X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=gmp%2Fmpz%2Ffdiv_qr.c;fp=gmp%2Fmpz%2Ffdiv_qr.c;h=0230db1725d32757674045f29209e9dff33be618;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git

diff --git a/gmp/mpz/fdiv_qr.c b/gmp/mpz/fdiv_qr.c
new file mode 100644
index 00000000..0230db17
--- /dev/null
+++ b/gmp/mpz/fdiv_qr.c
@@ -0,0 +1,54 @@
+/* mpz_fdiv_qr -- Division rounding the quotient towards -infinity.
+   The remainder gets the same sign as the denominator.
+
+Copyright 1994, 1995, 1996, 2000, 2001, 2005 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 3 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.  If not, see http://www.gnu.org/licenses/.  */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+mpz_fdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor)
+{
+  mp_size_t divisor_size = divisor->_mp_size;
+  mp_size_t xsize;
+  mpz_t temp_divisor;		/* N.B.: lives until function returns! */
+  TMP_DECL;
+
+  TMP_MARK;
+
+  /* We need the original value of the divisor after the quotient and
+     remainder have been preliminary calculated.  We have to copy it to
+     temporary space if it's the same variable as either QUOT or REM.  */
+  if (quot == divisor || rem == divisor)
+    {
+      MPZ_TMP_INIT (temp_divisor, ABS (divisor_size));
+      mpz_set (temp_divisor, divisor);
+      divisor = temp_divisor;
+    }
+
+  xsize = dividend->_mp_size ^ divisor_size;;
+  mpz_tdiv_qr (quot, rem, dividend, divisor);
+
+  if (xsize < 0 && rem->_mp_size != 0)
+    {
+      mpz_sub_ui (quot, quot, 1L);
+      mpz_add (rem, rem, divisor);
+    }
+
+  TMP_FREE;
+}