diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | sysdeps/rs6000/add_n.s | 81 | ||||
| -rw-r--r-- | sysdeps/rs6000/addmul_1.s | 123 | ||||
| -rw-r--r-- | sysdeps/rs6000/ffs.c | 42 | ||||
| -rw-r--r-- | sysdeps/rs6000/lshift.s | 59 | ||||
| -rw-r--r-- | sysdeps/rs6000/memcopy.h | 86 | ||||
| -rw-r--r-- | sysdeps/rs6000/mul_1.s | 110 | ||||
| -rw-r--r-- | sysdeps/rs6000/rshift.s | 57 | ||||
| -rw-r--r-- | sysdeps/rs6000/sub_n.s | 82 | ||||
| -rw-r--r-- | sysdeps/rs6000/submul_1.s | 128 |
10 files changed, 4 insertions, 768 deletions
@@ -1,3 +1,7 @@ +2006-02-28 Roland McGrath <roland@redhat.com> + + * sysdeps/rs6000: Directory removed, saved in ports repository. + 2006-03-01 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/unix/sysv/linux/sh/pread.c: Copy in mips pread.c. diff --git a/sysdeps/rs6000/add_n.s b/sysdeps/rs6000/add_n.s deleted file mode 100644 index 216874e7a4..0000000000 --- a/sysdeps/rs6000/add_n.s +++ /dev/null @@ -1,81 +0,0 @@ -# IBM POWER __mpn_add_n -- Add two limb vectors of equal, non-zero length. - -# Copyright (C) 1992, 1994, 1995, 1996 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 r3 -# s1_ptr r4 -# s2_ptr r5 -# size r6 - - .toc - .extern __mpn_add_n[DS] - .extern .__mpn_add_n -.csect [PR] - .align 2 - .globl __mpn_add_n - .globl .__mpn_add_n - .csect __mpn_add_n[DS] -__mpn_add_n: - .long .__mpn_add_n, TOC[tc0], 0 - .csect [PR] -.__mpn_add_n: - andil. 10,6,1 # odd or even number of limbs? - l 8,0(4) # load least significant s1 limb - l 0,0(5) # load least significant s2 limb - cal 3,-4(3) # offset res_ptr, it's updated before it's used - sri 10,6,1 # count for unrolled loop - a 7,0,8 # add least significant limbs, set cy - mtctr 10 # copy count into CTR - beq 0,Leven # branch if even # of limbs (# of limbs >= 2) - -# We have an odd # of limbs. Add the first limbs separately. - cmpi 1,10,0 # is count for unrolled loop zero? - bne 1,L1 # branch if not - st 7,4(3) - aze 3,10 # use the fact that r10 is zero... - br # return - -# We added least significant limbs. Now reload the next limbs to enter loop. -L1: lu 8,4(4) # load s1 limb and update s1_ptr - lu 0,4(5) # load s2 limb and update s2_ptr - stu 7,4(3) - ae 7,0,8 # add limbs, set cy -Leven: lu 9,4(4) # load s1 limb and update s1_ptr - lu 10,4(5) # load s2 limb and update s2_ptr - bdz Lend # If done, skip loop - -Loop: lu 8,4(4) # load s1 limb and update s1_ptr - lu 0,4(5) # load s2 limb and update s2_ptr - ae 11,9,10 # add previous limbs with cy, set cy - stu 7,4(3) # - lu 9,4(4) # load s1 limb and update s1_ptr - lu 10,4(5) # load s2 limb and update s2_ptr - ae 7,0,8 # add previous limbs with cy, set cy - stu 11,4(3) # - bdn Loop # decrement CTR and loop back - -Lend: ae 11,9,10 # add limbs with cy, set cy - st 7,4(3) # - st 11,8(3) # - lil 3,0 # load cy into ... - aze 3,3 # ... return value register - br diff --git a/sysdeps/rs6000/addmul_1.s b/sysdeps/rs6000/addmul_1.s deleted file mode 100644 index 7cd743cede..0000000000 --- a/sysdeps/rs6000/addmul_1.s +++ /dev/null @@ -1,123 +0,0 @@ -# IBM POWER __mpn_addmul_1 -- Multiply a limb vector with a limb and add -# the result to a second limb vector. - -# Copyright (C) 1992, 1994 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 r3 -# s1_ptr r4 -# size r5 -# s2_limb r6 - -# The RS/6000 has no unsigned 32x32->64 bit multiplication instruction. To -# obtain that operation, we have to use the 32x32->64 signed multiplication -# instruction, and add the appropriate compensation to the high limb of the -# result. We add the multiplicand if the multiplier has its most significant -# bit set, and we add the multiplier if the multiplicand has its most -# significant bit set. We need to preserve the carry flag between each -# iteration, so we have to compute the compensation carefully (the natural, -# srai+and doesn't work). Since the POWER architecture has a branch unit -# we can branch in zero cycles, so that's how we perform the additions. - - .toc - .csect .