FPU,SSE single floating point. Which is faster? sub or mul

FPU,SSE single floating point. Which is faster? sub or mul

Just tell me which one is faster: sub or mul?
My target platform is X86; FPU and SSE.
example:
'LerpColorSolution1' uses multiply.
'LerpColorSolution2' uses subtract.
which is faster ?
void LerpColorSolution1(const float* a, const float* b, float alpha,
float* out)
{
out[0] = a[0] + (b[0] - a[0]) * alpha;
out[1] = a[1] + (b[1] - a[1]) * alpha;
out[2] = a[2] + (b[2] - a[2]) * alpha;
out[3] = a[3] + (b[3] - a[3]) * alpha;
}
void LerpColorSolution2(const float* a, const float* b, float alpha,
float* out)
{
float f = 1.0f - alpha;
out[0] = a[0]*f + b[0] * alpha;
out[1] = a[1]*f + b[1] * alpha;
out[2] = a[2]*f + b[2] * alpha;
out[3] = a[3]*f + b[3] * alpha;
}
Thanks to all ;)