Complex Operations
The table below lists the costs for standard single-precision, floating-point
functions. For OpenCL, it assumes the -cl-fast-relaxed-math compilation flag.
A low cost represents less than 30 hardware instructions, and a high cost represents more than 100 instructions. 30 to 100 instructions is considered a medium cost.
| Function | Cost |
|---|---|
x+y | Low |
x*y | Low |
x/y | Low |
1/x | Low |
rsqrt(x), 1/sqrt(x) | Low |
sqrt(x) | Low |
cbrt(x) | Low |
hypot(x) | Medium |
exp(x) | Medium |
exp2(x) | Low |
exp10(x) | Medium |
expml(x) | Medium |
log(x) | Low |
log2(x) | Low |
log10(x) | Low |
loglp(x) | High |
sin(x) | Low |
cos(x) | Low |
tan(x) | High |
sincos(x, cptr) | Medium |
asin(x) | Medium |
acos(x) | Medium |
atan(x) | Low |
atan2(y,x) | Medium |
sinh(x) | Medium |
cosh(x) | Medium |
tanh(x) | Medium |
asinh(x) | High |
acosh(x) | High |
atanh(x) | High |
pow(x,y) | High |
fma(x,y,z) | Low |
frexp(x,exp) | Low |
ldexp(x,exp) | Medium |
logb(x) | Low |
ilogb(x) | Low |
fmod(x,y) | Medium |
remainder(x,y) | High |
remquo(x,y,iptr) | High |
modf(x,iptr) | Low |
fdim(x,y) | Low |
trunc(x) | Low |
round(x) | Low |
rint(x) | Low |
ceil(x) | Low |
floor(x) | Low |
asinpi(x) | Medium |
acospi(x) | Medium |
atanpi(x) | Low |
atan2pi(x,y) | Medium |
copysign(x,y) | Low |
sinpi(x) | Medium |
cospi(x) | Medium |
tanpi(x) | Medium |
fabs(x) | Low |
fmax(x,y) | Low |
fmin(x,y) | Low |
fract(x,ptr) | Low |
hypot(x,y) | Medium |
ldexp(x,y) | Medium |
mad(x,y,z) | Low |
maxmag(x,y) | Low |
minmag(x,y) | Low |
nan(x) | Low |
nextafter(x,y) | Low |
powr(x,y) | High |
pown(x,y) | High |
rootn(x,y) | High |
signbit(x) | Low |