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Jakub Jelinek <jj@ultra.linux.cz> 

Jakub Jelinek  <jj@ultra.linux.cz>
        * real.c (ereal_from_double): Fix for 64-bit big endian hosts.
        * emit-rtl.c (gen_lowpart_common): Add case for hosts where double
        fits in HOST_WIDE_INT and one uses union to access a long constant
        as double.

From-SVN: r27675
This commit is contained in:
Jakub Jelinek 1999-06-21 19:52:47 +02:00 committed by Richard Henderson
parent 2be15d0fe6
commit 8fc4af0f11
3 changed files with 28 additions and 3 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
1999-06-21 Jakub Jelinek <jj@ultra.linux.cz>
* real.c (ereal_from_double): Fix for 64-bit big endian hosts.
* emit-rtl.c (gen_lowpart_common): Add case for hosts where double
fits in HOST_WIDE_INT and one uses union to access a long constant
as double.
Mon Jun 21 17:18:25 1999 Richard Henderson <rth@cygnus.com>
* sparc.c (sparc_override_options): Don't allow profiling for

16
gcc/emit-rtl.c
View File

@ -896,6 +896,22 @@ gen_lowpart_common (mode, x)
r = REAL_VALUE_FROM_TARGET_SINGLE (i);
return CONST_DOUBLE_FROM_REAL_VALUE (r, mode);
}
else if (((HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
&& HOST_BITS_PER_WIDE_INT == BITS_PER_WORD)
|| flag_pretend_float)
&& GET_MODE_CLASS (mode) == MODE_FLOAT
&& GET_MODE_SIZE (mode) == UNITS_PER_WORD
&& GET_CODE (x) == CONST_INT
&& (sizeof (double) * HOST_BITS_PER_CHAR
== HOST_BITS_PER_WIDE_INT))
{
REAL_VALUE_TYPE r;
HOST_WIDE_INT i;
i = INTVAL (x);
r = REAL_VALUE_FROM_TARGET_DOUBLE (&i);
return CONST_DOUBLE_FROM_REAL_VALUE (r, mode);
}
#endif
/* Similarly, if this is converting a floating-point value into a

8
gcc/real.c
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@ -6400,17 +6400,19 @@ ereal_from_double (d)
/* Convert array of HOST_WIDE_INT to equivalent array of 16-bit pieces. */
if (REAL_WORDS_BIG_ENDIAN)
{
#if HOST_BITS_PER_WIDE_INT == 32
s[0] = (unsigned EMUSHORT) (d[0] >> 16);
s[1] = (unsigned EMUSHORT) d[0];
#if HOST_BITS_PER_WIDE_INT == 32
s[2] = (unsigned EMUSHORT) (d[1] >> 16);
s[3] = (unsigned EMUSHORT) d[1];
#else
/* In this case the entire target double is contained in the
first array element. The second element of the input is
ignored. */
s[2] = (unsigned EMUSHORT) (d[0] >> 48);
s[3] = (unsigned EMUSHORT) (d[0] >> 32);
s[0] = (unsigned EMUSHORT) (d[0] >> 48);
s[1] = (unsigned EMUSHORT) (d[0] >> 32);
s[2] = (unsigned EMUSHORT) (d[0] >> 16);
s[3] = (unsigned EMUSHORT) d[0];
#endif
}
else