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[PULL,06/22] include/fpu/softfloat: implement float16_chs helper

Message ID 20180221110523.859-7-alex.bennee@linaro.org
State New
Headers show
Series re-factor softfloat and add fp16 functions | expand

Commit Message

Alex Bennée Feb. 21, 2018, 11:05 a.m. UTC 
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

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


-- 
2.15.1
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Patch

diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 1d34f2c3eb..f75aa59100 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -272,6 +272,15 @@  static inline float16 float16_abs(float16 a)
      */
     return make_float16(float16_val(a) & 0x7fff);
 }
+
+static inline float16 float16_chs(float16 a)
+{
+    /* Note that chs does *not* handle NaN specially, nor does
+     * it flush denormal inputs to zero.
+     */
+    return make_float16(float16_val(a) ^ 0x8000);
+}
+
 /*----------------------------------------------------------------------------
 | The pattern for a default generated half-precision NaN.
 *----------------------------------------------------------------------------*/