__kernel_cosf
case 2: y = __kernel_cosf(pi*((float)0.5-y),zero); break;
case 6: y = -__kernel_cosf(pi*(y-(float)1.5),zero); break;
extern float __kernel_cosf(float,float);
return __kernel_cosf(x,z);
case 0: return __kernel_cosf(y[0],y[1]);
case 2: return -__kernel_cosf(y[0],y[1]);
c = __kernel_cosf(y[0], y[1]);
case 1: return __kernel_cosf(y[0],y[1]);
return -__kernel_cosf(y[0],y[1]);