wehub-resource-sync
18 lines
653 B
C++
18 lines
653 B
C++
#include <riscv_vector.h>
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void MNNRGBAToBGR(const unsigned char* source, unsigned char* dest, size_t count) {
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size_t i = 0;
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while (i < count) {
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size_t vl = __riscv_vsetvl_e8m8(count - i);
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vuint8m8_t channel = __riscv_vlse8_v_u8m8(source + 4 * i + 0, 4, vl);
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__riscv_vsse8_v_u8m8(dest + 3 * i + 2, 3, channel, vl);
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channel = __riscv_vlse8_v_u8m8(source + 4 * i + 1, 4, vl);
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__riscv_vsse8_v_u8m8(dest + 3 * i + 1, 3, channel, vl);
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channel = __riscv_vlse8_v_u8m8(source + 4 * i + 2, 4, vl);
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__riscv_vsse8_v_u8m8(dest + 3 * i + 0, 3, channel, vl);
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i += vl;
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}
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}
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