The following functions are provided in the HLS math library. Each
function supports half-precision (type half),
single-precision (type float) and double precision
(type double).
Important: For each
function func listed below, there is also an
associated half-precision only function named half_func and single-precision only function named funcf provided in the library.
When mixing half-precision, single-precision and double-precision
data types, check for common synthesis errors to prevent introducing type-conversion
hardware in the final FPGA implementation.
Trigonometric Functions
| acos |
acospi |
asin |
asinpi |
| atan |
atan2 |
atan2pi |
cos |
| cospi |
sin |
sincos |
sinpi |
| tan |
tanpi |
|
|
Hyperbolic Functions
| acosh |
asinh |
atanh |
cosh |
| sinh |
tanh |
|
|
Exponential Functions
| exp |
exp10 |
exp2 |
expm1 |
| frexp |
ldexp |
modf |
|
Power Functions
| cbrt |
hypot |
pow |
rsqrt |
| sqrt |
|
|
|
Rounding Functions
| ceil |
floor |
llrint |
llround |
| lrint |
lround |
nearbyint |
rint |
| round |
trunc |
|
|
Floating-point
| copysign |
nan |
nextafter |
nexttoward |
Difference Functions
| fdim |
fmax |
fmin |
maxmag |
| minmag |
|
|
|
Important:
Vitis HLS does not
support Technical Specification 18661-1 sNaN handling in
fmin/fmax yet, This can lead to result
differences when compared with glibc 2.25 and later results.
Other Functions
| abs |
divide |
fabs |
fma |
| fract |
mad |
recip |
|
Classification Functions
| fpclassify |
isfinite |
isinf |
isnan |
| isnormal |
signbit |
|
|
Comparison Functions
| isgreater |
isgreaterequal |
isless |
islessequal |
| islessgreater |
isunordered |
|
|
Relational Functions
| all |
any |
bitselect |
isequal |
| isnotequal |
isordered |
select |
|