spread_transpose16_symbol()

FASTLED_FORCE_INLINE FL_IRAM FL_OPTIMIZE_FUNCTION void fl::detail::spread_transpose16_symbol	(	const u8	l[16],
		u8	out[16] )

Transpose one symbol of 16 lanes (16 input bytes) into 16 output bytes: 8 pulses × 2 bytes, low byte = lanes 0-7, high byte = lanes 8-15, pulse order 7..0 (out[0] = pulse 7 low).

Matches the naive layout.

Definition at line 43 of file bit_spread_lut.hpp.

                                                           {
    const u32 aLo = spreadA(l[0]) | spreadA(l[1]) << 1 | spreadA(l[2]) << 2 | spreadA(l[3]) << 3 |
                    spreadA(l[4]) << 4 | spreadA(l[5]) << 5 | spreadA(l[6]) << 6 | spreadA(l[7]) << 7;
    const u32 bLo = spreadB(l[0]) | spreadB(l[1]) << 1 | spreadB(l[2]) << 2 | spreadB(l[3]) << 3 |
                    spreadB(l[4]) << 4 | spreadB(l[5]) << 5 | spreadB(l[6]) << 6 | spreadB(l[7]) << 7;
    const u32 aHi = spreadA(l[8]) | spreadA(l[9]) << 1 | spreadA(l[10]) << 2 | spreadA(l[11]) << 3 |
                    spreadA(l[12]) << 4 | spreadA(l[13]) << 5 | spreadA(l[14]) << 6 | spreadA(l[15]) << 7;
    const u32 bHi = spreadB(l[8]) | spreadB(l[9]) << 1 | spreadB(l[10]) << 2 | spreadB(l[11]) << 3 |
                    spreadB(l[12]) << 4 | spreadB(l[13]) << 5 | spreadB(l[14]) << 6 | spreadB(l[15]) << 7;
    out[0] = static_cast<u8>(aLo);        out[1] = static_cast<u8>(aHi);
    out[2] = static_cast<u8>(aLo >> 8);   out[3] = static_cast<u8>(aHi >> 8);
    out[4] = static_cast<u8>(aLo >> 16);  out[5] = static_cast<u8>(aHi >> 16);
    out[6] = static_cast<u8>(aLo >> 24);  out[7] = static_cast<u8>(aHi >> 24);
    out[8] = static_cast<u8>(bLo);        out[9] = static_cast<u8>(bHi);
    out[10] = static_cast<u8>(bLo >> 8);  out[11] = static_cast<u8>(bHi >> 8);
    out[12] = static_cast<u8>(bLo >> 16); out[13] = static_cast<u8>(bHi >> 16);
    out[14] = static_cast<u8>(bLo >> 24); out[15] = static_cast<u8>(bHi >> 24);
}

References spreadA(), and spreadB().

Referenced by wave3_transpose_16(), wave8_transpose_16(), wave8_transpose_16_bf1(), wave8_transpose_16x2_pipe2(), wave8_transpose_16x4_bf1_pipe4(), and wave8_transpose_16x4_pipe4().

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