diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 2b07c09..ea0c42b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -18421,9 +18421,9 @@ subroutines. Code size is smaller. @opindex mdouble @opindex mlong-double Set the size (in bits) of the @code{double} or @code{long double} type, -respectively. Possible values for @var{bits} are 32 an 64. +respectively. Possible values for @var{bits} are 32 and 64. Whether or not a specific value for @var{bits} is allowed depends on -the @code{--with--double=} and @code{--with-long-double=} +the @code{--with-double=} and @code{--with-long-double=} @w{@uref{https://gcc.gnu.org/install/configure.html#avr,configure options}}, and the same applies for the default values of the options. @@ -18886,6 +18886,36 @@ features like attribute @code{progmem} and @code{pgm_read_*}. The compiler is configured to be used together with AVR-Libc. See the @option{--with-avrlibc} configure option. +@item __HAVE_DOUBLE_MULTILIB__ +Defined if @option{-mdouble=} acts as a multilib option. + +@item __HAVE_DOUBLE32__ +@itemx __HAVE_DOUBLE64__ +Defined if the compiler supports 32-bit double resp. 64-bit double. +The actual layout is specified by option @option{-mdouble=}. + +@item __DEFAULT_DOUBLE__ +The size in bits of @code{double} if @option{-mdouble=} is not set. +To test the layout of @code{double} in a program, use the built-in +macro @code{__SIZEOF_DOUBLE__}. + +@item __HAVE_LONG_DOUBLE32__ +@itemx __HAVE_LONG_DOUBLE64__ +@itemx __HAVE_LONG_DOUBLE_MULTILIB__ +@itemx __DEFAULT_LONG_DOUBLE__ +Same as above, but for @code{long double} instead of @code{double}. + +@item __WITH_DOUBLE_COMPARISON__ +Reflects the @code{--with-double-comparison=@{tristate|bool|libf7@}} +@w{@uref{https://gcc.gnu.org/install/configure.html#avr,configure option}} +and is defined to @code{2} or @code{3}. + +@item __WITH_LIBF7_LIBGCC__ +@itemx __WITH_LIBF7_MATH__ +@itemx __WITH_LIBF7_MATH_SYMBOLS__ +Reflects the @code{--with-libf7=@{libgcc|math|math-symbols@}} +@w{@uref{https://gcc.gnu.org/install/configure.html#avr,configure option}}. + @end table @node Blackfin Options |