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Yi Luo authored
- In SSSE3 optimization, 16-bit addition and subtraction would overflow when input coefficient is 16-bit signed extreme values. - Function-level speed becomes slower (unit ms): idct8x8_64: 284 -> 294 idct8x8_12: 145 -> 158. BUG=webm:1332 Change-Id: I1e4bf9d30a6d4112b8cac5823729565bf145e40b
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