Fvec Syntax and Notation
This reference uses the following conventions for syntax and return values.
Fvec Classes Syntax Notation
Fvec classes use one of the following the syntax conventions, where
- [operator]is an operator (for example,&, |, or ^)
- [Fvec_Class]is anyFvecclass (F64vec2,F32vec4, orF32vec1)
- R,A,Bare declaredFvecvariables of the type indicated
Syntax Convention One
Syntax:
[Fvec_Class] R = [Fvec_Class] A [operator][Ivec_Class] B;
Example:
F64vec2 R = F64vec2 A & F64vec2 B;
Syntax Convention Two
Syntax:
[Fvec_Class] R = [operator]([Fvec_Class] A,[Fvec_Class] B);
Example:
F64vec2 R = andnot(F64vec2 A, F64vec2 B);
Syntax Convention Three
Syntax:
[Fvec_Class] R [operator]= [Fvec_Class] A;
Example:
F64vec2 R &= F64vec2 A;
Return Value Notation
Because the
Fvec
classes have packed elements, the return values typically follow the conventions presented in the following table.
F32vec4
returns four single-precision, floating-point values (R0, R1, R2, and R3);
F64vec2
returns two double-precision, floating-point values, and
F32vec1
returns the lowest single-precision floating-point value (R0).
Syntax Convention One Example
| Syntax Convention Two Example
| Syntax Convention Three Example
| F32vec4
| F64vec2
| F32vec1
|
|---|---|---|---|---|---|
R0 := A0 & B0; | R0 := A0 andnot B0; | R0 &= A0; | x
| x
| x
|
R1 := A1 & B1; | R1 := A1 andnot B1; | R1 &= A1; | x
| x
| N/A
|
R2 := A2 & B2; | R2 := A2 andnot B2; | R2 &= A2; | x
| N/A
| N/A
|
R3 := A3 & B3 | R3 := A3 andhot B3; | R3 &= A3; | x
| N/A
| N/A
|