Mon Jul 6 22:14:31 1998 Richard Henderson (rth@cygnus.com)
+ * print-rtl.c (print_rtx): Display the real-value equivalent of
+ a const_double when easy.
+
+ * real.h (REAL_VALUE_TO_TARGET_SINGLE): Use a union to pun types.
+ Zero memory first for predictability.
+ (REAL_VALUE_TO_TARGET_DOUBLE): Likewise.
+ * varasm.c (immed_real_const_1): Notice width of H_W_I == double.
+
* regclass.c (allocate_reg_info): Initialize the entire reg_data
virtual array.
#include "system.h"
#include "rtl.h"
#include "bitmap.h"
+#include "real.h"
/* How to print out a register name.
abort ();
}
+#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
+ if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
+ {
+ double val;
+ REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
+ fprintf (outfile, " [%.16g]", val);
+ }
+#endif
+
fprintf (outfile, ")");
sawclose = 1;
}
value in host format and then to a single type `long' value which
is the bitwise equivalent of the `float' value. */
#ifndef REAL_VALUE_TO_TARGET_SINGLE
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
-do { float f = (float) (IN); \
- (OUT) = *(long *) &f; \
- } while (0)
+#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
+do { \
+ union { \
+ float f; \
+ HOST_WIDE_INT l; \
+ } u; \
+ if (sizeof(HOST_WIDE_INT) < sizeof(float)) \
+ abort(); \
+ u.l = 0; \
+ u.f = (IN); \
+ (OUT) = u.l; \
+} while (0)
#endif
/* Convert a type `double' value in host format to a pair of type `long'
proper word order for the target. */
#ifndef REAL_VALUE_TO_TARGET_DOUBLE
#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
-do { REAL_VALUE_TYPE in = (IN); /* Make sure it's not in a register. */\
- if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \
- { \
- (OUT)[0] = ((long *) &in)[0]; \
- (OUT)[1] = ((long *) &in)[1]; \
- } \
- else \
- { \
- (OUT)[1] = ((long *) &in)[0]; \
- (OUT)[0] = ((long *) &in)[1]; \
- } \
- } while (0)
+do { \
+ union { \
+ REAL_VALUE_TYPE f; \
+ HOST_WIDE_INT l[2]; \
+ } u; \
+ if (sizeof(HOST_WIDE_INT) * 2 < sizeof(REAL_VALUE_TYPE)) \
+ abort(); \
+ u.l[0] = u.l[1] = 0; \
+ u.f = (IN); \
+ if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \
+ (OUT)[0] = u.l[0], (OUT)[1] = u.l[1]; \
+ else \
+ (OUT)[1] = u.l[0], (OUT)[0] = u.l[1]; \
+} while (0)
#endif
#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
else if (! REAL_VALUE_ISNAN (d) && REAL_VALUES_EQUAL (dconst1, d))
return CONST1_RTX (mode);
+ if (sizeof u == sizeof (HOST_WIDE_INT))
+ return immed_double_const (u.i[0], 0, mode);
if (sizeof u == 2 * sizeof (HOST_WIDE_INT))
return immed_double_const (u.i[0], u.i[1], mode);