diff options
Diffstat (limited to 'ports/sysdeps/alpha/alphaev5/rshift.S')
| -rw-r--r-- | ports/sysdeps/alpha/alphaev5/rshift.S | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/ports/sysdeps/alpha/alphaev5/rshift.S b/ports/sysdeps/alpha/alphaev5/rshift.S new file mode 100644 index 0000000000..c62d26eac5 --- /dev/null +++ b/ports/sysdeps/alpha/alphaev5/rshift.S @@ -0,0 +1,170 @@ + # Alpha EV5 __mpn_rshift -- + + # Copyright (C) 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. If not, see <http://www.gnu.org/licenses/>. + + + # INPUT PARAMETERS + # res_ptr r16 + # s1_ptr r17 + # size r18 + # cnt r19 + + # This code runs at 3.25 cycles/limb on the EV5. + + .set noreorder + .set noat +.text + .align 3 + .globl __mpn_rshift + .ent __mpn_rshift +__mpn_rshift: + .frame $30,0,$26,0 + + ldq $4,0($17) # load first limb + subq $31,$19,$20 + subq $18,1,$18 + and $18,4-1,$28 # number of limbs in first loop + sll $4,$20,$0 # compute function result + + beq $28,.L0 + subq $18,$28,$18 + + .align 3 +.Loop0: ldq $3,8($17) + addq $16,8,$16 + srl $4,$19,$5 + addq $17,8,$17 + subq $28,1,$28 + sll $3,$20,$6 + or $3,$3,$4 + or $5,$6,$8 + stq $8,-8($16) + bne $28,.Loop0 + +.L0: srl $4,$19,$24 + beq $18,.Lend + # warm up phase 1 + ldq $1,8($17) + subq $18,4,$18 + ldq $2,16($17) + ldq $3,24($17) + ldq $4,32($17) + beq $18,.Lend1 + # warm up phase 2 + sll $1,$20,$7 + srl $1,$19,$21 + sll $2,$20,$8 + ldq $1,40($17) + srl $2,$19,$22 + ldq $2,48($17) + sll $3,$20,$5 + or $7,$24,$7 + srl $3,$19,$23 + or $8,$21,$8 + sll $4,$20,$6 + ldq $3,56($17) + srl $4,$19,$24 + ldq $4,64($17) + subq $18,4,$18 + beq $18,.Lend2 + .align 4 + # main loop +.Loop: stq $7,0($16) + or $5,$22,$5 + stq $8,8($16) + or $6,$23,$6 + + sll $1,$20,$7 + subq $18,4,$18 + srl $1,$19,$21 + unop # ldq $31,-96($17) + + sll $2,$20,$8 + ldq $1,72($17) + srl $2,$19,$22 + ldq $2,80($17) + + stq $5,16($16) + or $7,$24,$7 + stq $6,24($16) + or $8,$21,$8 + + sll $3,$20,$5 + unop # ldq $31,-96($17) + srl $3,$19,$23 + addq $16,32,$16 + + sll $4,$20,$6 + ldq $3,88($17) + srl $4,$19,$24 + ldq $4,96($17) + + addq $17,32,$17 + bne $18,.Loop + # cool down phase 2/1 +.Lend2: stq $7,0($16) + or $5,$22,$5 + stq $8,8($16) + or $6,$23,$6 + sll $1,$20,$7 + srl $1,$19,$21 + sll $2,$20,$8 + srl $2,$19,$22 + stq $5,16($16) + or $7,$24,$7 + stq $6,24($16) + or $8,$21,$8 + sll $3,$20,$5 + srl $3,$19,$23 + sll $4,$20,$6 + srl $4,$19,$24 + # cool down phase 2/2 + stq $7,32($16) + or $5,$22,$5 + stq $8,40($16) + or $6,$23,$6 + stq $5,48($16) + stq $6,56($16) + # cool down phase 2/3 + stq $24,64($16) + ret $31,($26),1 + + # cool down phase 1/1 +.Lend1: sll $1,$20,$7 + srl $1,$19,$21 + sll $2,$20,$8 + srl $2,$19,$22 + sll $3,$20,$5 + or $7,$24,$7 + srl $3,$19,$23 + or $8,$21,$8 + sll $4,$20,$6 + srl $4,$19,$24 + # cool down phase 1/2 + stq $7,0($16) + or $5,$22,$5 + stq $8,8($16) + or $6,$23,$6 + stq $5,16($16) + stq $6,24($16) + stq $24,32($16) + ret $31,($26),1 + +.Lend: stq $24,0($16) + ret $31,($26),1 + .end __mpn_rshift |