diff options
Diffstat (limited to 'rts/gmp/mpn/alpha/ev5/rshift.asm')
| -rw-r--r-- | rts/gmp/mpn/alpha/ev5/rshift.asm | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/rts/gmp/mpn/alpha/ev5/rshift.asm b/rts/gmp/mpn/alpha/ev5/rshift.asm new file mode 100644 index 0000000000..9940d83fad --- /dev/null +++ b/rts/gmp/mpn/alpha/ev5/rshift.asm @@ -0,0 +1,167 @@ +dnl Alpha EV5 __gmpn_rshift -- Shift a number right. + +dnl Copyright (C) 1994, 1995, 2000 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 by +dnl the Free Software Foundation; either version 2.1 of the License, or (at your +dnl 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; see the file COPYING.LIB. If not, write to +dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +dnl MA 02111-1307, USA. + +include(`../config.m4') + +dnl INPUT PARAMETERS +dnl res_ptr r16 +dnl s1_ptr r17 +dnl size r18 +dnl cnt r19 + +dnl This code runs at 3.25 cycles/limb on the EV5. + +ASM_START() +PROLOGUE(mpn_rshift) + ldq r4,0(r17) C load first limb + subq r31,r19,r20 + subq r18,1,r18 + and r18,4-1,r28 C number of limbs in first loop + sll r4,r20,r0 C compute function result + + beq r28,$L0 + subq r18,r28,r18 + + ALIGN(8) +$Loop0: ldq r3,8(r17) + addq r16,8,r16 + srl r4,r19,r5 + addq r17,8,r17 + subq r28,1,r28 + sll r3,r20,r6 + bis r3,r3,r4 + bis r5,r6,r8 + stq r8,-8(r16) + bne r28,$Loop0 + +$L0: srl r4,r19,r24 + beq r18,$Lend +C warm up phase 1 + ldq r1,8(r17) + subq r18,4,r18 + ldq r2,16(r17) + ldq r3,24(r17) + ldq r4,32(r17) + beq r18,$Lend1 +C warm up phase 2 + sll r1,r20,r7 + srl r1,r19,r21 + sll r2,r20,r8 + ldq r1,40(r17) + srl r2,r19,r22 + ldq r2,48(r17) + sll r3,r20,r5 + bis r7,r24,r7 + srl r3,r19,r23 + bis r8,r21,r8 + sll r4,r20,r6 + ldq r3,56(r17) + srl r4,r19,r24 + ldq r4,64(r17) + subq r18,4,r18 + beq r18,$Lend2 + ALIGN(16) +C main loop +$Loop: stq r7,0(r16) + bis r5,r22,r5 + stq r8,8(r16) + bis r6,r23,r6 + + sll r1,r20,r7 + subq r18,4,r18 + srl r1,r19,r21 + unop C ldq r31,-96(r17) + + sll r2,r20,r8 + ldq r1,72(r17) + srl r2,r19,r22 + ldq r2,80(r17) + + stq r5,16(r16) + bis r7,r24,r7 + stq r6,24(r16) + bis r8,r21,r8 + + sll r3,r20,r5 + unop C ldq r31,-96(r17) + srl r3,r19,r23 + addq r16,32,r16 + + sll r4,r20,r6 + ldq r3,88(r17) + srl r4,r19,r24 + ldq r4,96(r17) + + addq r17,32,r17 + bne r18,$Loop +C cool down phase 2/1 +$Lend2: stq r7,0(r16) + bis r5,r22,r5 + stq r8,8(r16) + bis r6,r23,r6 + sll r1,r20,r7 + srl r1,r19,r21 + sll r2,r20,r8 + srl r2,r19,r22 + stq r5,16(r16) + bis r7,r24,r7 + stq r6,24(r16) + bis r8,r21,r8 + sll r3,r20,r5 + srl r3,r19,r23 + sll r4,r20,r6 + srl r4,r19,r24 +C cool down phase 2/2 + stq r7,32(r16) + bis r5,r22,r5 + stq r8,40(r16) + bis r6,r23,r6 + stq r5,48(r16) + stq r6,56(r16) +C cool down phase 2/3 + stq r24,64(r16) + ret r31,(r26),1 + +C cool down phase 1/1 +$Lend1: sll r1,r20,r7 + srl r1,r19,r21 + sll r2,r20,r8 + srl r2,r19,r22 + sll r3,r20,r5 + bis r7,r24,r7 + srl r3,r19,r23 + bis r8,r21,r8 + sll r4,r20,r6 + srl r4,r19,r24 +C cool down phase 1/2 + stq r7,0(r16) + bis r5,r22,r5 + stq r8,8(r16) + bis r6,r23,r6 + stq r5,16(r16) + stq r6,24(r16) + stq r24,32(r16) + ret r31,(r26),1 + +$Lend: stq r24,0(r16) + ret r31,(r26),1 +EPILOGUE(mpn_rshift) +ASM_END() |