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Diffstat (limited to 'sysdeps/alpha/mul_1.s')
| -rw-r--r-- | sysdeps/alpha/mul_1.s | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/sysdeps/alpha/mul_1.s b/sysdeps/alpha/mul_1.s deleted file mode 100644 index 165c281ac6..0000000000 --- a/sysdeps/alpha/mul_1.s +++ /dev/null @@ -1,85 +0,0 @@ - # Alpha 21064 __mpn_mul_1 -- Multiply a limb vector with a limb and store - # the result in a second limb vector. - - # Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc. - - # This file is part of the GNU MP Library. - - # The GNU MP Library is free software; you can redistribute it and/or modify - # it under the terms of the GNU Lesser General Public License as published by - # the Free Software Foundation; either version 2.1 of the License, or (at your - # option) any later version. - - # The GNU MP Library 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 Lesser General Public - # License for more details. - - # You should have received a copy of the GNU Lesser General Public License - # along with the GNU MP Library; see the file COPYING.LIB. If not, write to - # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, - # MA 02111-1307, USA. - - - # INPUT PARAMETERS - # res_ptr r16 - # s1_ptr r17 - # size r18 - # 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 __mpn_mul_1 - .ent __mpn_mul_1 2 -__mpn_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 __mpn_mul_1 |