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authorCarlos O'Donell <carlos@systemhalted.org>2014-04-29 03:08:48 -0400
committerCarlos O'Donell <carlos@systemhalted.org>2014-04-29 04:20:39 -0400
commit5abebba403181de898bbea4ee1bcce5f088c663b (patch)
tree0c4a8eac85e1f2db87621b524bfcbdeb24c2c8f9 /sysdeps/hppa/udiv_qrnnd.S
parent4e4a58f4ee45cea6f3083af8f12d3834bb999555 (diff)
downloadglibc-5abebba403181de898bbea4ee1bcce5f088c663b.tar.gz
glibc-5abebba403181de898bbea4ee1bcce5f088c663b.tar.xz
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Relocate hppa from ports to libc.
Diffstat (limited to 'sysdeps/hppa/udiv_qrnnd.S')
-rw-r--r--sysdeps/hppa/udiv_qrnnd.S285


1 files changed, 285 insertions, 0 deletions
diff --git a/sysdeps/hppa/udiv_qrnnd.S b/sysdeps/hppa/udiv_qrnnd.S
new file mode 100644
index 0000000000..cf06286b02
--- /dev/null
+++ b/sysdeps/hppa/udiv_qrnnd.S
@@ -0,0 +1,285 @@
+;! HP-PA  __udiv_qrnnd division support, used from longlong.h.
+;! This version runs fast on pre-PA7000 CPUs.
+
+;! Copyright (C) 1993-2014 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.  If not, see
+;! <http://www.gnu.org/licenses/>.
+
+
+;! INPUT PARAMETERS
+;! rem_ptr	gr26
+;! n1		gr25
+;! n0		gr24
+;! d		gr23
+
+;! The code size is a bit excessive.  We could merge the last two ds;addc
+;! sequences by simply moving the "bb,< Odd" instruction down.  The only
+;! trouble is the FFFFFFFF code that would need some hacking.
+
+	.text
+	.export		__udiv_qrnnd
+__udiv_qrnnd:
+	.proc
+	.callinfo	frame=0,no_calls
+	.entry
+
+	comb,<		%r23,%r0,L$largedivisor
+	 sub		%r0,%r23,%r1		;! clear cy as side-effect
+	ds		%r0,%r1,%r0
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r23,%r25
+	addc		%r24,%r24,%r28
+	ds		%r25,%r23,%r25
+	comclr,>=	%r25,%r0,%r0
+	addl		%r25,%r23,%r25
+	stws		%r25,0(%r26)
+	bv		0(%r2)
+	 addc		%r28,%r28,%r28
+
+L$largedivisor:
+	extru		%r24,31,1,%r20		;! r20 = n0 & 1
+	bb,<		%r23,31,L$odd
+	 extru		%r23,30,31,%r22		;! r22 = d >> 1
+	shd		%r25,%r24,1,%r24	;! r24 = new n0
+	extru		%r25,30,31,%r25		;! r25 = new n1
+	sub		%r0,%r22,%r21
+	ds		%r0,%r21,%r0
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	comclr,>=	%r25,%r0,%r0
+	addl		%r25,%r22,%r25
+	sh1addl		%r25,%r20,%r25
+	stws		%r25,0(%r26)
+	bv		0(%r2)
+	 addc		%r24,%r24,%r28
+
+L$odd:	addib,sv,n	1,%r22,L$FF..		;! r22 = (d / 2 + 1)
+	shd		%r25,%r24,1,%r24	;! r24 = new n0
+	extru		%r25,30,31,%r25		;! r25 = new n1
+	sub		%r0,%r22,%r21
+	ds		%r0,%r21,%r0
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r24
+	ds		%r25,%r22,%r25
+	addc		%r24,%r24,%r28
+	comclr,>=	%r25,%r0,%r0
+	addl		%r25,%r22,%r25
+	sh1addl		%r25,%r20,%r25
+;! We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25
+	add,nuv		%r28,%r25,%r25
+	addl		%r25,%r1,%r25
+	addc		%r0,%r28,%r28
+	sub,<<		%r25,%r23,%r0
+	addl		%r25,%r1,%r25
+	stws		%r25,0(%r26)
+	bv		0(%r2)
+	 addc		%r0,%r28,%r28
+
+;! This is just a special case of the code above.
+;! We come here when d == 0xFFFFFFFF
+L$FF..:	add,uv		%r25,%r24,%r24
+	sub,<<		%r24,%r23,%r0
+	ldo		1(%r24),%r24
+	stws		%r24,0(%r26)
+	bv		0(%r2)
+	 addc		%r0,%r25,%r28
+
+	.exit
+	.procend

 

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