Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpn/pa64/udiv.asm b/third_party/gmp/mpn/pa64/udiv.asm
new file mode 100644
index 0000000..1380a85
--- /dev/null
+++ b/third_party/gmp/mpn/pa64/udiv.asm
@@ -0,0 +1,125 @@
+dnl HP-PA 2.0 64-bit mpn_udiv_qrnnd_r.
+
+dnl Copyright 2001-2003 Free Software Foundation, Inc.
+
+dnl This file is part of the GNU MP Library.
+dnl
+dnl The GNU MP Library is free software; you can redistribute it and/or modify
+dnl it under the terms of either:
+dnl
+dnl * the GNU Lesser General Public License as published by the Free
+dnl Software Foundation; either version 3 of the License, or (at your
+dnl option) any later version.
+dnl
+dnl or
+dnl
+dnl * the GNU General Public License as published by the Free Software
+dnl Foundation; either version 2 of the License, or (at your option) any
+dnl later version.
+dnl
+dnl or both in parallel, as here.
+dnl
+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 General Public License
+dnl for more details.
+dnl
+dnl You should have received copies of the GNU General Public License and the
+dnl GNU Lesser General Public License along with the GNU MP Library. If not,
+dnl see https://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C This runs at about 280 cycles on both PA8000 and PA8500, corresponding to a
+C bit more than 4 cycles/bit.
+
+C INPUT PARAMETERS
+define(`n1',`%r26')
+define(`n0',`%r25')
+define(`d',`%r24')
+define(`remptr',`%r23')
+
+define(`q',`%r28')
+define(`dn',`%r29')
+
+define(`old_divstep',
+ `add,dc n0,n0,n0
+ add,dc n1,n1,n1
+ sub,*<< n1,d,%r22
+ copy %r22,n1')
+
+define(`divstep',
+ `add n0,n0,n0
+ add,dc n1,n1,n1
+ sub n1,d,%r1
+ add,dc q,q,q
+ cmpclr,*<< n1,d,%r0
+ copy %r1,n1
+')
+
+ifdef(`HAVE_ABI_2_0w',
+` .level 2.0w
+',` .level 2.0
+')
+PROLOGUE(mpn_udiv_qrnnd_r)
+ifdef(`HAVE_ABI_2_0n',
+` depd %r25,31,32,%r26
+ depd %r23,31,32,%r24
+ copy %r24,%r25
+ ldd -56(%r30),%r24
+ ldw -60(%r30),%r23
+')
+ ldi 0,q
+ cmpib,*>= 0,d,L(large_divisor)
+ ldi 8,%r31 C setup loop counter
+
+ sub %r0,d,dn
+LDEF(Loop)
+ divstep divstep divstep divstep divstep divstep divstep divstep
+ addib,<> -1,%r31,L(Loop)
+ nop
+
+ifdef(`HAVE_ABI_2_0n',
+` copy %r28,%r29
+ extrd,u %r28,31,32,%r28
+')
+ bve (%r2)
+ std n1,0(remptr) C store remainder
+
+LDEF(large_divisor)
+ extrd,u n0,63,1,%r19 C save lsb of dividend
+ shrpd n1,n0,1,n0 C n0 = lo(n1n0 >> 1)
+ shrpd %r0,n1,1,n1 C n1 = hi(n1n0 >> 1)
+ extrd,u d,63,1,%r20 C save lsb of divisor
+ shrpd %r0,d,1,d C d = floor(orig_d / 2)
+ add,l %r20,d,d C d = ceil(orig_d / 2)
+
+ sub %r0,d,dn
+LDEF(Loop2)
+ divstep divstep divstep divstep divstep divstep divstep divstep
+ addib,<> -1,%r31,L(Loop2)
+ nop
+
+ cmpib,*= 0,%r20,L(even_divisor)
+ shladd n1,1,%r19,n1 C shift in omitted dividend lsb
+
+ add d,d,d C restore orig...
+ sub d,%r20,d C ...d value
+ sub %r0,d,dn C r21 = -d
+
+ add,*nuv n1,q,n1 C fix remainder for omitted divisor lsb
+ add,l n1,dn,n1 C adjust remainder if rem. fix carried
+ add,dc %r0,q,q C adjust quotient accordingly
+
+ sub,*<< n1,d,%r0 C remainder >= divisor?
+ add,l n1,dn,n1 C adjust remainder
+ add,dc %r0,q,q C adjust quotient
+
+LDEF(even_divisor)
+ifdef(`HAVE_ABI_2_0n',
+` copy %r28,%r29
+ extrd,u %r28,31,32,%r28
+')
+ bve (%r2)
+ std n1,0(remptr) C store remainder
+EPILOGUE(mpn_udiv_qrnnd_r)