mul_1.asm
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上传日期:2022-08-06
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- dnl Alpha mpn_mul_1 -- Multiply a limb vector with a limb and store
- dnl the result in 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
- C cl r20
- ASM_START()
- PROLOGUE(mpn_mul_1c)
- ldq r2,0(r17) C r2 = s1_limb
- lda r18,-1(r18) C size--
- mulq r2,r19,r3 C r3 = prod_low
- umulh r2,r19,r4 C r4 = prod_high
- beq r18,$Le1c C jump if size was == 1
- ldq r2,8(r17) C r2 = s1_limb
- lda r18,-1(r18) C size--
- addq r3,r20,r3 C r3 = cy_limb + cl
- stq r3,0(r16)
- cmpult r3,r20,r0 C r0 = carry from (cy_limb + cl)
- bne r18,$Loop C jump if size was == 2
- br r31,$Le2
- $Le1c: addq r3,r20,r3 C r3 = cy_limb + cl
- cmpult r3,r20,r0 C r0 = carry from (cy_limb + cl)
- $Le1: stq r3,0(r16)
- addq r4,r0,r0
- ret r31,(r26),1
- EPILOGUE(mpn_mul_1c)
- PROLOGUE(mpn_mul_1)
- ldq r2,0(r17) C r2 = s1_limb
- lda r18,-1(r18) C size--
- mulq r2,r19,r3 C r3 = prod_low
- bic r31,r31,r0 C clear cy_limb
- umulh r2,r19,r4 C r4 = prod_high
- beq r18,$Le1 C jump if size was == 1
- ldq r2,8(r17) C r2 = s1_limb
- lda r18,-1(r18) C size--
- stq r3,0(r16)
- beq r18,$Le2 C jump if size was == 2
- ALIGN(8)
- $Loop: mulq r2,r19,r3 C r3 = prod_low
- addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
- lda r18,-1(r18) C size--
- umulh r2,r19,r4 C r4 = prod_high
- ldq r2,16(r17) C r2 = s1_limb
- lda r17,8(r17) C s1_ptr++
- addq r3,r0,r3 C r3 = cy_limb + prod_low
- stq r3,8(r16)
- cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
- lda r16,8(r16) C res_ptr++
- bne r18,$Loop
- $Le2: mulq r2,r19,r3 C r3 = prod_low
- addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
- umulh r2,r19,r4 C r4 = prod_high
- addq r3,r0,r3 C r3 = cy_limb + prod_low
- cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
- stq r3,8(r16)
- addq r4,r0,r0 C cy_limb = prod_high + cy
- ret r31,(r26),1
- EPILOGUE(mpn_mul_1)
- ASM_END()