libgcc/config/arc/ieee-754/extendsfdf2.S

/* Copyright (C) 2006-2026 Free Software Foundation, Inc.
   Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
		on behalf of Synopsys Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC 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 General Public License
for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#include "arc-ieee-754.h"

#if 0 /* DEBUG */
	.global __extendsfdf2
	.balign 4
	FUNC(__extendsfdf2)
__extendsfdf2:
	push_s blink
	bl.d __extendsfdf2_c
	push_s r0
	ld_s r2,[sp]
	st_s r1,[sp]
	push_s r0
	bl.d __extendsfdf2_asm
	mov_s r0,r2
	pop_s r2
	pop_s r3
	pop_s blink
	cmp r0,r2
	cmp.eq r1,r3
	jeq_s [blink]
	bl abort
	ENDFUNC(__extendsfdf2)
#define __extendsfdf2 __extendsfdf2_asm
#endif /* DEBUG */
#if 0 /* ARC600 */
__extendsfdf2:
	lsr r2,r0,23
	tst r2,0xff
	bic.ne.f r2,0xff
	beq_s .Linf_nan_denorm_0
..
.Linf_nan_denorm:
	bbit1 r0,30,.Linf_nan
#endif
	.global __extendsfdf2
	.balign 4
	FUNC(__extendsfdf2)
__extendsfdf2:
	add.f r1,r0,r0
	norm r3,r1
#ifdef __LITTLE_ENDIAN__
	lsr_s DBL0H,r1,4
	brhs r3,7,.Linf_nan_denorm_0
	asl_s DBL0L,r0,29
	add_s DBL0H,DBL0H, \
		0x38000000
#else
	lsr r2,r1,4
	brhs r3,7,.Linf_nan_denorm_0
	asl_s DBL0L,r1,28
	add DBL0H,r2, \
		0x38000000
#endif
	j_s.d [blink]
	bxor.cs DBL0H,DBL0H,31
	.balign 4
.Linf_nan_denorm_0:
#ifdef __LITTLE_ENDIAN__
	mov_s DBL0H,r0
	jeq.d [blink]
	mov.eq DBL0L,0
#else
	jeq_s [blink]
#endif
	bmi .Linf_nan
	asl_s r0,r0,r3
	rsub r3,r3,0x380+6
#ifdef __LITTLE_ENDIAN__
	asl_s r3,r3,20
	lsr DBL0H,r0,9
	asl_s DBL0L,r0,23
	add_s DBL0H,DBL0H,r3
	j_s.d [blink]
	bxor.cs DBL0H,DBL0H,31
#else
	asl DBL0L,r0,23
	lsr_s DBL0H,r0,9
	asl_s r3,r3,20
	bxor.cs DBL0H,DBL0H,31
	j_s.d [blink]
	add_l DBL0H,DBL0H,r3
#endif
.Linf_nan:
#ifdef __LITTLE_ENDIAN__
	lsr DBL0H,r0,3

	or_s DBL0H,DBL0H,r0
	j_s.d [blink]
	mov_l DBL0L,0
#else
	lsr r3,r0,3
	mov_s DBL0L,0
	j_s.d [blink]
	or_l DBL0H,r0,r3
#endif
	ENDFUNC(__extendsfdf2)