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real.c: Allow sizeof (REAL_VALUE_TYPE) > 2*NE.

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2002-04-19  Andreas Schwab  <schwab@suse.de>

        * real.c: Allow sizeof (REAL_VALUE_TYPE) > 2*NE.
        (PUT_REAL): Restore old definition.

From-SVN: r52527
This commit is contained in:
Andreas Schwab 2002-04-19 17:12:59 +00:00 committed by David Edelsohn
parent 1405141bc5
commit 62a12b2795
2 changed files with 17 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-04-19 Andreas Schwab <schwab@suse.de>
* real.c: Allow sizeof (REAL_VALUE_TYPE) > 2*NE.
(PUT_REAL): Restore old definition.
2002-04-19 Dan Nicolaescu <dann@godzilla.ics.uci.edu>
Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>

17
gcc/real.c
View File

@ -209,7 +209,7 @@ typedef unsigned int UHItype __attribute__ ((mode (HI)));
#endif
/* Calculate the size of the generic "e" type. This always has
identical in-memory size and representation to REAL_VALUE_TYPE.
identical in-memory size to REAL_VALUE_TYPE.
There are only two supported sizes: ten and six 16-bit words (160
or 96 bits). */
@ -224,11 +224,13 @@ typedef unsigned int UHItype __attribute__ ((mode (HI)));
# define MINDECEXP -4956
#endif
/* Fail compilation if 2*NE is not the appropriate size. */
/* Fail compilation if 2*NE is not the appropriate size.
If HOST_BITS_PER_WIDE_INT is 64, we're going to have padding
at the end of the array, because neither 96 nor 160 is
evenly divisible by 64. */
struct compile_test_dummy {
char twice_NE_must_equal_sizeof_REAL_VALUE_TYPE
[(sizeof (REAL_VALUE_TYPE) == 2*NE) ? 1 : -1];
[(sizeof (REAL_VALUE_TYPE) >= 2*NE) ? 1 : -1];
};
/* Construct macros to translate between REAL_VALUE_TYPE and e type.
@ -236,7 +238,12 @@ struct compile_test_dummy {
A REAL_VALUE_TYPE is guaranteed to occupy contiguous locations
in memory, with no holes. */
#define GET_REAL(r, e) memcpy ((e), (r), 2*NE)
#define PUT_REAL(e, r) memcpy ((r), (e), 2*NE)
#define PUT_REAL(e, r) \
do { \
memcpy (r, e, 2*NE); \
if (2*NE < sizeof (*r)) \
memset ((char *) (r) + 2*NE, 0, sizeof (*r) - 2*NE); \
} while (0)
/* Number of 16 bit words in internal format */
#define NI (NE+3)