This will be required when expanding the MINMAX() macro for 16
bit/half-precision operations.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/fpu/softfloat.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 52af1412de..cfc615008d 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -347,6 +347,13 @@ static inline int float16_is_zero_or_denormal(float16 a)
     return (float16_val(a) & 0x7c00) == 0;
 }
 
+static inline float16 float16_abs(float16 a)
+{
+    /* Note that abs does *not* handle NaN specially, nor does
+     * it flush denormal inputs to zero.
+     */
+    return make_float16(float16_val(a) & 0x7fff);
+}
 /*----------------------------------------------------------------------------
 | The pattern for a default generated half-precision NaN.
 *----------------------------------------------------------------------------*/
-- 
2.15.1

On 9 January 2018 at 12:22, Alex Bennée <alex.bennee@linaro.org> wrote:
> This will be required when expanding the MINMAX() macro for 16
> bit/half-precision operations.
>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  include/fpu/softfloat.h | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
> index 52af1412de..cfc615008d 100644
> --- a/include/fpu/softfloat.h
> +++ b/include/fpu/softfloat.h
> @@ -347,6 +347,13 @@ static inline int float16_is_zero_or_denormal(float16 a)
>      return (float16_val(a) & 0x7c00) == 0;
>  }
>
> +static inline float16 float16_abs(float16 a)
> +{
> +    /* Note that abs does *not* handle NaN specially, nor does
> +     * it flush denormal inputs to zero.
> +     */
> +    return make_float16(float16_val(a) & 0x7fff);
> +}
>  /*----------------------------------------------------------------------------
>  | The pattern for a default generated half-precision NaN.
>  *----------------------------------------------------------------------------*/
> --
> 2.15.1

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM