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ff4ff35918
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103 lines
2.9 KiB
NASM
103 lines
2.9 KiB
NASM
dnl Alpha mpn_mul_1 -- Multiply a limb vector with a limb and store
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dnl the result in a second limb vector.
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dnl Copyright 1992, 1994, 1995, 2000, 2002 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C EV4: 42
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C EV5: 18
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C EV6: 7
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C INPUT PARAMETERS
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C rp r16
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C up r17
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C n r18
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C vl r19
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C cl r20
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ASM_START()
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PROLOGUE(mpn_mul_1c)
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ldq r2,0(r17) C r2 = s1_limb
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lda r18,-1(r18) C size--
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mulq r2,r19,r3 C r3 = prod_low
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umulh r2,r19,r4 C r4 = prod_high
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beq r18,$Le1c C jump if size was == 1
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ldq r2,8(r17) C r2 = s1_limb
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lda r18,-1(r18) C size--
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addq r3,r20,r3 C r3 = cy_limb + cl
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stq r3,0(r16)
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cmpult r3,r20,r0 C r0 = carry from (cy_limb + cl)
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bne r18,$Loop C jump if size was == 2
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br r31,$Le2
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$Le1c: addq r3,r20,r3 C r3 = cy_limb + cl
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cmpult r3,r20,r0 C r0 = carry from (cy_limb + cl)
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$Le1: stq r3,0(r16)
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addq r4,r0,r0
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ret r31,(r26),1
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EPILOGUE(mpn_mul_1c)
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PROLOGUE(mpn_mul_1)
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ldq r2,0(r17) C r2 = s1_limb
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lda r18,-1(r18) C size--
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mulq r2,r19,r3 C r3 = prod_low
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bic r31,r31,r0 C clear cy_limb
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umulh r2,r19,r4 C r4 = prod_high
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beq r18,$Le1 C jump if size was == 1
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ldq r2,8(r17) C r2 = s1_limb
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lda r18,-1(r18) C size--
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stq r3,0(r16)
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beq r18,$Le2 C jump if size was == 2
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ALIGN(8)
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$Loop: mulq r2,r19,r3 C r3 = prod_low
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addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
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lda r18,-1(r18) C size--
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umulh r2,r19,r4 C r4 = prod_high
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ldq r2,16(r17) C r2 = s1_limb
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lda r17,8(r17) C s1_ptr++
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addq r3,r0,r3 C r3 = cy_limb + prod_low
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stq r3,8(r16)
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cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
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lda r16,8(r16) C res_ptr++
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bne r18,$Loop
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$Le2: mulq r2,r19,r3 C r3 = prod_low
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addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
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umulh r2,r19,r4 C r4 = prod_high
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addq r3,r0,r3 C r3 = cy_limb + prod_low
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cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
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stq r3,8(r16)
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addq r4,r0,r0 C cy_limb = prod_high + cy
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ret r31,(r26),1
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EPILOGUE(mpn_mul_1)
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ASM_END()
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