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/* Unsigned 32 bit division optimized for Epiphany.

   Copyright (C) 2009, 2011 Free Software Foundation, Inc.

   Contributed by Embecosm on behalf of Adapteva, Inc.

This file is part of GCC.

This file 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.

This file 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

.  */

#include "epiphany-asm.h"

        FSTAB (__modsi3,T_UINT)

        .global SYM(__modsi3)

        .balign 4

        HIDDEN_FUNC(__modsi3)

SYM(__modsi3):

        asr TMP3,r0,31 ; save sign

         float TMP0,r0

        float TMP1,r1

         mov r2,0

        sub TMP4,r2,r0

        beq .Lret_r0

        movgt r0,TMP4

        sub TMP2,r2,r1

        movlte TMP2,r1

        sub r2,TMP0,TMP1

        lsl r2,r2,1

        blte .L0step

        asr TMP4,r2,24

        lsl r2,TMP4,3

        mov TMP4,%low(.L0step)

        movt TMP4,%high(.L0step)

        sub r2,TMP4,r2

        jr r2

#define STEP(n) lsl.l r2,TMP2,n` sub r2,r0,r2` movgteu r0,r2

        .balign 8,,2

        STEP(31)` STEP(30)` STEP(29)` STEP(28)`

        STEP(27)` STEP(26)` STEP(25)` STEP(24)`

        STEP(23)` STEP(22)` STEP(21)` STEP(20)`

        STEP(19)` STEP(18)` STEP(17)` STEP(16)`

        STEP(15)` STEP(14)` STEP(13)` STEP(12)`

        STEP(11)` STEP(10)` STEP(9)`  STEP(8)`

        STEP(7)` STEP(6)` STEP(5)` STEP(4)` STEP(3)` STEP(2)` STEP(1)

.L0step:STEP(0)

        eor r0,r0,TMP3 ; restore sign

        sub r0,r0,TMP3

.Lret_r0:

        rts

        ENDFUNC(__modsi3)