__mpn_addmul_1[PR] - .align 2 - .globl __mpn_addmul_1 - .globl .__mpn_addmul_1 - .csect __mpn_addmul_1[DS] -__mpn_addmul_1: - .long .__mpn_addmul_1[PR], TOC[tc0], 0 - .csect .__mpn_addmul_1[PR] -.__mpn_addmul_1: - - cal 3,-4(3) - l 0,0(4) - cmpi 0,6,0 - mtctr 5 - mul 9,0,6 - srai 7,0,31 - and 7,7,6 - mfmq 8 - cax 9,9,7 - l 7,4(3) - a 8,8,7 # add res_limb - blt Lneg -Lpos: bdz Lend - -Lploop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - mfmq 0 - ae 8,0,9 # low limb + old_cy_limb + old cy - l 7,4(3) - aze 10,10 # propagate cy to new cy_limb - a 8,8,7 # add res_limb - bge Lp0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Lp0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - mfmq 0 - ae 8,0,10 - l 7,4(3) - aze 9,9 - a 8,8,7 - bge Lp1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Lp1: bdn Lploop - - b Lend - -Lneg: cax 9,9,0 - bdz Lend -Lnloop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - mfmq 7 - ae 8,7,9 - l 7,4(3) - ae 10,10,0 # propagate cy to new cy_limb - a 8,8,7 # add res_limb - bge Ln0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Ln0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - mfmq 7 - ae 8,7,10 - l 7,4(3) - ae 9,9,0 # propagate cy to new cy_limb - a 8,8,7 # add res_limb - bge Ln1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Ln1: bdn Lnloop - b Lend - -Lend0: cal 9,0(10) -Lend: st 8,4(3) - aze 3,9 - br diff --git a/sysdeps/rs6000/ffs.c b/sysdeps/rs6000/ffs.c deleted file mode 100644 index 619412cb50..0000000000 --- a/sysdeps/rs6000/ffs.c +++ /dev/null @@ -1,42 +0,0 @@ -/* ffs -- find first set bit in a word, counted from least significant end. - For IBM rs6000. - Copyright (C) 1991, 1992, 1997, 2004, 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Torbjorn Granlund (tege@sics.se). - - The GNU C 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 C 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 C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <string.h> - -#undef ffs - -#ifdef __GNUC__ - -int -__ffs (x) - int x; -{ - int cnt; - - asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x)); - return 32 - cnt; -} -weak_alias (__ffs, ffs) -libc_hidden_builtin_def (ffs) - -#else -#include <string/ffs.c> -#endif diff --git a/sysdeps/rs6000/lshift.s b/sysdeps/rs6000/lshift.s deleted file mode 100644 index 8ccba7407e..0000000000 --- a/sysdeps/rs6000/lshift.s +++ /dev/null @@ -1,59 +0,0 @@ -# IBM POWER __mpn_lshift -- - -# Copyright (C) 1992, 1994 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 r3 -# s_ptr r4 -# size r5 -# cnt r6 - - .toc - .extern __mpn_lshift[DS] - .extern .__mpn_lshift -.csect [PR] - .align 2 - .globl __mpn_lshift - .globl .__mpn_lshift - .csect __mpn_lshift[DS] -__mpn_lshift: - .long .__mpn_lshift, TOC[tc0], 0 - .csect [PR] -.