* real.h (N): Special case 128 bit doubles.

From-SVN: r51229

* real.h (N): Special case 128 bit doubles.
From-SVN: r51229
bbaa9790 · Alan Modra · Alan Modra · ad42149c · bbaa9790 · bbaa9790
Commit bbaa9790 authored Mar 23, 2002 by Alan Modra Committed by Alan Modra Mar 23, 2002
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gcc/ChangeLog
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gcc/real.h
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 2002-03-23  Alan Modra  <amodra@bigpond.net.au>

+	* real.h (N): Special case 128 bit doubles.
+
 	* combine.c (simplify_comparison): When widening modes, ignore
 	sign extension on CONST_INTs.


--- a/gcc/real.h
+++ b/gcc/real.h
@@ -77,7 +77,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA

 /* REAL_VALUE_TYPE is an array of the minimum number of HOST_WIDE_INTs
   required to hold MAX_LONG_DOUBLE_TYPE_SIZE bits.  */
+#if MAX_LONG_DOUBLE_TYPE_SIZE == 128
+/* For 128 bit reals, we calculate internally with extra precision.  */
+#define N (160 / BITS_PER_UNIT)
+#else
 #define N (MAX_LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
+#endif
 #define S sizeof (HOST_WIDE_INT)
 typedef struct {
  HOST_WIDE_INT r[N/S + (N%S ? 1 : 0)]; /* round up */