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fpu/softfloat: improve comments on ARM NaN propagation

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Mention the pseudo-code fragment from which this is based.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Alex Bennée 2017-07-19 11:49:42 +01:00
parent efd4829edf
commit 13894527f5
1 changed files with 3 additions and 2 deletions
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5
fpu/softfloat-specialize.h
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@ -445,9 +445,10 @@ static float32 commonNaNToFloat32(commonNaNT a, float_status *status)
#if defined(TARGET_ARM)
static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
flag aIsLargerSignificand)
flag aIsLargerSignificand)
{
/* ARM mandated NaN propagation rules: take the first of:
/* ARM mandated NaN propagation rules (see FPProcessNaNs()), take
* the first of:
* 1. A if it is signaling
* 2. B if it is signaling
* 3. A (quiet)