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Annotation of OpenXM_contrib/gmp/mpn/pa64/umul_ppmm.asm, Revision 1.1

1.1     ! ohara       1: dnl  Copyright 1999, 2000, 2002 Free Software Foundation, Inc.
        !             2:
        !             3: dnl  This file is part of the GNU MP Library.
        !             4:
        !             5: dnl  The GNU MP Library is free software; you can redistribute it and/or modify
        !             6: dnl  it under the terms of the GNU Lesser General Public License as published by
        !             7: dnl  the Free Software Foundation; either version 2.1 of the License, or (at your
        !             8: dnl  option) any later version.
        !             9:
        !            10: dnl  The GNU MP Library is distributed in the hope that it will be useful, but
        !            11: dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            12: dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            13: dnl  License for more details.
        !            14:
        !            15: dnl  You should have received a copy of the GNU Lesser General Public License
        !            16: dnl  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            17: dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            18: dnl  MA 02111-1307, USA.
        !            19:
        !            20:
        !            21: dnl  Optimizations:
        !            22: dnl  * Avoid skip instructions
        !            23: dnl  * Put carry-generating and carry-consuming insns consecutively
        !            24: dnl  * Don't allocate any stack, "home" positions for parameteters could be
        !            25: dnl    used.
        !            26:
        !            27: include(`../config.m4')
        !            28:
        !            29: define(`p0',`%r28')
        !            30: define(`p1',`%r29')
        !            31: define(`t32',`%r19')
        !            32: define(`t0',`%r20')
        !            33: define(`t1',`%r21')
        !            34: define(`x',`%r22')
        !            35: define(`m0',`%r23')
        !            36: define(`m1',`%r24')
        !            37:
        !            38: ifdef(`HAVE_ABI_2_0w',
        !            39: `      .level  2.0W
        !            40: ',`    .level  2.0N
        !            41: ')
        !            42: PROLOGUE(mpn_umul_ppmm)
        !            43:        ldo             128(%r30),%r30
        !            44: ifdef(`HAVE_ABI_2_0w',
        !            45: `      std             %r26,-64(%r30)
        !            46:        std             %r25,-56(%r30)
        !            47:        copy            %r24,%r31
        !            48: ',`
        !            49:        depd            %r25,31,32,%r26
        !            50:        std             %r26,-64(%r30)
        !            51:        depd            %r23,31,32,%r24
        !            52:        std             %r24,-56(%r30)
        !            53:        ldw             -180(%r30),%r31
        !            54: ')
        !            55:
        !            56:        fldd            -64(%r30),%fr4
        !            57:        fldd            -56(%r30),%fr5
        !            58:
        !            59:        xmpyu           %fr5R,%fr4R,%fr6
        !            60:        fstd            %fr6,-128(%r30)
        !            61:        xmpyu           %fr5R,%fr4L,%fr7
        !            62:        fstd            %fr7,-120(%r30)
        !            63:        xmpyu           %fr5L,%fr4R,%fr8
        !            64:        fstd            %fr8,-112(%r30)
        !            65:        xmpyu           %fr5L,%fr4L,%fr9
        !            66:        fstd            %fr9,-104(%r30)
        !            67:
        !            68:        depdi,z         1,31,1,t32              C t32 = 2^32
        !            69:
        !            70:        ldd             -128(%r30),p0           C lo = low 64 bit of product
        !            71:        ldd             -120(%r30),m0           C m0 = mid0 64 bit of product
        !            72:        ldd             -112(%r30),m1           C m1 = mid1 64 bit of product
        !            73:        ldd             -104(%r30),p1           C hi = high 64 bit of product
        !            74:
        !            75:        add,l,*nuv      m0,m1,x                 C x = m1+m0
        !            76:         add,l          t32,p1,p1               C propagate carry to mid of p1
        !            77:        depd,z          x,31,32,t0              C lo32(m1+m0)
        !            78:        add             t0,p0,p0
        !            79:        extrd,u         x,31,32,t1              C hi32(m1+m0)
        !            80:        add,dc          t1,p1,p1
        !            81:
        !            82:        std             p0,0(%r31)              C store low half of product
        !            83: ifdef(`HAVE_ABI_2_0w',
        !            84: `      copy            p1,%r28                 C return val in %r28
        !            85: ',`    extrd,u         p1,31,32,%r28           C return val in %r28,%r29
        !            86: ')
        !            87:        bve             (%r2)
        !            88:        ldo             -128(%r30),%r30
        !            89: EPILOGUE(mpn_umul_ppmm)
        !            90: