Remove 32 bit sparc v7 support

The patch is straighforward:

  - The sparc32 v8 implementations are moved as the generic ones.

  - A configure test is added to check for either __sparc_v8__ or
    __sparc_v9__.

  - The triple names are simplified and sparc implies sparcv8.

The idea is to keep support on sparcv8 architectures that does support
CAS instructions, such as LEON3/LEON4.

Checked on a sparcv9-linux-gnu and sparc64-linux-gnu.

Tested-by: Andreas Larsson <andreas@gaisler.com>

1 files changed, 27 insertions, 116 deletions

diff --git a/sysdeps/sparc/sparc32/submul_1.S b/sysdeps/sparc/sparc32/submul_1.S
index 920422adf1..11eef05300 100644
--- a/sysdeps/sparc/sparc32/submul_1.S
+++ b/sysdeps/sparc/sparc32/submul_1.S
@@ -1,146 +1,57 @@
-! SPARC __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
-! the result from a second limb vector.
-!
+! SPARC v8 __mpn_submul_1 -- Multiply a limb vector with a limb and
+! subtract the result from a second limb vector.
+
 ! Copyright (C) 1992-2019 Free Software Foundation, Inc.
-!
+
 ! This file is part of the GNU MP Library.
-!
+
 ! The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB.  If not,
 ! see <https://www.gnu.org/licenses/>.
 
 
 ! INPUT PARAMETERS
-! RES_PTR	o0
-! S1_PTR	o1
-! SIZE		o2
-! S2_LIMB	o3
+! res_ptr	o0
+! s1_ptr	o1
+! size		o2
+! s2_limb	o3
 
 #include <sysdep.h>
 
 ENTRY(__mpn_submul_1)
-	! Make S1_PTR and RES_PTR point at the end of their blocks
-	! and put (- 4 x SIZE) in index/loop counter.
-	sll	%o2,2,%o2
-	add	%o0,%o2,%o4	! RES_PTR in o4 since o0 is retval
-	add	%o1,%o2,%o1
-	sub	%g0,%o2,%o2
-
-	cmp	%o3,0xfff
-	bgu	LOC(large)
-	nop
+	sub	%g0,%o2,%o2		! negate ...
+	sll	%o2,2,%o2		! ... and scale size
+	sub	%o1,%o2,%o1		! o1 is offset s1_ptr
+	sub	%o0,%o2,%g1		! g1 is offset res_ptr
 
-	ld	[%o1+%o2],%o5
-	mov	0,%o0
-	b	LOC(0)
-	 add	%o4,-4,%o4
-LOC(loop0):
-	subcc	%o5,%g1,%g1
-	ld	[%o1+%o2],%o5
-	addx	%o0,%g0,%o0
-	st	%g1,[%o4+%o2]
-LOC(0):	wr	%g0,%o3,%y
-	sra	%o5,31,%g2
-	and	%o3,%g2,%g2
-	andcc	%g1,0,%g1
-	mulscc	%g1,%o5,%g1
- 	mulscc	%g1,%o5,%g1
- 	mulscc	%g1,%o5,%g1
- 	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,%o5,%g1
-	mulscc	%g1,0,%g1
-	sra	%g1,20,%g4
-	sll	%g1,12,%g1
- 	rd	%y,%g3
-	srl	%g3,20,%g3
-	or	%g1,%g3,%g1
+	mov	0,%o0			! clear cy_limb
 
-	addcc	%g1,%o0,%g1
-	addx	%g2,%g4,%o0	! add sign-compensation and cy to hi limb
-	addcc	%o2,4,%o2	! loop counter
-	bne	LOC(loop0)
-	 ld	[%o4+%o2],%o5
-
-	subcc	%o5,%g1,%g1
-	addx	%o0,%g0,%o0
-	retl
-	st	%g1,[%o4+%o2]
-
-
-LOC(large):
-	ld	[%o1+%o2],%o5
-	mov	0,%o0
-	sra	%o3,31,%g4	! g4 = mask of ones iff S2_LIMB < 0
-	b	LOC(1)
-	 add	%o4,-4,%o4
 LOC(loop):
-	subcc	%o5,%g3,%g3
-	ld	[%o1+%o2],%o5
-	addx	%o0,%g0,%o0
-	st	%g3,[%o4+%o2]
-LOC(1):	wr	%g0,%o5,%y
-	and	%o5,%g4,%g2
-	andcc	%g0,%g0,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%o3,%g1
-	mulscc	%g1,%g0,%g1
+	ld	[%o1+%o2],%o4
+	ld	[%g1+%o2],%g2
+	umul	%o4,%o3,%o5
 	rd	%y,%g3
-	addcc	%g3,%o0,%g3
-	addx	%g2,%g1,%o0
+	addcc	%o5,%o0,%o5
+	addx	%g3,0,%o0
+	subcc	%g2,%o5,%g2
+	addx	%o0,0,%o0
+	st	%g2,[%g1+%o2]
+
 	addcc	%o2,4,%o2
 	bne	LOC(loop)
-	 ld	[%o4+%o2],%o5
+	 nop
 
-	subcc	%o5,%g3,%g3
-	addx	%o0,%g0,%o0
 	retl
-	st	%g3,[%o4+%o2]
+	 nop
 
 END(__mpn_submul_1)