llroundf.S: Likewise.
	* sysdeps/powerpc/powerpc64/power8/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc64/power8/fpu/s_llroundf.S: Likewise.

Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>

1 files changed, 0 insertions, 89 deletions

diff --git a/sysdeps/powerpc/powerpc64/fpu/s_llroundf.S b/sysdeps/powerpc/powerpc64/fpu/s_llroundf.S
deleted file mode 100644
index b8afebc7dc..0000000000
--- a/sysdeps/powerpc/powerpc64/fpu/s_llroundf.S
+++ /dev/null
@@ -1,89 +0,0 @@
-/* llroundf 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"
-.LC0:	/* 2^23 */
-	.tc FD_41600000_0[TC],0x4160000000000000
-.LC1:	/* 0.5 */
-	.tc FD_3fe00000_0[TC],0x3fe0000000000000
-.LC2:	/* 2^52 */
-	.tc FD_43300000_0[TC],0x4330000000000000
-	.section	".text"
-
-/* long long [r3] llroundf (float x [fp1])
-   IEEE 1003.1 llroundf function.  IEEE specifies "roundf to the nearest
-   integer value, rounding halfway cases away from zero, regardless of
-   the current rounding mode."  However PowerPC Architecture defines
-   "roundf 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.
-
-   It is necessary to detect when x is (+-)0x1.fffffffffffffp-2
-   because adding +-0.5 in this case will cause an erroneous shift,
-   carry and round.  We simply return 0 if 0.5 > x > -0.5.  Likewise
-   if x is and odd number between +-(2^23 and 2^24-1) a shift and
-   carry will erroneously round if biased with +-0.5.  Therefore if x
-   is greater/less than +-2^23 we don't need to bias the number with
-   +-0.5.  */
-
-ENTRY (__llroundf)
-	CALL_MCOUNT 0
-	lfd	fp9,.LC0@toc(2)	/* Load 2^23 into fpr9.  */
-	lfd	fp10,.LC1@toc(2)/* Load 0.5 into fpr10.  */
-	lfd	fp11,.LC2@toc(2)	/* Load 2^52 into fpr11.  */
-	fabs	fp2,fp1		/* Get the absolute value of x.  */
-	fsub	fp12,fp10,fp10	/* Compute 0.0 into fp12.  */
-	fcmpu	cr6,fp2,fp10	/* if |x| < 0.5  */
-	fcmpu	cr7,fp2,fp9	/* if |x| >= 2^23  */
-	fcmpu	cr1,fp1,fp12	/* x is negative? x < 0.0  */
-	blt-	cr6,.Lretzero	/* 0.5 > x < -0.5 so just return 0.  */
-	bge-	cr7,.Lnobias	/* 2^23 > x < -2^23 just convert with no bias.  */
-	/* Test whether an integer to avoid spurious "inexact".  */
-	fadd	fp3,fp2,fp11
-	fsub	fp3,fp3,fp11
-	fcmpu	cr5,fp2,fp3
-	beq	cr5,.Lnobias
-	fadd	fp3,fp2,fp10	/* |x|+=0.5 bias to prepare to round.  */
-	bge	cr1,.Lconvert	/* x is positive so don't negate x.  */
-	fnabs	fp3,fp3		/* -(|x|+=0.5)  */
-.Lconvert:
-	fctidz	fp4,fp3		/* Convert to Integer double word round toward 0.  */
-	stfd	fp4,-16(r1)
-	nop
-	nop
-	nop
-	ld	r3,-16(r1)	/* Load return as integer.  */
-.Lout:
-	blr
-.Lretzero:			/* 0.5 > x > -0.5  */
-	li	r3,0		/* return 0.  */
-	b	.Lout
-.Lnobias:
-	fmr	fp3,fp1
-	b	.Lconvert
-	END (__llroundf)
-
-strong_alias (__llroundf, __lroundf)
-libm_alias_float (__llround, llround)
-libm_alias_float (__lround, lround)
-