WavePrefixMax

Description

WavePrefixMax - Exclusive prefix maximum (equivalent to GLSL subgroupExclusiveMax) Returns the maximum of all values from lanes with a lower index. Lane 0 gets the identity value (type min), lane i gets max(val[0], …, val[i-1]).

Signature

T WavePrefixMax<T>(T expr)
    where T : __BuiltinArithmeticType;

vector<T, N> WavePrefixMax<T, int N>(vector<T, N> expr)
    where T : __BuiltinArithmeticType;

matrix<T, N, M> WavePrefixMax<T, int N, int M>(matrix<T, N, M> expr)
    where T : __BuiltinArithmeticType;

Generic Parameters

T: __BuiltinArithmeticType

N : int

M : int

Parameters

expr : T

expr : vector<T, N>

expr : matrix<T, N, M>

Availability and Requirements

Defined for the following targets:

glsl

Available in all stages.

cuda

Available in all stages.

spirv

Available in all stages.

Requires capability: spvGroupNonUniformArithmetic.