__mpn_lshift: - sli 0,5,2 - cax 9,3,0 - cax 4,4,0 - sfi 8,6,32 - mtctr 5 # put limb count in CTR loop register - lu 0,-4(4) # read most significant limb - sre 3,0,8 # compute carry out limb, and init MQ register - bdz Lend2 # if just one limb, skip loop - lu 0,-4(4) # read 2:nd most significant limb - sreq 7,0,8 # compute most significant limb of result - bdz Lend # if just two limb, skip loop -Loop: lu 0,-4(4) # load next lower limb - stu 7,-4(9) # store previous result during read latency - sreq 7,0,8 # compute result limb - bdn Loop # loop back until CTR is zero -Lend: stu 7,-4(9) # store 2:nd least significant limb -Lend2: sle 7,0,6 # compute least significant limb - st 7,-4(9) # store it" \ - br diff --git a/sysdeps/rs6000/memcopy.h b/sysdeps/rs6000/memcopy.h deleted file mode 100644 index 8bdb6e9766..0000000000 --- a/sysdeps/rs6000/memcopy.h +++ /dev/null @@ -1,86 +0,0 @@ -/* Copyright (C) 1991, 1997 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C 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 C 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 C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdeps/generic/memcopy.h> - -#undef OP_T_THRES -#define OP_T_THRES 32 - -#undef BYTE_COPY_FWD -#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \ - do \ - { \ - size_t __nbytes = nbytes; \ - asm volatile("mtspr 1,%2\n" \ - "lsx 6,0,%1\n" \ - "stsx 6,0,%0" : /* No outputs. */ : \ - "b" (dst_bp), "b" (src_bp), "r" (__nbytes) : \ - "6", "7", "8", "9", "10", "11", "12", "13"); \ - dst_bp += __nbytes; \ - src_bp += __nbytes; \ - } while (0) - -#undef BYTE_COPY_BWD -#define BYTE_COPY_BWD(dst_ep, src_ep, nbytes) \ - do \ - { \ - size_t __nbytes = (nbytes); \ - dst_ep -= __nbytes; \ - src_ep -= __nbytes; \ - asm volatile("mtspr 1,%2\n" \ - "lsx 6,0,%1\n" \ - "stsx 6,0,%0" : /* No outputs. */ : \ - "b" (dst_ep), "b" (src_ep), "r" (__nbytes) : \ - "6", "7", "8", "9", "10", "11", "12", "13"); \ - } while (0) - -#undef WORD_COPY_FWD -#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \ - do \ - { \ - size_t __nblocks = (nbytes) / 32; \ - if (__nblocks != 0) \ - asm volatile("mtctr %4\n" \ - "lsi 6,%1,32\n" \ - "ai %1,%1,32\n" \ - "stsi 6,%0,32\n" \ - "ai %0,%0,32\n" \ - "bdn $-16" : \ - "=b" (dst_bp), "=b" (src_bp) : \ - "0" (dst_bp), "1" (src_bp), "r" (__nblocks) : \ - "6", "7", "8", "9", "10", "11", "12", "13"); \ - (nbytes_left) = (nbytes) % 32; \ - } while (0) - -#undef WORD_COPY_BWD -#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \ - do \ - { \ - size_t __nblocks = (nbytes) / 32; \ - if (__nblocks != 0) \ - asm volatile("mtctr %4\n" \ - "ai %1,%1,-32\n" \ - "lsi 6,%1,32\n" \ - "ai %0,%0,-32\n" \ - "stsi 6,%0,32\n" \ - "bdn $-16" : \ - "=b" (dst_ep), "=b" (src_ep) : \ - "0" (dst_ep), "1" (src_ep), "r" (__nblocks) : \ - "6", "7", "8", "9", "10", "11", "12", "13"); \ - (nbytes_left) = (nbytes) % 32; \ - } while (0) diff --git a/sysdeps/rs6000/mul_1.s b/sysdeps/rs6000/mul_1.s deleted file mode 100644 index c0feef4b72..0000000000 --- a/sysdeps/rs6000/mul_1.s +++ /dev/null @@ -1,110 +0,0 @@ -# IBM POWER __mpn_mul_1 -- Multiply a limb vector with a limb and store -# the result in a second limb vector. - -# Copyright (C) 1992, 1994 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 r3 -# s1_ptr r4 -# size r5 -# s2_limb r6 - -# The RS/6000 has no unsigned 32x32->64 bit multiplication instruction. To -# obtain that operation, we have to use the 32x32->64 signed multiplication -# instruction, and add the appropriate compensation to the high limb of the -# result. We add the multiplicand if the multiplier has its most significant -# bit set, and we add the multiplier if the multiplicand has its most -# significant bit set. We need to preserve the carry flag between each -# iteration, so we have to compute the compensation carefully (the natural, -# srai+and doesn't work). Since the POWER architecture has a branch unit -# we can branch in zero cycles, so that's how we perform the additions. - - .toc - .csect .__mpn_mul_1[PR] - .align 2 - .globl __mpn_mul_1 - .globl .