types.md

Types

SPIR-V has a type system in order to define any type of variable. All types start with the OpType prefix. Types can be stacked on each other to build more complex types

Example - Mat3x2

In order to define a 3x2 matrix of 32-bit floats, the following SPIR-V can be used.

%float       = OpTypeFloat 32
%v2float     = OpTypeVector %float 2
%mat3v2float = OpTypeMatrix %v2float 3

Example - Structs

To define the following struct

struct myStruct {
    int   a;
    float b;
    int   c;
}

the base types are defined and then ordered in the struct type.

%int = OpTypeInt 32 1
%float = OpTypeFloat 32
%myStruct = OpTypeStruct %int %float %int