1999-08-27 13:27 -0700 Zack Weinberg <zack@bitmover.com>

	* rtl.c: Define CONST_DOUBLE_FORMAT to the appropriate format
	for a CONST_DOUBLE, at compile time.  Initialize rtx_length
	and class_narrowest_mode at compile time.  Kill init_rtl.
	Mark rtx_length, mode_class, mode_size, mode_unit_size,
	mode_wider_mode, mode_mask_array, class_narrowest_mode, and
	rtx_format as const.  Kill all references to EXTRA_CC_MODES or
	EXTRA_CC_NAMES.
	* rtl.def (CONST_DOUBLE): Use CONST_DOUBLE_FORMAT macro for
	format.
	* rtl.h: Declare rtx_length and rtx_format as const.
	* machmode.def: Define CC().  Use CC() to define CCmode.  If
	EXTRA_CC_MODES is defined, expand it here.
	* machmode.h: Declare mode_class, mode_size, mode_unit_size,
	mode_wider_mode, mode_mask_array, and class_narrowest_mode as
	const.  Kill all references to EXTRA_CC_MODES.

	* toplev.c: Don't prototype or call init_rtl.
	* optabs.c: Don't call init_mov_optab.
	* genemit.c: Don't generate init_mov_optab.  Don't call
	init_rtl.
	* gengenrtl.c: Duplicate calculation of CONST_DOUBLE_FORMAT
	here.
	* genattr.c, genattrtab.c, gencodes.c, genconfig.c,
	genextract.c, genflags.c, genopinit.c, genoutput.c, genpeep.c,
	genrecog.c: Don't call init_rtl.

	* arc.h, arm.h, c4x.h, i386.h, i960.h, m88k.h, pa.h, pdp11.h,
	rs6000.h, sparc.h: Don't define EXTRA_CC_NAMES.  Use CC() in
	definition of EXTRA_CC_MODES.

	* md.texi: Kill ref to EXTRA_CC_NAMES.
	* tm.texi: Document new way to define EXTRA_CC_MODES.

	* genrecog.c: Do not look up the name of a define_split.
	(Unrelated bugfix.)


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@28937 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 21 insertions, 0 deletions

diff --git a/gcc/gengenrtl.c b/gcc/gengenrtl.c
index e07b9402c88..762c96fa4e4 100644
--- a/gcc/gengenrtl.c
+++ b/gcc/gengenrtl.c
@@ -26,6 +26,27 @@ Boston, MA 02111-1307, USA.  */
 #include "rtl.h"
 #undef abort
 
+#include "real.h"
+
+/* Calculate the format for CONST_DOUBLE.  This depends on the relative
+   widths of HOST_WIDE_INT and REAL_VALUE_TYPE.
+   We only need to go out to e0wwww, since min(HOST_WIDE_INT)==32 and
+   max(LONG_DOUBLE_TYPE_SIZE)==128.
+   This is duplicated in rtl.c.  
+   A number of places assume that there are always at least two 'w'
+   slots in a CONST_DOUBLE, so we provide them even if one would suffice.  */
+#if HOST_BITS_PER_WIDE_INT >= LONG_DOUBLE_TYPE_SIZE
+#define CONST_DOUBLE_FORMAT	"e0ww"
+#elif HOST_BITS_PER_WIDE_INT*2 >= LONG_DOUBLE_TYPE_SIZE
+#define CONST_DOUBLE_FORMAT	"e0ww"
+#elif HOST_BITS_PER_WIDE_INT*3 >= LONG_DOUBLE_TYPE_SIZE
+#define CONST_DOUBLE_FORMAT	"e0www"
+#elif HOST_BITS_PER_WIDE_INT*4 >= LONG_DOUBLE_TYPE_SIZE
+#define CONST_DOUBLE_FORMAT	"e0wwww"
+#else
+#define CONST_DOUBLE_FORMAT	/* nothing - will cause syntax error */
+#endif
+
 
 struct rtx_definition 
 {