The following table offers a definition of some of the operators used in HLS compiler. Standard llvm instruction can be found here: https://llvm.org/docs/LangRef.html#instruction-reference
| Name | Description |
|---|---|
| FSqrt | Compute the square root of float |
| FRSqrt | Compute the reciprocal of square root of float |
| FRecip | Compute the reciprocal of float |
| FLog | Compute the Logarithmic of float |
| FExp | Compute the exponential of float |
| DSqrt | Compute the square root of double |
| DRSqrt | Compute the reciprocal of square root of double |
| DRecip | Compute the reciprocal of double |
| DLog | Compute the Logarithmic of double |
| DExp | Compute the exponential of double |
| BlackBox | Instantiate a blackbox function |
| BitSelect | Select a single bit of a variable |
| BitSet | Set a single bit of a variable |
| PartSelect | Select a range of bits of a variable |
| PartSet | Set a range of bits of a variable |
| BitConcatenate | Concatenate two variables |
| XorReduce | Compute XOR reduce of a variable defined by xor_reduce() in ap_(u)int types |
| XnorReduce | Compute XNOR reduce of a variable defined by xnor_reduce() in ap_(u)int types |
| AndReduce | Compute AND reduce of a variable defined by and_reduce() in ap_(u)int types |
| NandReduce | Compute NAND reduce of a variable defined by nand_reduce() in ap_(u)int types |
| OrReduce | Compute OR reduce of a variable defined by or_reduce() in ap_(u)int types |
| NorReduce | Compute NOR reduce of a variable defined by nor_reduce() in ap_(u)int types |
| Read | Read a value from an interface |
| Write | Write a value to an interface |
| NbRead | Non-block read a value from an interface |
| NbWrite | non-block write a value to an interface |
| ReadReq | Send a read request to a bus. Only available for m_axi. |
| WriteReq | Send a write request to a bus. Only available for m_axi. |
| WriteResp | Receive a write respond from a bus. Only for m_axi. |
| MemShiftRead | Shift the registers of SRL primitive |
| Mux | Select a value from multiple values |