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authorUlrich Drepper <drepper@redhat.com>2007-06-08 02:50:59 +0000
committerUlrich Drepper <drepper@redhat.com>2007-06-08 02:50:59 +0000
commit835abc5c0dfd1ba8aabeb52d46793b13702c708b (patch)
tree8863a99b99c334da2e2fe77459acca76dbac5ef0 /sysdeps/i386
parent43b768284325b7e7d2ec3fc3dcac13a35c378c95 (diff)
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[BZ #4586]
2007-06-06 Jakub Jelinek <jakub@redhat.com> BZ #4586 * sysdeps/i386/ldbl2mpn.c (__mpn_extract_long_double): Treat pseudo-zeros as zero. * sysdeps/x86_64/ldbl2mpn.c: New file. * sysdeps/ia64/ldbl2mpn.c: New file.
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/ldbl2mpn.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/sysdeps/i386/ldbl2mpn.c b/sysdeps/i386/ldbl2mpn.c
index bf4e4ff..01be777 100644
--- a/sysdeps/i386/ldbl2mpn.c
+++ b/sysdeps/i386/ldbl2mpn.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1995, 1996, 1997, 2000, 2007 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
@@ -19,7 +19,7 @@
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
-#include "ieee754.h"
+#include <ieee754.h>
#include <float.h>
#include <stdlib.h>
@@ -46,7 +46,7 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
#elif BITS_PER_MP_LIMB == 64
/* Hopefully the compiler will combine the two bitfield extracts
and this composition into just the original quadword extract. */
- res_ptr[0] = ((unsigned long int) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
+ res_ptr[0] = ((mp_limb_t) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
#define N 1
#else
#error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
@@ -109,6 +109,13 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
}
}
}
+ else if (u.ieee.exponent < 0x7fff
+#if N == 2
+ && res_ptr[0] == 0
+#endif
+ && res_ptr[N - 1] == 0)
+ /* Pseudo zero. */
+ *expt = 0;
return N;
}