On Wed, Oct 25, 2017 at 11:41:24PM +0000, Joseph Myers wrote:
> My only comment on this version is that the documentation in cpp.texi of
> __FP_FAST_* should be updated to mention __FP_FAST_FMAF@var{n} and
> __FP_FAST_FMAF@var{n}X.
Here is the documentation to be added to the previoius patch. With this
change, can I check it into the trunk (once Segher approves of the minor bit to
take out the PowerPC __builtin_{sqrtf128,fmaf128} builtins.
2017-10-25 Michael Meissner <[email protected]>
* doc/cpp.texi (Common Predefined Macros): Document defining
__FP_FAST_FMAF<N> and __FP_FAST_FMAF<N>X if the back supports fma
_Float<N> and _Float<N>X variants.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: [email protected], phone: +1 (978) 899-4797
Index: gcc/doc/cpp.texi
===================================================================
--- gcc/doc/cpp.texi (revision 254080)
+++ gcc/doc/cpp.texi (working copy)
@@ -2366,6 +2366,21 @@ the include file @file{math.h} can defin
@code{FP_FAST_FMA}, @code{FP_FAST_FMAF}, and @code{FP_FAST_FMAL}
for compatibility with the 1999 C standard.
+@item __FP_FAST_FMAF16
+@itemx __FP_FAST_FMAF32
+@itemx __FP_FAST_FMAF64
+@itemx __FP_FAST_FMAF128
+@itemx __FP_FAST_FMAF32X
+@itemx __FP_FAST_FMAF64X
+@itemx __FP_FAST_FMAF128X
+These macros are defined with the value 1 if the backend supports the
+@code{fma} functions using the additional @code{_Float@var{n}} and
+@code{_Float@var{n}x} types that are defined in ISO/IEC TS
+18661-3:2015. The include file @file{math.h} can define the
+@code{FP_FAST_FMAF@var{n}} and @code{FP_FAST_FMAF@var{n}x} macros if
+the user defined @code{__STDC_WANT_IEC_60559_TYPES_EXT__} before
+including @file{math.h}.
+
@item __GCC_IEC_559
This macro is defined to indicate the intended level of support for
IEEE 754 (IEC 60559) floating-point arithmetic. It expands to a
