mirror of https://github.com/bsnes-emu/bsnes.git
37 lines
792 B
C++
Executable File
37 lines
792 B
C++
Executable File
#pragma once
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//matrix multiplication primitives
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//used in: ruby/opengl/quark
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namespace nall {
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template<typename T> inline auto MatrixMultiply(
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T* output,
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const T* xdata, uint xrows, uint xcols,
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const T* ydata, uint yrows, uint ycols
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) -> void {
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if(xcols != yrows) return;
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for(uint y : range(xrows)) {
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for(uint x : range(ycols)) {
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T sum = 0;
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for(uint z : range(xcols)) {
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sum += xdata[y * xcols + z] * ydata[z * ycols + x];
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}
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*output++ = sum;
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}
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}
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}
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template<typename T> inline auto MatrixMultiply(
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const T* xdata, uint xrows, uint xcols,
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const T* ydata, uint yrows, uint ycols
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) -> vector<T> {
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vector<T> output;
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output.resize(xrows * ycols);
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MatrixMultiply(output.data(), xdata, xrows, xcols, ydata, yrows, ycols);
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return output;
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}
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}
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