/*-
 * Copyright (c) 2016 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <mips/asm.h>

RCSID("$NetBSD: fpsf.S,v 1.1 2016/07/14 01:59:18 matt Exp $")

/*
 * This file provides softfloat compatible routines which use FP instructions
 * to do the actual work.  This should give near hard-float performance while
 * being compatible with soft-float code.
 *
 * This file implements the single precision floating point routines.
 */

#ifdef MIPS3
#define COP1_SYNC       nop
#else
#define COP1_SYNC
#endif

LEAF_NOPROFILE(__addsf3)
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        add.s           $f0, $f12, $f14
        mfc1            v0, $f0
        jr              ra
END(__addsf3)

LEAF_NOPROFILE(__subsf3)
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        sub.s           $f0, $f12, $f14
        mfc1            v0, $f0
        jr              ra
END(__subsf3)

LEAF_NOPROFILE(__mulsf3)
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        mul.s           $f0, $f12, $f14
        mfc1            v0, $f0
        jr              ra
END(__mulsf3)

LEAF_NOPROFILE(__divsf3)
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        div.s           $f0, $f12, $f14
        mfc1            v0, $f0
        jr              ra
END(__divsf3)

LEAF_NOPROFILE(__negsf2)
        mtc1            a0, $f12
        COP1_SYNC
        neg.s           $f0, $f12
        mfc1            v0, $f0
        jr              ra
END(__negsf2)

LEAF_NOPROFILE(__truncdfsf2)
        dmtc1           a0, $f12
        COP1_SYNC
        cvt.s.d         $f0, $f12
        mfc1            v0, $f0
        jr              ra
END(__truncdfsf2)

LEAF_NOPROFILE(__fixsfdi)
        mtc1            a0, $f12
        COP1_SYNC
        trunc.l.s       $f0, $f12
        dmfc1           v0, $f0
        jr              ra
END(__fixsfdi)

LEAF_NOPROFILE(__fixsfsi)
        mtc1            a0, $f12
        COP1_SYNC
        trunc.w.s       $f0, $f12
        mfc1            v0, $f0
        jr              ra
END(__fixsfsi)

LEAF_NOPROFILE(__fixunssfdi)
        lui             t0, 0x5f00      # 9223372036854775808.0
        mtc1            t0, $f0
        mtc1            a0, $f12
        COP1_SYNC
        sub.s           $f0, $f12, $f0  # convert to signed 
        trunc.l.s       $f0, $f0
        dmfc1           v0, $f0
        li              v1, 1
        dsll            v1, v1, 63
        add             v0, v0, v1      # convert to unsigned
        jr              ra
END(__fixunssfdi)

LEAF_NOPROFILE(__fixunssfsi)
        lui             t0, 0x4f00      # 2147483648.0
        mtc1            t0, $f0
        mtc1            a0, $f12
        COP1_SYNC
        sub.s           $f0, $f12, $f0  # convert to signed 
        trunc.w.s       $f0, $f0
        mfc1            v0, $f0
        lui             v1, 0x8000      # 0xffffffff80000000
        add             v0, v0, v1      # convert to unsigned
        jr              ra
END(__fixunssfsi)

LEAF_NOPROFILE(__floatdisf)
        dmtc1           a0, $f12
        COP1_SYNC
        cvt.s.l         $f0, $f12
        mfc1            v0, $f0
        jr              ra
END(__floatdisf)

LEAF_NOPROFILE(__floatsisf)
        mtc1            a0, $f12
        COP1_SYNC
        cvt.s.w         $f0, $f12
        mfc1            v0, $f0
        jr              ra
END(__floatsisf)

LEAF_NOPROFILE(__floatundisf)
        li              t0, 1
        dsll            t0, t0, 63      # 9223372036854775808.0
        dsub            a0, a0, t0      # convert to signed
        dmtc1           a0, $f12
        dmtc1           t0, $f14
        COP1_SYNC
        cvt.s.l         $f0, $f12
        cvt.s.l         $f2, $f14
        add.s           $f0, $f0, $f2   # convert back to unsigned
        mfc1            v0, $f0 
        jr              ra
END(__floatundisf)

LEAF_NOPROFILE(__floatunsisf)
        sll             a0, a0, 0       # sign extend to 64 bits
        dmtc1           a0, $f12
        COP1_SYNC
        cvt.s.l         $f0, $f12
        mfc1            v0, $f0 
        jr              ra
END(__floatunsisf)

STRONG_ALIAS(__eqsf2, __nedf2)
LEAF_NOPROFILE(__nesf2)
        .set push
        .set noreorder
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        c.eq.s          $f12, $f14
        bc1f            2f
         li             v0, 1
        move            v0, zero
2:      jr              ra
         nop
        .set pop
END(__nesf2)

STRONG_ALIAS(__gesf2, __ltdf2)
LEAF_NOPROFILE(__ltsf2)
        .set push
        .set noreorder
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        c.olt.s         $f12, $f14
        bc1t            2f
         li             v0, -1
        move            v0, zero
2:      jr              ra
         nop
        .set pop
END(__ltsf2)

STRONG_ALIAS(__gtsf2, __ledf2)
LEAF_NOPROFILE(__lesf2)
        .set push
        .set noreorder
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        c.ole.s         $f12, $f14
        bc1f            2f
         li             v0, 1
        move            v0, zero
2:      jr              ra
         nop
        .set pop
END(__lesf2)

LEAF_NOPROFILE(__unordsf2)
        .set push
        .set noreorder
        mtc1            a0, $f12
        mtc1            a1, $f14
        COP1_SYNC
        c.un.s          $f12, $f14
        bc1t            2f
         li             v0, 1
        move            v0, zero
2:      jr              ra
         nop
        .set pop
END(__unordsf2)