+++ /dev/null
-dnl PowerPC-32 mpn_lshift -- Shift a number left.
-
-dnl Copyright (C) 1995, 1998, 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.
-
-
-dnl INPUT PARAMETERS
-dnl res_ptr r3
-dnl s1_ptr r4
-dnl size r5
-dnl cnt r6
-
-include(`../config.m4')
-
-ASM_START()
-PROLOGUE(mpn_lshift)
- cmpi cr0,r5,12 C more than 12 limbs?
- slwi r0,r5,2
- add r4,r4,r0 C make r4 point at end of s1
- add r7,r3,r0 C make r7 point at end of res
- bgt .LBIG C branch if more than 12 limbs
-
- mtctr r5 C copy size into CTR
- subfic r8,r6,32
- lwzu r11,-4(r4) C load first s1 limb
- srw r3,r11,r8 C compute function return value
- bdz .Lend1
-
-.Loop: lwzu r10,-4(r4)
- slw r9,r11,r6
- srw r12,r10,r8
- or r9,r9,r12
- stwu r9,-4(r7)
- bdz .Lend2
- lwzu r11,-4(r4)
- slw r9,r10,r6
- srw r12,r11,r8
- or r9,r9,r12
- stwu r9,-4(r7)
- bdnz .Loop
-
-.Lend1: slw r0,r11,r6
- stw r0,-4(r7)
- blr
-.Lend2: slw r0,r10,r6
- stw r0,-4(r7)
- blr
-
-.LBIG:
- stmw r24,-32(r1) C save registers we are supposed to preserve
- lwzu r9,-4(r4)
- subfic r8,r6,32
- srw r3,r9,r8 C compute function return value
- slw r0,r9,r6
- addi r5,r5,-1
-
- andi. r10,r5,3 C count for spill loop
- beq .Le
- mtctr r10
- lwzu r28,-4(r4)
- bdz .Lxe0
-
-.Loop0: slw r12,r28,r6
- srw r24,r28,r8
- lwzu r28,-4(r4)
- or r24,r0,r24
- stwu r24,-4(r7)
- mr r0,r12
- bdnz .Loop0 C taken at most once!
-
-.Lxe0: slw r12,r28,r6
- srw r24,r28,r8
- or r24,r0,r24
- stwu r24,-4(r7)
- mr r0,r12
-
-.Le: srwi r5,r5,2 C count for unrolled loop
- addi r5,r5,-1
- mtctr r5
- lwz r28,-4(r4)
- lwz r29,-8(r4)
- lwz r30,-12(r4)
- lwzu r31,-16(r4)
-
-.LoopU: slw r9,r28,r6
- srw r24,r28,r8
- lwz r28,-4(r4)
- slw r10,r29,r6
- srw r25,r29,r8
- lwz r29,-8(r4)
- slw r11,r30,r6
- srw r26,r30,r8
- lwz r30,-12(r4)
- slw r12,r31,r6
- srw r27,r31,r8
- lwzu r31,-16(r4)
- or r24,r0,r24
- stw r24,-4(r7)
- or r25,r9,r25
- stw r25,-8(r7)
- or r26,r10,r26
- stw r26,-12(r7)
- or r27,r11,r27
- stwu r27,-16(r7)
- mr r0,r12
- bdnz .LoopU
-
- slw r9,r28,r6
- srw r24,r28,r8
- slw r10,r29,r6
- srw r25,r29,r8
- slw r11,r30,r6
- srw r26,r30,r8
- slw r12,r31,r6
- srw r27,r31,r8
- or r24,r0,r24
- stw r24,-4(r7)
- or r25,r9,r25
- stw r25,-8(r7)
- or r26,r10,r26
- stw r26,-12(r7)
- or r27,r11,r27
- stwu r27,-16(r7)
- mr r0,r12
-
- stw r0,-4(r7)
- lmw r24,-32(r1) C restore registers
- blr
-EPILOGUE(mpn_lshift)
projects / ghc-hetmet.git / blobdiff