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libgcc2.c (__floatdisf, [...]): Don't use IBM Extended Double TFmode.

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* libgcc2.c (__floatdisf, __floatdidf): Don't use IBM Extended
	Double TFmode.
	(__floatundisf, __floatundidf): Likewise.
	* libgcc2.h (IS_IBM_EXTENDED): Define.

From-SVN: r110004
This commit is contained in:
Alan Modra 2006-01-20 00:42:29 +00:00 committed by Alan Modra
parent e9a8eb89de
commit b04c90638b
3 changed files with 31 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2006-01-20 Alan Modra <amodra@bigpond.net.au>
* libgcc2.c (__floatdisf, __floatdidf): Don't use IBM Extended
Double TFmode.
(__floatundisf, __floatundidf): Likewise.
* libgcc2.h (IS_IBM_EXTENDED): Define.
2006-01-19 DJ Delorie <dj@redhat.com>
* config/m32c/m32c.h (REG_ALLOC_ORDER): Define.

18
gcc/libgcc2.c
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@ -1371,7 +1371,14 @@ __floatunditf (UDWtype u)
#if (defined(L_floatdisf) && LIBGCC2_HAS_SF_MODE) \
|| (defined(L_floatdidf) && LIBGCC2_HAS_DF_MODE)
#define DI_SIZE (W_TYPE_SIZE * 2)
#define F_MODE_OK(SIZE) (SIZE < DI_SIZE && SIZE > (DI_SIZE - SIZE + FSSIZE))
#define F_MODE_OK(SIZE) \
(SIZE < DI_SIZE \
&& SIZE > (DI_SIZE - SIZE + FSSIZE) \
/* Don't use IBM Extended Double TFmode for TI->SF calculations. \
The conversion from long double to float suffers from double \
rounding, because we convert via double. In any case, the \
fallback code is faster. */ \
&& !IS_IBM_EXTENDED (SIZE))
#if defined(L_floatdisf)
#define FUNC __floatdisf
#define FSTYPE SFtype
@ -1476,7 +1483,14 @@ FUNC (DWtype u)
#if (defined(L_floatundisf) && LIBGCC2_HAS_SF_MODE) \
|| (defined(L_floatundidf) && LIBGCC2_HAS_DF_MODE)
#define DI_SIZE (W_TYPE_SIZE * 2)
#define F_MODE_OK(SIZE) (SIZE < DI_SIZE && SIZE > (DI_SIZE - SIZE + FSSIZE))
#define F_MODE_OK(SIZE) \
(SIZE < DI_SIZE \
&& SIZE > (DI_SIZE - SIZE + FSSIZE) \
/* Don't use IBM Extended Double TFmode for TI->SF calculations. \
The conversion from long double to float suffers from double \
rounding, because we convert via double. In any case, the \
fallback code is faster. */ \
&& !IS_IBM_EXTENDED (SIZE))
#if defined(L_floatundisf)
#define FUNC __floatundisf
#define FSTYPE SFtype

8
gcc/libgcc2.h
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@ -117,6 +117,14 @@ extern short int __get_eh_table_version (struct exception_descriptor *);
#endif
#endif
/* FIXME: This #ifdef probably should be removed, ie. enable the test
for mips too. */
#ifdef __powerpc__
#define IS_IBM_EXTENDED(SIZE) (SIZE == 106)
#else
#define IS_IBM_EXTENDED(SIZE) 0
#endif
#ifndef MIN_UNITS_PER_WORD
#define MIN_UNITS_PER_WORD UNITS_PER_WORD
#endif