如何在金属着色语言中定义结构字段类型？

Question

不清楚如何定义struct字段的ref或ptr类型？

struct uint128_t {
    uint64_t lo;
    uint64_t hi;
    
    device uint64_t& operator[](int i) {
        return (i == 0) ? lo : hi;
    }

    ...
}

Reference to type 'device uint64_t' (aka 'device unsigned long') could not bind to an lvalue of type 'uint64_t' (aka 'unsigned long')

Answer 1

您需要为函数本身指定地址 space。否则，你不能使用 address-space 特定的东西。

正确的定义如下：


struct uint128_t {
    uint64_t lo;
    uint64_t hi;

    device uint64_t& operator[](int i) device {
        return (i == 0) ? lo : hi;
    }
};

如何在金属着色语言中定义结构字段类型？

How to define struct field type in Metal Shading Language?

c++

metal