Intel® High Level Synthesis Compiler Standard Edition: Reference Manual

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ID 683310
Date 12/18/2019
Public
Document Table of Contents
Document Table of Contents x
1. Intel® HLS Compiler Standard Edition Reference Manual 2. Compiler 3. C Language and Library Support 4. Component Interfaces 5. Component Memories (Memory Attributes) 6. Loops in Components 7. Component Concurrency 8. Arbitrary Precision Math Support 9. Component Target Frequency 10. Intel® High Level Synthesis Compiler Standard Edition Compiler Reference Summary A. Supported Math Functions B. Intel® HLS Compiler Standard Edition Reference Manual Archives C. Document Revision History of the Intel® HLS Compiler Standard Edition Reference Manual
2. Compiler x
2.1. Intel® HLS Compiler Standard Edition Command Options 2.2. Using Libraries in Your Component 2.3. Compiler Interoperability 2.4. Intel® HLS Compiler Pipeline Approach
3. C Language and Library Support x
3.1. Supported C and C++ Subset for Component Synthesis 3.2. C and C++ Libraries 3.3. Intel® HLS Compiler Standard Edition Compiler-Defined Preprocessor Macros
4. Component Interfaces x
4.1. Component Invocation Interface 4.2. Avalon® Streaming Interfaces 4.3. Avalon® Memory-Mapped Master Interfaces 4.4. Slave Interfaces 4.5. Component Invocation Interface Arguments 4.6. Unstable and Stable Component Arguments 4.7. Global Variables 4.8. Structs in Component Interfaces 4.9. Reset Behavior
4.1. Component Invocation Interface x
4.1.1. Scalar Parameters 4.1.2. Pointer and Reference Parameters 4.1.3. Interface Definition Example: Component with Both Scalar and Pointer Arguments
4.3. Avalon® Memory-Mapped Master Interfaces x
4.3.1. Memory-Mapped Master Testbench Constructor 4.3.2. Implicit and Explicit Examples of Describing a Memory Interface
4.4. Slave Interfaces x
4.4.1. Control and Status Register (CSR) Slave 4.4.2. Slave Memories
5. Component Memories (Memory Attributes) x
5.1. Static Variables
6. Loops in Components x
6.1. Loop Initiation Interval (ii Pragma) 6.2. Loop-Carried Dependencies (ivdep Pragma) 6.3. Loop Coalescing (loop_coalesce Pragma) 6.4. Loop Concurrency (max_concurrency Pragma) 6.5. Loop Unrolling (unroll Pragma)
7. Component Concurrency x
7.1. Serial Equivalence within a Memory Space or I/O 7.2. Concurrency Control (hls_max_concurrency Attribute)
8. Arbitrary Precision Math Support x
8.1. Declaring ac_int Data Types 8.2. Integer Promotion and ac_int Data Types 8.3. Debugging Your Use of the ac_int Data Type 8.4. Declaring ac_fixed Data Types 8.5. AC Data Types and Native Compilers
8.1. Declaring ac_int Data Types x
8.1.1. Important Usage Information on the ac_int Data Type
10. Intel® High Level Synthesis Compiler Standard Edition Compiler Reference Summary x
10.1. Intel® HLS Compiler Standard Edition i++ Command-Line Arguments 10.2. Intel® HLS Compiler Standard Edition Header Files 10.3. Intel® HLS Compiler Standard Edition Compiler-Defined Preprocessor Macros 10.4. Intel® HLS Compiler Standard Edition Keywords 10.5. Intel® HLS Compiler Standard Edition Simulation API (Testbench Only) 10.6. Intel® HLS Compiler Standard Edition Component Memory Attributes 10.7. Intel® HLS Compiler Standard Edition Loop Pragmas 10.8. Intel® HLS Compiler Standard Edition Component Attributes 10.9. Intel® HLS Compiler Standard Edition Component Default Interfaces 10.10. Intel® HLS Compiler Standard Edition Component Invocation Interface Arguments 10.11. Intel® HLS Compiler Standard Edition Component Macros 10.12. Intel® HLS Compiler Standard Edition Streaming Input Interfaces 10.13. Intel® HLS Compiler Standard Edition Streaming Output Interfaces 10.14. Intel® HLS Compiler Standard Edition Memory-Mapped Interfaces 10.15. Intel® HLS Compiler Standard Edition Arbitrary Precision Data Types
A. Supported Math Functions x
A.1. Math Functions Provided by the math.h Header File A.2. Math Functions Provided by the extendedmath.h Header File A.3. Math Functions Provided by the ac_fixed_math.h Header File
1. Intel® HLS Compiler Standard Edition Reference Manual
2. Compiler
3. C Language and Library Support
4. Component Interfaces
5. Component Memories (Memory Attributes)
6. Loops in Components
7. Component Concurrency
8. Arbitrary Precision Math Support
9. Component Target Frequency
10. Intel® High Level Synthesis Compiler Standard Edition Compiler Reference Summary
A. Supported Math Functions
B. Intel® HLS Compiler Standard Edition Reference Manual Archives
C. Document Revision History of the Intel® HLS Compiler Standard Edition Reference Manual

