Yexuan Wu

ncnn是否考虑支持权重量化 Does ncnn consider supporting weight quantization

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## detail | 详细描述 | 詳細な説明 权重量化能够大幅度减小模型体积，对移动端或者网页较为友好。ncnn是否有支持的计划。

fix _mm256_extract_epi64 in msvc2015 and old winsdk

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as far as i know, there is no _mm256_extract_epi64 in msvc2015 and old winsdk. so i impl it by hand. ```cpp static inline uint64_t _mm256_extract_epi64_fork(__m256i a, const int index) {...

spir-v fastmath mode

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As op absval Before ``` ; SPIR-V ; Version: 1.3 ; Generator: Khronos Glslang Reference Front End; 11 ; Bound: 54 ; Schema: 0 OpCapability Shader %1 = OpExtInstImport "GLSL.std.450"...

persistent vulkan pipeline cache

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- [x] 文件级缓存Pipeline - [x] 验证平台信息等 - [x] 缓存spv 性能表现： CPU: 13900HX GPU: 对应核心显卡 ``` ================================================== Verification and Summary ================================================== Output verification: SUCCESS -------------------------------------------------- Performance Summary: - Without Cache: 423.934...

httpjpg for windows

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test on windows10 & msvc 2022 and wsl(ubuntu) & gcc