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Fix crash when function lookup tables are accessed with NaN

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Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Stefan Weil 2019-08-30 13:42:06 +02:00 committed by zdenop
parent 863a5b4232
commit e892cc272f
1 changed files with 2 additions and 2 deletions
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4
src/lstm/functions.h
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@ -74,7 +74,7 @@ extern const LUTTempl<kTableSize, LUTFuncLog> LogisticTable;
inline double Tanh(double x) {
if (x < 0.0) return -Tanh(-x);
x *= kScaleFactor;
int index = static_cast<int>(x);
unsigned index = static_cast<unsigned>(x);
if (index >= (kTableSize - 1)) return 1.0;
double tanh_i0 = TanhTable[index];
double tanh_i1 = TanhTable[index + 1];
@ -85,7 +85,7 @@ inline double Tanh(double x) {
inline double Logistic(double x) {
if (x < 0.0) return 1.0 - Logistic(-x);
x *= kScaleFactor;
int index = static_cast<int>(x);
unsigned index = static_cast<unsigned>(x);
if (index >= (kTableSize - 1)) return 1.0;
double l0 = LogisticTable[index];
double l1 = LogisticTable[index + 1];