__mpn_mul_1 - .csect __mpn_mul_1[DS] -__mpn_mul_1: - .long .__mpn_mul_1[PR], TOC[tc0], 0 - .csect .__mpn_mul_1[PR] -.__mpn_mul_1: - - cal 3,-4(3) - l 0,0(4) - cmpi 0,6,0 - mtctr 5 - mul 9,0,6 - srai 7,0,31 - and 7,7,6 - mfmq 8 - ai 0,0,0 # reset carry - cax 9,9,7 - blt Lneg -Lpos: bdz Lend -Lploop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - mfmq 0 - ae 8,0,9 - bge Lp0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Lp0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - mfmq 0 - ae 8,0,10 - bge Lp1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Lp1: bdn Lploop - b Lend - -Lneg: cax 9,9,0 - bdz Lend -Lnloop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - cax 10,10,0 # adjust high limb for negative s2_limb - mfmq 0 - ae 8,0,9 - bge Ln0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Ln0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - cax 9,9,0 # adjust high limb for negative s2_limb - mfmq 0 - ae 8,0,10 - bge Ln1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Ln1: bdn Lnloop - b Lend - -Lend0: cal 9,0(10) -Lend: st 8,4(3) - aze 3,9 - br diff --git a/sysdeps/rs6000/rshift.s b/sysdeps/rs6000/rshift.s deleted file mode 100644 index 145218fabd..0000000000 --- a/sysdeps/rs6000/rshift.s +++ /dev/null @@ -1,57 +0,0 @@ -# IBM POWER __mpn_rshift -- - -# Copyright (C) 1992, 1994 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 r3 -# s_ptr r4 -# size r5 -# cnt r6 - - .toc - .extern __mpn_rshift[DS] - .extern .__mpn_rshift -.csect [PR] - .align 2 - .globl __mpn_rshift - .globl .__mpn_rshift - .csect __mpn_rshift[DS] -__mpn_rshift: - .long .__mpn_rshift, TOC[tc0], 0 - .csect [PR] -.__mpn_rshift: - sfi 8,6,32 - mtctr 5 # put limb count in CTR loop register - l 0,0(4) # read least significant limb - ai 9,3,-4 # adjust res_ptr since it's offset in the stu:s - sle 3,0,8 # compute carry limb, and init MQ register - bdz Lend2 # if just one limb, skip loop - lu 0,4(4) # read 2:nd least significant limb - sleq 7,0,8 # compute least significant limb of result - bdz Lend # if just two limb, skip loop -Loop: lu 0,4(4) # load next higher limb - stu 7,4(9) # store previous result during read latency - sleq 7,0,8 # compute result limb - bdn Loop # loop back until CTR is zero -Lend: stu 7,4(9) # store 2:nd most significant limb -Lend2: sre 7,0,6 # compute most significant limb - st 7,4(9) # store it" \ - br diff --git a/sysdeps/rs6000/sub_n.s b/sysdeps/rs6000/sub_n.s deleted file mode 100644 index d931870935..0000000000 --- a/sysdeps/rs6000/sub_n.s +++ /dev/null @@ -1,82 +0,0 @@ -# IBM POWER __mpn_sub_n -- Subtract two limb vectors of equal, non-zero length. - -# Copyright (C) 1992, 1994, 1995, 1996 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 r3 -# s1_ptr r4 -# s2_ptr r5 -# size r6 - - .toc - .extern __mpn_sub_n[DS] - .extern .__mpn_sub_n -.csect [PR] - .align 2 - .globl __mpn_sub_n - .globl .__mpn_sub_n - .csect __mpn_sub_n[DS] -__mpn_sub_n: - .long .__mpn_sub_n, TOC[tc0], 0 - .csect [PR] -.__mpn_sub_n: - andil. 10,6,1 # odd or even number of limbs? - l 8,0(4) # load least significant s1 limb - l 0,0(5) # load least significant s2 limb - cal 3,-4(3) # offset res_ptr, it's updated before it's used - sri 10,6,1 # count for unrolled loop - sf 7,0,8 # subtract least significant limbs, set cy - mtctr 10 # copy count into CTR - beq 0,Leven # branch if even # of limbs (# of limbs >= 2) - -# We have an odd # of limbs. Add the first limbs separately. - cmpi 1,10,0 # is count for unrolled loop zero? - bne 1,L1 # branch if not - st 7,4(3) - sfe 3,0,0 # load !cy into ... - sfi 3,3,0 # ... return value register - br # return - -# We added least