X86: Implement a shuffle media microop.
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1 changed files with 42 additions and 0 deletions
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@ -365,6 +365,48 @@ let {{
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FpDestReg.uqw = result;
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'''
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class shuffle(MediaOp):
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code = '''
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assert(srcSize == destSize);
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int size = srcSize;
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int sizeBits = size * 8;
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int items = sizeof(FloatRegBits) / size;
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int options;
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int optionBits;
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if (size == 8) {
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options = 2;
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optionBits = 1;
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} else {
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options = 4;
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optionBits = 2;
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}
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uint64_t result = 0;
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uint8_t sel = ext;
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for (int i = 0; i < items; i++) {
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uint64_t resBits;
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uint8_t lsel = sel & mask(optionBits);
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if (lsel * size >= sizeof(FloatRegBits)) {
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lsel -= options / 2;
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resBits = bits(FpSrcReg2.uqw,
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(lsel + 1) * sizeBits - 1,
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(lsel + 0) * sizeBits);
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} else {
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resBits = bits(FpSrcReg1.uqw,
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(lsel + 1) * sizeBits - 1,
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(lsel + 0) * sizeBits);
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}
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sel >>= optionBits;
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int hiIndex = (i + 1) * sizeBits - 1;
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int loIndex = (i + 0) * sizeBits;
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result = insertBits(result, hiIndex, loIndex, resBits);
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}
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FpDestReg.uqw = result;
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'''
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class Unpack(MediaOp):
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code = '''
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assert(srcSize == destSize);
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