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[05/24] include/fpu/softfloat: implement float16_abs helper

Message ID 20180204041136.17525-6-richard.henderson@linaro.org
State New
Headers show
Series re-factor and add fp16 using glibc soft-fp | expand

Commit Message

Richard Henderson Feb. 4, 2018, 4:11 a.m. UTC 
From: Alex Bennée <alex.bennee@linaro.org>


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>

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

---
 include/fpu/softfloat.h | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.14.3
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Patch

diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index f3b9008f78..1d34f2c3eb 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -265,6 +265,13 @@  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.
 *----------------------------------------------------------------------------*/