wave8_expand_byte()

FASTLED_FORCE_INLINE FL_IRAM FL_OPTIMIZE_FUNCTION void fl::detail::wave8_expand_byte	(	u8	byte_value,
		const Wave8ByteExpansionLut &	lut,
		Wave8Byte *	output )

Byte-indexed expansion (#2526): one indexed 8-byte copy.

Single lookup (no >>4/mask, no second index) into the 256×8 byte LUT; bit-identical to wave8_convert_byte_to_wave8byte(). ~half the index/issue work for the same memory traffic — the win on the in-order RV32 core.

Definition at line 69 of file wave8.hpp.

                                          {
    isr::memcpy_32(fl::bit_cast_ptr<u32>(output),
                  fl::bit_cast_ptr<const u32>(&lut.lut[byte_value]),
                  2); // 8 bytes = 2 x uint32_t
}

References fl::bit_cast_ptr(), and fl::isr::memcpy_32().

Referenced by fl::wave8Transpose_16(), fl::wave8Transpose_16x2_pipe2(), fl::wave8Transpose_16x4_pipe4(), fl::wave8Transpose_2(), fl::wave8Transpose_4(), and fl::wave8Transpose_8().

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