A.1. Math Functions Provided by the math.h Header File

The Intel® HLS Compiler Standard Edition supports a subset of functions that are present in your native compiler through the HLS/math.h header file.

For each math.h function listed below, "●" indicates that the HLS compiler supports the function; "X" indicates that the function is not supported.

The math functions supported on Linux operating systems might differ from the math functions supported on Windows operating systems. Review the comments in the HLS/math.h header file to see which math functions are supported on the different operating systems.

Table 36.  Trigonometric Functions
Trigonometric Function Supported?
Double-precision floating point function Single-precision floating point function
cos cosf ●
sin sinf ●
tan tanf ●
acos acosf ●
asin asinf ●
atan atanf ●
atan2 atan2f ●
Table 37.  Hyperbolic Functions
Hyperbolic Function Supported?
Double-precision floating point function Single-precision floating point function
cosh coshf ●
sinh sinhf ●
tanh tanhf ●
acosh acoshf X
asinh asinhf X
atanh atanhf X
Table 38.  Exponential and Logarithmic Functions
Exponential or Logarithmic Function Supported?
Double-precision floating point function Single-precision floating point function
exp expf ●
frexp frexpf ●
ldexp ldexpf ●
log logf ●
log10 log10f ●
modf modff ●
exp2 exp2f ●
exp10 (Linux only) exp10f (Linux only)* X
expm1 expm1f ●
ilogb ilogbf X
log1p log1pf ●
log2 log2f ●
logb logbf X
scalbn scalbnf X
scalbln scalblnf ●
Table 39.  Power Functions
Power Function Supported?
Double-precision floating point function Single-precision floating point function
pow powf ●
sqrt sqrtf ●
cbrt cbrtf X
hypot hypotf X
Table 40.  Error and Gamma Functions
Error or Gamma Function Supported?
Double-precision floating point function Single-precision floating point function
erf erff X
erfc erfcf X
tgamma tgammaf X
lgamma lgammaf X
lgamma_r (Linux only)2 lgamma_rf (Linux only)2 X
Table 41.  Rounding and Remainder Functions
Rounding or Remainder Function Supported?
Double-precision floating point function Single-precision floating point function
ceil ceilf ●
floor floorf ●
fmod fmodf ●
trunc truncf ●
round roundf ●
lround lroundf X
llround llroundf X
rint rintf ●
lrint lrintf X
llrint llrintf X
nearbyint nearbyintf X
remainder remainderf X
remquo remquof X
Table 42.  Floating-Point Manipulation Functions
Floating-Point Manipulation Function Supported?
Double-precision floating point function Single-precision floating point function
copysign copysignf X
nan nanf X
nextafter nextafterf X
nexttoward nexttowardf X
Table 43.  Minimum, Maximum, and Difference Functions
Minimum, Maximum, or Difference Function Supported?
Double-precision floating point function Single-precision floating point function
fdim fdim ●
fmax fmax ●
fmin fmin ●
Table 44.  Other Functions
Function Supported?
Double-precision floating point function Single-precision floating point function
fabs fabsf ●
fma fmaf X
Table 45.  Classification Macros
Classification Macro Supported?
Double-precision floating point function Single-precision floating point function
fpclassify (Linux only) fpclassifyf (Linux only) X
isfinite isfinitef ●
isinf isinff ●
isnan isnanf ●
isnormal (Linux only) isnormalf (Linux only) X
signbit (Linux only) signbitf (Linux only) X
Table 46.  Comparison Macros
Comparison Macro Supported?
Double-precision floating point function Single-precision floating point function
isgreater isgreaterf X
isgreaterequal isgreaterequalf X
isless islessf X
islessequal islessequalf X
islessgreater islessgreaterf X
isunordered (Linux only) isunorderedf (Linux only) X
* For Windows, support for this function is in the extendedmath.h header file
* For Windows, support for this function is in the extendedmath.h header file
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