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Diffstat (limited to 'mpi/alpha/mpih-mul1.S')
| -rw-r--r-- | mpi/alpha/mpih-mul1.S | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/mpi/alpha/mpih-mul1.S b/mpi/alpha/mpih-mul1.S deleted file mode 100644 index 5b24d98d1..000000000 --- a/mpi/alpha/mpih-mul1.S +++ /dev/null @@ -1,89 +0,0 @@ -/* Alpha 21064 mpih-mul1.S -- Multiply a limb vector with a limb and store - * the result in a second limb vector. - * - * Copyright (C) 1992, 1994, 1995, 1998 Free Software Foundation, Inc. - * - * This file is part of GNUPG. - * - * GNUPG is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * GNUPG is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - - -/******************* - * mpi_limb_t - * mpihelp_mul_1( mpi_ptr_t res_ptr, (r16) - * mpi_ptr_t s1_ptr, (r17) - * mpi_size_t s1_size, (r18) - * mpi_limb_t s2_limb) (r19) - * - * This code runs at 42 cycles/limb on the EV4 and 18 cycles/limb on the EV5. - * - * To improve performance for long multiplications, we would use - * 'fetch' for S1 and 'fetch_m' for RES. It's not obvious how to use - * these instructions without slowing down the general code: 1. We can - * only have two prefetches in operation at any time in the Alpha - * architecture. 2. There will seldom be any special alignment - * between RES_PTR and S1_PTR. Maybe we can simply divide the current - * loop into an inner and outer loop, having the inner loop handle - * exactly one prefetch block? - */ - - .set noreorder - .set noat -.text - .align 3 - .globl mpihelp_mul_1 - .ent mpihelp_mul_1 2 -mpihelp_mul_1: - .frame $30,0,$26 - - ldq $2,0($17) # $2 = s1_limb - subq $18,1,$18 # size-- - mulq $2,$19,$3 # $3 = prod_low - bic $31,$31,$4 # clear cy_limb - umulh $2,$19,$0 # $0 = prod_high - beq $18,Lend1 # jump if size was == 1 - ldq $2,8($17) # $2 = s1_limb - subq $18,1,$18 # size-- - stq $3,0($16) - beq $18,Lend2 # jump if size was == 2 - - .align 3 -Loop: mulq $2,$19,$3 # $3 = prod_low - addq $4,$0,$0 # cy_limb = cy_limb + 'cy' - subq $18,1,$18 # size-- - umulh $2,$19,$4 # $4 = cy_limb - ldq $2,16($17) # $2 = s1_limb - addq $17,8,$17 # s1_ptr++ - addq $3,$0,$3 # $3 = cy_limb + prod_low - stq $3,8($16) - cmpult $3,$0,$0 # $0 = carry from (cy_limb + prod_low) - addq $16,8,$16 # res_ptr++ - bne $18,Loop - -Lend2: mulq $2,$19,$3 # $3 = prod_low - addq $4,$0,$0 # cy_limb = cy_limb + 'cy' - umulh $2,$19,$4 # $4 = cy_limb - addq $3,$0,$3 # $3 = cy_limb + prod_low - cmpult $3,$0,$0 # $0 = carry from (cy_limb + prod_low) - stq $3,8($16) - addq $4,$0,$0 # cy_limb = prod_high + cy - ret $31,($26),1 -Lend1: stq $3,0($16) - ret $31,($26),1 - - .end mpihelp_mul_1 - - |