wehub-resource-sync
33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
#include <riscv_vector.h>
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void MNNUnpackC4(float* dst, const float* src, size_t area, size_t depth, int* areaOffset) {
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const size_t srcAreaStride = (size_t)areaOffset[0];
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const size_t dstAreaStride = (size_t)areaOffset[1];
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const ptrdiff_t srcStrideBytes = 4 * (ptrdiff_t)sizeof(float);
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const size_t depthC4 = (depth + 3) / 4;
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for (size_t z = 0; z < depthC4; ++z) {
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const size_t cBase = z * 4;
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const float* srcZ = src + z * srcAreaStride * 4;
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size_t valid = depth - cBase;
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if (valid > 4) {
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valid = 4;
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}
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for (size_t y = 0; y < valid; ++y) {
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const float* srcChannel = srcZ + y;
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float* dstChannel = dst + (cBase + y) * dstAreaStride;
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size_t x = 0;
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while (x < area) {
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const size_t vl = __riscv_vsetvl_e32m8(area - x);
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vfloat32m8_t v = __riscv_vlse32_v_f32m8(srcChannel + 4 * x, srcStrideBytes, vl);
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__riscv_vse32_v_f32m8(dstChannel + x, v, vl);
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x += vl;
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}
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}
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}
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}
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