| dnl HP-PA __udiv_qrnnd division support, used from longlong.h. |
| dnl This version runs fast on PA 7000 and later. |
| |
| dnl Copyright 1993, 1994, 2000, 2001, 2003 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 |
| dnl by the Free Software Foundation; either version 3 of the License, or (at |
| dnl your 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. If not, see http://www.gnu.org/licenses/. |
| |
| include(`../config.m4') |
| |
| C INPUT PARAMETERS |
| C rem_ptr gr26 |
| C n1 gr25 |
| C n0 gr24 |
| C d gr23 |
| |
| C This file has caused a lot of trouble, since it demands PIC reference to |
| C static data, which triggers bugs in gas (at least version 2.7 through |
| C 2.11.2). When the bug is triggered, many bogus relocs are generated. The |
| C current solution is to stuff data right into the code, and refer it using |
| C absolute offsets. Fragile to be sure, but nothing else seems to work. |
| |
| ASM_START() |
| ifdef(`PIC',`', |
| ` RODATA |
| INT64(0000, 0x43f00000, 0x0) C 2^64 |
| ') |
| |
| PROLOGUE(mpn_udiv_qrnnd) |
| C .callinfo frame=64,no_calls |
| |
| ldo 64(%r30),%r30 |
| |
| stws %r25,-16(0,%r30) C n_hi |
| stws %r24,-12(0,%r30) C n_lo |
| |
| ifdef(`PIC', |
| ` bl .+20,%r31 |
| dep %r0,31,2,%r31 |
| .word 0x0 C padding for alignment |
| .word 0x43f00000, 0x0 C 2^64 |
| ldo 4(%r31),%r31', |
| ` ldil `L'%L(0000),%r31 |
| ldo R%L(0000)(%r31),%r31') |
| |
| fldds -16(0,%r30),%fr5 |
| stws %r23,-12(0,%r30) |
| comib,<= 0,%r25,L(1) |
| fcnvxf,dbl,dbl %fr5,%fr5 |
| fldds 0(0,%r31),%fr4 |
| fadd,dbl %fr4,%fr5,%fr5 |
| |
| LDEF(1) |
| fcpy,sgl %fr0,%fr6L |
| fldws -12(0,%r30),%fr6R |
| fcnvxf,dbl,dbl %fr6,%fr4 |
| |
| fdiv,dbl %fr5,%fr4,%fr5 |
| |
| fcnvfx,dbl,dbl %fr5,%fr4 |
| fstws %fr4R,-16(%r30) |
| xmpyu %fr4R,%fr6R,%fr6 |
| ldws -16(%r30),%r28 |
| fstds %fr6,-16(0,%r30) |
| ldws -12(0,%r30),%r21 |
| ldws -16(0,%r30),%r20 |
| sub %r24,%r21,%r22 |
| subb %r25,%r20,%r20 |
| comib,= 0,%r20,L(2) |
| ldo -64(%r30),%r30 |
| |
| add %r22,%r23,%r22 |
| ldo -1(%r28),%r28 |
| |
| LDEF(2) |
| bv 0(%r2) |
| stws %r22,0(0,%r26) |
| |
| EPILOGUE(mpn_udiv_qrnnd) |
