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

gcc/ChangeLog

+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

gcc/emit-rtl.c

@@ -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

gcc/real.c

@@ -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