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Annotation of OpenXM_contrib/gmp/mpn/arm/addmul_1.S, Revision 1.1

1.1     ! maekawa     1: @ ARM mpn_mul_1 -- Multiply a limb vector with a limb and add the result to a
        !             2: @ second limb vector.
        !             3: @ Contributed by Robert Harley.
        !             4:
        !             5: @ Copyright (C) 1998, 2000 Free Software Foundation, Inc.
        !             6:
        !             7: @ This file is part of the GNU MP Library.
        !             8:
        !             9: @ The GNU MP Library is free software; you can redistribute it and/or modify
        !            10: @ it under the terms of the GNU Lesser General Public License as published by
        !            11: @ the Free Software Foundation; either version 2.1 of the License, or (at your
        !            12: @ option) any later version.
        !            13:
        !            14: @ The GNU MP Library is distributed in the hope that it will be useful, but
        !            15: @ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            16: @ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            17: @ License for more details.
        !            18:
        !            19: @ You should have received a copy of the GNU Lesser General Public License
        !            20: @ along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            21: @ the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            22: @ MA 02111-1307, USA.
        !            23:
        !            24: #define p r0
        !            25: #define a r1
        !            26: #define n r2
        !            27: #define w r3
        !            28:
        !            29: #define z r11
        !            30:
        !            31: #define ip r12
        !            32: #define sp r13
        !            33: #define lr r14
        !            34: #define pc r15
        !            35:
        !            36: .text
        !            37:        .align  0
        !            38:        .global __gmpn_addmul_1
        !            39:        .type   __gmpn_addmul_1,%function
        !            40: __gmpn_addmul_1:
        !            41:        stmfd   sp!, { r8-r11, lr }
        !            42:        mov     z, #0
        !            43:        mov     ip, #0
        !            44:        movs    n, n, lsr #1
        !            45:        bcc     skip1
        !            46:        ldr     lr, [a], #4
        !            47:        ldr     r9, [p]
        !            48:        umlal   r9, ip, w, lr
        !            49:        str     r9, [p], #4
        !            50: skip1:
        !            51:        movs    n, n, lsr #1
        !            52:        bcc     skip2
        !            53:        ldmia   p, { r9, r10 }
        !            54:        adds    r8, ip, r9
        !            55:        adc     r9, z, #0
        !            56:        ldmia   a!, { ip, lr }
        !            57:        umlal   r8, r9, w, ip
        !            58:        adds    r9, r9, r10
        !            59:        adc     ip, z, #0
        !            60:        umlal   r9, ip, w, lr
        !            61:        stmia   p!, { r8, r9 }
        !            62: skip2:
        !            63:        teq     n, #0
        !            64:        beq     return
        !            65:        stmfd   sp!, { r4-r7 }
        !            66: addmul_loop:
        !            67:        ldmia   p, { r5, r6, r7, r8 }
        !            68:        adds    r4, ip, r5
        !            69:        adc     r5, z, #0
        !            70:        ldmia   a!, { r9, r10, ip, lr }
        !            71:        umlal   r4, r5, w, r9
        !            72:        adds    r5, r5, r6
        !            73:        adc     r6, z, #0
        !            74:        umlal   r5, r6, w, r10
        !            75:        adds    r6, r6, r7
        !            76:        adc     r7, z, #0
        !            77:        umlal   r6, r7, w, ip
        !            78:        adds    r7, r7, r8
        !            79:        adc     ip, z, #0
        !            80:        umlal   r7, ip, w, lr
        !            81:        subs    n, n, #1
        !            82:        stmia   p!, { r4, r5, r6, r7 }
        !            83:        bne     addmul_loop
        !            84:        ldmfd   sp!, { r4-r7 }
        !            85: return:
        !            86:        mov     r0, ip
        !            87:        ldmfd   sp!, { r8-r11, pc }
        !            88: end:
        !            89:        .size   __gmpn_addmul_1, end - __gmpn_addmul_1