addmul_1.asm
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上传日期:2022-08-06
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- dnl Alpha mpn_addmul_1 -- Multiply a limb vector with a limb and add the
- dnl result to a second limb vector.
- dnl Copyright 1992, 1994, 1995, 2000, 2002 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C cycles/limb
- C EV4: 42
- C EV5: 18
- C EV6: 7
- C INPUT PARAMETERS
- C rp r16
- C up r17
- C n r18
- C vl r19
- ASM_START()
- PROLOGUE(mpn_addmul_1)
- ldq r2,0(r17) C r2 = s1_limb
- addq r17,8,r17 C s1_ptr++
- subq r18,1,r18 C size--
- mulq r2,r19,r3 C r3 = prod_low
- ldq r5,0(r16) C r5 = *res_ptr
- umulh r2,r19,r0 C r0 = prod_high
- beq r18,$Lend1 C jump if size was == 1
- ldq r2,0(r17) C r2 = s1_limb
- addq r17,8,r17 C s1_ptr++
- subq r18,1,r18 C size--
- addq r5,r3,r3
- cmpult r3,r5,r4
- stq r3,0(r16)
- addq r16,8,r16 C res_ptr++
- beq r18,$Lend2 C jump if size was == 2
- ALIGN(8)
- $Loop: mulq r2,r19,r3 C r3 = prod_low
- ldq r5,0(r16) C r5 = *res_ptr
- addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
- subq r18,1,r18 C size--
- umulh r2,r19,r4 C r4 = cy_limb
- ldq r2,0(r17) C r2 = s1_limb
- addq r17,8,r17 C s1_ptr++
- addq r3,r0,r3 C r3 = cy_limb + prod_low
- cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
- addq r5,r3,r3
- cmpult r3,r5,r5
- stq r3,0(r16)
- addq r16,8,r16 C res_ptr++
- addq r5,r0,r0 C combine carries
- bne r18,$Loop
- $Lend2: mulq r2,r19,r3 C r3 = prod_low
- ldq r5,0(r16) C r5 = *res_ptr
- addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
- umulh r2,r19,r4 C r4 = cy_limb
- addq r3,r0,r3 C r3 = cy_limb + prod_low
- cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
- addq r5,r3,r3
- cmpult r3,r5,r5
- stq r3,0(r16)
- addq r5,r0,r0 C combine carries
- addq r4,r0,r0 C cy_limb = prod_high + cy
- ret r31,(r26),1
- $Lend1: addq r5,r3,r3
- cmpult r3,r5,r5
- stq r3,0(r16)
- addq r0,r5,r0
- ret r31,(r26),1
- EPILOGUE(mpn_addmul_1)
- ASM_END()