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(simplify_unary_operation): Correctly and consistently handle 

CONST_INT cases for FLOAT and UNSIGNED_FLOAT.

From-SVN: r7470
This commit is contained in:
Richard Kenner 1994-06-14 17:53:33 -04:00
parent ac7157f6c9
commit 62c0ea12e9
1 changed files with 34 additions and 37 deletions
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71
gcc/cse.c
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@ -2886,70 +2886,67 @@ simplify_unary_operation (code, mode, op, op_mode)
check the wrong mode (input vs. output) for a conversion operation,
such as FIX. At some point, this should be simplified. */
#if !defined (REAL_IS_NOT_DOUBLE) || defined (REAL_ARITHMETIC)
if (code == FLOAT && GET_CODE (op) == CONST_INT)
#if !defined(REAL_IS_NOT_DOUBLE) || defined(REAL_ARITHMETIC)
if (code == FLOAT && GET_MODE (op) == VOIDmode
&& (GET_CODE (op) == CONST_DOUBLE || GET_CODE (op) == CONST_INT))
{
HOST_WIDE_INT hv, lv;
REAL_VALUE_TYPE d;
#ifdef REAL_ARITHMETIC
REAL_VALUE_FROM_INT (d, INTVAL (op), INTVAL (op) < 0 ? ~0 : 0);
#else
d = (double) INTVAL (op);
#endif
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
else if (code == UNSIGNED_FLOAT && GET_CODE (op) == CONST_INT)
{
REAL_VALUE_TYPE d;
if (GET_CODE (op) == CONST_INT)
lv = INTVAL (op), hv = INTVAL (op) < 0 ? -1 : 0;
else
lv = CONST_DOUBLE_HIGH (op), hv = CONST_DOUBLE_LOW (op);
#ifdef REAL_ARITHMETIC
REAL_VALUE_FROM_INT (d, INTVAL (op), 0);
REAL_VALUE_FROM_INT (d, lv, hv);
#else
d = (double) (unsigned int) INTVAL (op);
#endif
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
else if (code == FLOAT && GET_CODE (op) == CONST_DOUBLE
&& GET_MODE (op) == VOIDmode)
{
REAL_VALUE_TYPE d;
#ifdef REAL_ARITHMETIC
REAL_VALUE_FROM_INT (d, CONST_DOUBLE_LOW (op), CONST_DOUBLE_HIGH (op));
#else
if (CONST_DOUBLE_HIGH (op) < 0)
if (hv < 0)
{
d = (double) (~ CONST_DOUBLE_HIGH (op));
d = (double) (~ hv);
d *= ((double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2))
* (double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2)));
d += (double) (unsigned HOST_WIDE_INT) (~ CONST_DOUBLE_LOW (op));
d += (double) (unsigned HOST_WIDE_INT) (~ lv);
d = (- d - 1.0);
}
else
{
d = (double) CONST_DOUBLE_HIGH (op);
d = (double) hv;
d *= ((double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2))
* (double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2)));
d += (double) (unsigned HOST_WIDE_INT) CONST_DOUBLE_LOW (op);
d += (double) (unsigned HOST_WIDE_INT) lv;
}
#endif /* REAL_ARITHMETIC */
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
else if (code == UNSIGNED_FLOAT && GET_CODE (op) == CONST_DOUBLE
&& GET_MODE (op) == VOIDmode)
else if (code == UNSIGNED_FLOAT && GET_MODE (op) == VOIDmode
&& (GET_CODE (op) == CONST_DOUBLE || GET_CODE (op) == CONST_INT))
{
HOST_WIDE_INT hv, lv;
REAL_VALUE_TYPE d;
if (GET_CODE (op) == CONST_INT)
lv = INTVAL (op), hv = INTVAL (op) < 0 ? -1 : 0;
else
lv = CONST_DOUBLE_HIGH (op), hv = CONST_DOUBLE_LOW (op);
if (GET_MODE_BITSIZE (op_mode) >= HOST_BITS_PER_WIDE_INT * 2)
;
else
hv = 0, lv &= GET_MODE_MASK (op_mode);
#ifdef REAL_ARITHMETIC
REAL_VALUE_FROM_UNSIGNED_INT (d, CONST_DOUBLE_LOW (op),
CONST_DOUBLE_HIGH (op));
REAL_VALUE_FROM_UNSIGNED_INT (d, lv, hv);
#else
d = (double) CONST_DOUBLE_HIGH (op);
d = (double) hv;
d *= ((double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2))
* (double) ((HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT / 2)));
d += (double) (unsigned HOST_WIDE_INT) CONST_DOUBLE_LOW (op);
d += (double) (unsigned HOST_WIDE_INT) lv;
#endif /* REAL_ARITHMETIC */
return CONST_DOUBLE_FROM_REAL_VALUE (d, mode);
}
#endif