| /* Copyright (C) 2008-2021 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 */ |
| FUNC(__fixdfsi) |
| .global __fixdfsi |
| .balign 4 |
| __fixdfsi: |
| push_s blink |
| push_s r0 |
| bl.d __fixdfsi_c |
| push_s r1 |
| mov_s r2,r0 |
| pop_s r1 |
| ld r0,[sp] |
| bl.d __fixdfsi_asm |
| st r2,[sp] |
| pop_s r1 |
| pop_s blink |
| cmp r0,r1 |
| jeq_s [blink] |
| bl abort |
| ENDFUNC(__fixdfsi) |
| #define __fixdfsi __fixdfsi_asm |
| #endif /* DEBUG */ |
| |
| /* If the fraction has to be shifted left by a positive non-zero amount, |
| we have to combine bits from DBL0L and DBL0H. If we shift right, |
| or shift by zero, we only want to have the bits from DBL0H in r0. */ |
| |
| .global __fixdfsi |
| FUNC(__fixdfsi) |
| .balign 4 |
| __fixdfsi: |
| bbit0 DBL0H,30,.Lret0or1 |
| asr r2,DBL0H,20 |
| bmsk_s DBL0H,DBL0H,19 |
| sub_s r2,r2,19; 0x3ff+20-0x400 |
| neg_s r3,r2 |
| asr.f 0,r3,11 |
| bset_s DBL0H,DBL0H,20 |
| #ifdef __LITTLE_ENDIAN__ |
| mov.cs DBL0L,DBL0H |
| asl DBL0H,DBL0H,r2 |
| #else |
| asl.cc DBL0H,DBL0H,r2 |
| lsr.cs DBL0H,DBL0H,r3 |
| #endif |
| lsr_s DBL0L,DBL0L,r3 |
| |
| add.cc r0,r0,r1 |
| j_s.d [blink] |
| neg.pl r0,r0 |
| .Lret0or1: |
| add.f r0,DBL0H,0x100000 |
| lsr_s r0,r0,30 |
| |
| bmsk_s r0,r0,0 |
| j_s.d [blink] |
| neg.mi r0,r0 |
| ENDFUNC(__fixdfsi) |
