* only supports hann, hamming and all-one window
* inverse spectrogram does not support length parameter
* spectrogram always returns torch.view_as_real(out) as ncnn does not support complex typed mat yet
* inverse spectrogram always accepts torch.view_as_complex(in) as ncnn does not support complex typed mat yet

* x86 vulkan fallback
* comment about bf16s

* quantize gemm

* write gemm quantize scales

* update doc

* less openmp args

* x86 riscv fallback

* skip gemm vulkan int8

* fix noint8 test, fix arm bf16 test

* enable vfpv4 on neon build only

* fix gemm vulkan without C

* fp16 pack8 output

* enable elempack=8 only for asimdhp+

* tiled gemm int8 test

* opt arm64 tiles, fix asimdhp dispatch

* update swiftshader

* skip vs2017 swiftshader

`compute_queue_count` is a function.

modify the "bulid for macOS"

And fix a missing word.

Signed-off-by: hugo-syn <hugo.vincent@synacktiv.com>

Signed-off-by: hugo-syn <hugo.vincent@synacktiv.com>

plase -> please

Co-authored-by: Jeremy Rand <jeremyrand@danwin1210.de>

Co-authored-by: Jeremy Rand <jeremyrand@danwin1210.de>

Vulkan deps are optional. vulkan-utils is replaced with vulkan-tools
since Debian 10.

Co-authored-by: Jeremy Rand <jeremyrand@danwin1210.de>

Clang prior to 13 no longer fails to build ncnn since #4845.

Clang 18 fixes SSE4.1 translation, which yields a major speedup.

Co-authored-by: Jeremy Rand <jeremyrand@danwin1210.de>

* vulkan-driver-loader.md
* static vulkan on apple

* pnnx support grid_sample op

* complete the permute and gridsample operator fusion

* spilt calculation into two stages and support permute fusion

* Add POWER8 VSX toolchains

POWER8, though slower than POWER9, is still used in the wild; these
toolchains should still be much faster on POWER8 than POWER8 without VSX
optimizations.

* VSX toolchains: set -cpu arg in QEMU CI tests

* Add POWER9 VSX toolchains

Translating x86_64 SSE to ppc64le VSX intrinsics yields a quite large
speedup on POWER9. See this article for background:

https://www.talospace.com/2019/07/easier-power-vectorizing-for-fun-and.html

* Add power9le docs

* power9le clang toolchain: Document Clang 13+ requirement

---------

Co-authored-by: Jeremy Rand <jeremyrand@danwin1210.de>

* simplify binaryop

* less gpu test

* update binaryop broadcast doc

* do not test atan2 zero