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authorRoland McGrath <roland@gnu.org>2008-11-26 07:26:32 +0000
committerRoland McGrath <roland@gnu.org>2008-11-26 07:26:32 +0000
commitc0439b95b88bccacb5562e372f881beb23376a72 (patch)
treeaea008f060bef693d43f285f5adb5ece05cb7db6 /sysdeps/alpha/ldiv.S
parentf1092afe15ad779d61a1420c05854a9122d3ce5e (diff)
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Moved alpha to ports repository.
2008-11-25  Roland McGrath  <roland@redhat.com>

	* sysdeps/alpha, sysdeps/unix/bsd/osf/alpha,
	sysdeps/unix/bsd/Attic/osf1/alpha, sysdeps/unix/sysv/linux/alpha,
	sysdeps/unix/sysv/linux/alpha/alpha, sysdeps/unix/alpha,
	sysdeps/mach/alpha, sysdeps/mach/hurd/alpha:
	Subdirectories moved to ports repository.
	* configure.in (base_machine): Remove alpha case.
Diffstat (limited to 'sysdeps/alpha/ldiv.S')
-rw-r--r--sysdeps/alpha/ldiv.S218
1 files changed, 0 insertions, 218 deletions
diff --git a/sysdeps/alpha/ldiv.S b/sysdeps/alpha/ldiv.S
deleted file mode 100644
index 0a971a7ed0..0000000000
--- a/sysdeps/alpha/ldiv.S
+++ /dev/null
@@ -1,218 +0,0 @@
-/* Copyright (C) 1996, 1997, 2001, 2004 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Richard Henderson <rth@tamu.edu>.
-
-   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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include "div_libc.h"
-
-#undef FRAME
-#ifdef __alpha_fix__
-#define FRAME 0
-#else
-#define FRAME 16
-#endif
-
-#undef X
-#undef Y
-#define X $17
-#define Y $18
-
-	.set noat
-
-	.align 4
-	.globl ldiv
-	.ent ldiv
-ldiv:
-	.frame sp, FRAME, ra
-#if FRAME > 0
-	lda	sp, -FRAME(sp)
-#endif
-#ifdef PROF
-	.set	macro
-	ldgp	gp, 0(pv)
-	lda	AT, _mcount
-	jsr	AT, (AT), _mcount
-	.set	nomacro
-	.prologue 1
-#else
-	.prologue 0
-#endif
-
-	beq	Y, $divbyzero
-	excb
-	mf_fpcr	$f10
-
-	_ITOFT2	X, $f0, 0, Y, $f1, 8
-
-	.align	4
-	cvtqt	$f0, $f0
-	cvtqt	$f1, $f1
-	divt/c	$f0, $f1, $f0
-	unop
-
-	/* Check to see if X fit in the double as an exact value.  */
-	sll	X, (64-53), AT
-	sra	AT, (64-53), AT
-	cmpeq	X, AT, AT
-	beq	AT, $x_big
-
-	/* If we get here, we're expecting exact results from the division.
-	   Do nothing else besides convert and clean up.  */
-	cvttq/c	$f0, $f0
-	excb
-	mt_fpcr	$f10
-	_FTOIT	$f0, $0, 0
-
-$egress:
-	mulq	$0, Y, $1
-	subq	X, $1, $1
-
-	stq	$0, 0($16)
-	stq	$1, 8($16)
-	mov	$16, $0
-
-#if FRAME > 0
-	lda	sp, FRAME(sp)
-#endif
-	ret
-
-	.align	4
-$x_big:
-	/* If we get here, X is large enough that we don't expect exact
-	   results, and neither X nor Y got mis-translated for the fp
-	   division.  Our task is to take the fp result, figure out how
-	   far it's off from the correct result and compute a fixup.  */
-
-#define Q	v0		/* quotient */
-#define R	t0		/* remainder */
-#define SY	t1		/* scaled Y */
-#define S	t2		/* scalar */
-#define QY	t3		/* Q*Y */
-
-	/* The fixup code below can only handle unsigned values.  */
-	or	X, Y, AT
-	mov	$31, t5
-	blt	AT, $fix_sign_in
-$fix_sign_in_ret1:
-	cvttq/c	$f0, $f0
-
-	_FTOIT	$f0, Q, 8
-$fix_sign_in_ret2:
-	mulq	Q, Y, QY
-	excb
-	mt_fpcr	$f10
-
-	.align	4
-	subq	QY, X, R
-	mov	Y, SY
-	mov	1, S
-	bgt	R, $q_high
-
-$q_high_ret:
-	subq	X, QY, R
-	mov	Y, SY
-	mov	1, S
-	bgt	R, $q_low
-
-$q_low_ret:
-	negq	Q, t4
-	cmovlbs	t5, t4, Q
-	br	$egress
-
-	.align	4
-	/* The quotient that we computed was too large.  We need to reduce
-	   it by S such that Y*S >= R.  Obviously the closer we get to the
-	   correct value the better, but overshooting high is ok, as we'll
-	   fix that up later.  */
-0:
-	addq	SY, SY, SY
-	addq	S, S, S
-$q_high:
-	cmpult	SY, R, AT
-	bne	AT, 0b
-
-	subq	Q, S, Q
-	unop
-	subq	QY, SY, QY
-	br	$q_high_ret
-
-	.align	4
-	/* The quotient that we computed was too small.  Divide Y by the 
-	   current remainder (R) and add that to the existing quotient (Q).
-	   The expectation, of course, is that R is much smaller than X.  */
-	/* Begin with a shift-up loop.  Compute S such that Y*S >= R.  We
-	   already have a copy of Y in SY and the value 1 in S.  */
-0:
-	addq	SY, SY, SY
-	addq	S, S, S
-$q_low:
-	cmpult	SY, R, AT
-	bne	AT, 0b
-
-	/* Shift-down and subtract loop.  Each iteration compares our scaled
-	   Y (SY) with the remainder (R); if SY <= R then X is divisible by
-	   Y's scalar (S) so add it to the quotient (Q).  */
-2:	addq	Q, S, t3
-	srl	S, 1, S
-	cmpule	SY, R, AT
-	subq	R, SY, t4
-
-	cmovne	AT, t3, Q
-	cmovne	AT, t4, R
-	srl	SY, 1, SY
-	bne	S, 2b
-
-	br	$q_low_ret
-
-	.align	4
-$fix_sign_in:
-	/* If we got here, then X|Y is negative.  Need to adjust everything
-	   such that we're doing unsigned division in the fixup loop.  */
-	/* T5 is true if result should be negative.  */
-	xor	X, Y, AT
-	cmplt	AT, 0, t5
-	cmplt	X, 0, AT
-	negq	X, t0
-
-	cmovne	AT, t0, X
-	cmplt	Y, 0, AT
-	negq	Y, t0
-
-	cmovne	AT, t0, Y
-	blbc	t5, $fix_sign_in_ret1
-
-	cvttq/c	$f0, $f0
-	_FTOIT	$f0, Q, 8
-	.align	3
-	negq	Q, Q
-	br	$fix_sign_in_ret2
-
-$divbyzero:
-	mov	a0, v0
-	lda	a0, GEN_INTDIV
-	call_pal PAL_gentrap
-	stq	zero, 0(v0)
-	stq	zero, 8(v0)
-
-#if FRAME > 0
-	lda	sp, FRAME(sp)
-#endif
-	ret
-
-	.end	ldiv
-
-weak_alias (ldiv, lldiv)