struct gl_shine_tab *_tab = table; \
float f = (dp * (SHINE_TABLE_SIZE-1)); \
int k = (int) f; \
- if (k > SHINE_TABLE_SIZE-2) \
+ if (k < 0 /* gcc may cast an overflow float value to negative int value*/ \
+ || k > SHINE_TABLE_SIZE-2) \
result = (GLfloat) _mesa_pow( dp, _tab->shininess ); \
else \
result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]); \