significant limbs. Now reload the next limbs to enter loop. -L1: lu 8,4(4) # load s1 limb and update s1_ptr - lu 0,4(5) # load s2 limb and update s2_ptr - stu 7,4(3) - sfe 7,0,8 # subtract limbs, set cy -Leven: lu 9,4(4) # load s1 limb and update s1_ptr - lu 10,4(5) # load s2 limb and update s2_ptr - bdz Lend # If done, skip loop - -Loop: lu 8,4(4) # load s1 limb and update s1_ptr - lu 0,4(5) # load s2 limb and update s2_ptr - sfe 11,10,9 # subtract previous limbs with cy, set cy - stu 7,4(3) # - lu 9,4(4) # load s1 limb and update s1_ptr - lu 10,4(5) # load s2 limb and update s2_ptr - sfe 7,0,8 # subtract previous limbs with cy, set cy - stu 11,4(3) # - bdn Loop # decrement CTR and loop back - -Lend: sfe 11,10,9 # subtract limbs with cy, set cy - st 7,4(3) # - st 11,8(3) # - sfe 3,0,0 # load !cy into ... - sfi 3,3,0 # ... return value register - br diff --git a/sysdeps/rs6000/submul_1.s b/sysdeps/rs6000/submul_1.s deleted file mode 100644 index 41095ab001..0000000000 --- a/sysdeps/rs6000/submul_1.s +++ /dev/null @@ -1,128 +0,0 @@ -# IBM POWER __mpn_submul_1 -- Multiply a limb vector with a limb and subtract -# the result from a second limb vector. - -# Copyright (C) 1992, 1994 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 r3 -# s1_ptr r4 -# size r5 -# s2_limb r6 - -# The RS/6000 has no unsigned 32x32->64 bit multiplication instruction. To -# obtain that operation, we have to use the 32x32->64 signed multiplication -# instruction, and add the appropriate compensation to the high limb of the -# result. We add the multiplicand if the multiplier has its most significant -# bit set, and we add the multiplier if the multiplicand has its most -# significant bit set. We need to preserve the carry flag between each -# iteration, so we have to compute the compensation carefully (the natural, -# srai+and doesn't work). Since the POWER architecture has a branch unit -# we can branch in zero cycles, so that's how we perform the additions. - - .toc - .csect .__mpn_submul_1[PR] - .align 2 - .globl __mpn_submul_1 - .globl .__mpn_submul_1 - .csect __mpn_submul_1[DS] -__mpn_submul_1: - .long .__mpn_submul_1[PR], TOC[tc0], 0 - .csect .__mpn_submul_1[PR] -.__mpn_submul_1: - - cal 3,-4(3) - l 0,0(4) - cmpi 0,6,0 - mtctr 5 - mul 9,0,6 - srai 7,0,31 - and 7,7,6 - mfmq 11 - cax 9,9,7 - l 7,4(3) - sf 8,11,7 # add res_limb - a 11,8,11 # invert cy (r11 is junk) - blt Lneg -Lpos: bdz Lend - -Lploop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - mfmq 0 - ae 11,0,9 # low limb + old_cy_limb + old cy - l 7,4(3) - aze 10,10 # propagate cy to new cy_limb - sf 8,11,7 # add res_limb - a 11,8,11 # invert cy (r11 is junk) - bge Lp0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Lp0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - mfmq 0 - ae 11,0,10 - l 7,4(3) - aze 9,9 - sf 8,11,7 - a 11,8,11 # invert cy (r11 is junk) - bge Lp1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Lp1: bdn Lploop - - b Lend - -Lneg: cax 9,9,0 - bdz Lend -Lnloop: lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 10,0,6 - mfmq 7 - ae 11,7,9 - l 7,4(3) - ae 10,10,0 # propagate cy to new cy_limb - sf 8,11,7 # add res_limb - a 11,8,11 # invert cy (r11 is junk) - bge Ln0 - cax 10,10,6 # adjust high limb for negative limb from s1 -Ln0: bdz Lend0 - lu 0,4(4) - stu 8,4(3) - cmpi 0,0,0 - mul 9,0,6 - mfmq 7 - ae 11,7,10 - l 7,4(3) - ae 9,9,0 # propagate cy to new cy_limb - sf 8,11,7 # add res_limb - a 11,8,11 # invert cy (r11 is junk) - bge Ln1 - cax 9,9,6 # adjust high limb for negative limb from s1 -Ln1: bdn Lnloop - b Lend - -Lend0: cal 9,0(10) -Lend: st 8,4(3) - aze 3,9 - br |