[PATCH v2] Minimal support for ISO/IEC TS 18661-3.

[Corinna Vinschen]

On Jul 12 17:17, Kito Cheng wrote:
>  - GCC will set __FLT_EVAL_METHOD__ to 16 if __fp16 supported, e.g.
>    cortex-a55/aarch64.
>    - $ aarch64-unknown-elf-gcc -v 2>&1 |grep version
>      gcc version 9.2.0 (GCC)
>    - $ aarch64-unknown-elf-gcc  -E -dM -mcpu=cortex-a55 - < /dev/null  |grep FLT_EVAL_METHOD
>      #define __FLT_EVAL_METHOD__ 16
>      #define __FLT_EVAL_METHOD_TS_18661_3__ 16
>      #define __FLT_EVAL_METHOD_C99__ 16
>  - The behavior of __FLT_EVAL_METHOD__ == 16 is same as
>    __FLT_EVAL_METHOD__ == 0 except for float16_t, but newlib didn't
>    support float16_t.
> 
> ISO/IEC TS 18661-3:
> http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2405.pdf
> 
> V2 Changes:
> - List Howland, Craig D as co-author since he provide the draft of comment
>   in math.h.
> 
> Co-authored-by: "Howland, Craig D" <howland@LGSInnovations.com>
> ---
>  newlib/libc/include/math.h | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)

Pushed.


Thanks,
Corinna