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authorKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:38 +0900
committerKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:38 +0900
commitf5660c6460a863b19f9ef745575780e37cc192a9 (patch)
tree0b478679da32d706de7b0de546d2e4daf03b160c /mpi/hppa1.1/udiv-qrnnd.S
parent06b9124a4f9d38acc78e6af686bc49a06f6354f8 (diff)
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+/* HP-PA __udiv_qrnnd division support, used from longlong.h.
+ * This version runs fast on PA 7000 and later.
+ *
+ * Copyright (C) 1993, 1994, 1998,
+ * 2001 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ * Actually it's the same code with only minor changes in the
+ * way the data is stored; this is to support the abstraction
+ * of an optional secure memory allocation which may be used
+ * to avoid revealing of sensitive data due to paging etc.
+ * The GNU MP Library itself is published under the LGPL;
+ * however I decided to publish this code under the plain GPL.
+ */
+
+
+
+/* INPUT PARAMETERS
+ * rem_ptr gr26
+ * n1 gr25
+ * n0 gr24
+ * d gr23
+ */
+
+ .code
+ .align 8
+ .label L$0000
+ .word 0x43f00000
+ .word 0x0
+ .export __udiv_qrnnd
+ .label __udiv_qrnnd
+ .proc
+ .callinfo frame=64,no_calls
+ .entry
+ ldo 64(%r30),%r30
+
+ stws %r25,-16(0,%r30) ; n_hi
+ stws %r24,-12(0,%r30) ; n_lo
+ ldil L'L$0000,%r19 ; '
+ ldo R'L$0000(%r19),%r19 ; '
+ fldds -16(0,%r30),%fr5
+ stws %r23,-12(0,%r30)
+ comib,<= 0,%r25,L$1
+ fcnvxf,dbl,dbl %fr5,%fr5
+ fldds 0(0,%r19),%fr4
+ fadd,dbl %fr4,%fr5,%fr5
+ .label L$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,%r19
+ comib,= 0,%r19,L$2
+ ldo -64(%r30),%r30
+
+ add %r22,%r23,%r22
+ ldo -1(%r28),%r28
+ .label L$2
+ bv 0(%r2)
+ stws %r22,0(0,%r26)
+
+ .exit
+ .procend
+
+