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| author | Zack Weinberg <zack@codesourcery.com> | 2004-07-27 21:41:23 +0000 |
|---|---|---|
| committer | Zack Weinberg <zack@gcc.gnu.org> | 2004-07-27 21:41:23 +0000 |
| commit | 968a7562a63bfddeb3a2ff7bf89656dcb3b2e54b (patch) | |
| tree | 433666cc87179f827d77692faceeb4590690a580 /gcc/doc | |
| parent | 706aa09b357196d83285da3809289b7d7d4f49a2 (diff) | |
| download | gcc-968a7562a63bfddeb3a2ff7bf89656dcb3b2e54b.zip gcc-968a7562a63bfddeb3a2ff7bf89656dcb3b2e54b.tar.gz gcc-968a7562a63bfddeb3a2ff7bf89656dcb3b2e54b.tar.bz2 | |
libgcc2.c: Change all conditionals testing LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96 to == 80.
* libgcc2.c: Change all conditionals testing
LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96 to == 80.
* libgcc2.h: Likewise.
* config/i386/i386.c (ix86_init_mmx_sse_builtins): Set
TYPE_PRECISION of float80_type to 80.
* config/ia64/ia64.c (ia64_init_builtins): Set TYPE_PRECISION
of fpreg_type and float80_type to 80.
* config/i386/i386.h, config/ia64/ia64.h, config/m68k/m68k.h
* config/m68k/netbsd-elf.h:
Change LONG_DOUBLE_TYPE_SIZE and possibly LIBGCC2_LONG_DOUBLE_TYPE_SIZE
to evaluate to 80 whenever they would formerly have evaluated to 96.
* config/i386/sco5.h: Remove unnecessary redefinition of
LONG_DOUBLE_TYPE_SIZE.
* doc/rtl.texi: Clarify uses of XFmode and TFmode.
* config/i386/i386-modes.def: Use FRACTIONAL_FLOAT_MODE for
XFmode, with a bitsize of 80. Update commentary.
* config/ia64/ia64-modes.def: Likewise.
* config/m68k/m68k-modes.def: Likewise.
From-SVN: r85232
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/rtl.texi | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 422f6d6..210e182 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -1100,15 +1100,16 @@ this is a double-precision IEEE floating point number. @findex XFmode @item XFmode -``Extended Floating'' mode represents a twelve byte floating point -number. This mode is used for IEEE extended floating point. On some -systems not all bits within these bytes will actually be used. +``Extended Floating'' mode represents an IEEE extended floating point +number. This mode only has 80 meaningful bits (ten bytes). Some +processors require such numbers to be padded to twelve bytes, others +to sixteen; this mode is used for either. @findex TFmode @item TFmode -``Tetra Floating'' mode represents a sixteen byte floating point number. -This gets used for both the 96-bit extended IEEE floating-point types -padded to 128 bits, and true 128-bit extended IEEE floating-point types. +``Tetra Floating'' mode represents a sixteen byte floating point number +all 128 of whose bits are meaningful. One common use is the +IEEE quad-precision format. @findex CCmode @item CCmode |