Matt Pharr ccdbddd388 Add peephole optimization to match int8/int16 averages. ...

Match the following patterns in IR, turning them into target-specific
intrinsics (e.g. PAVGB on x86) when possible.

(unsigned int8)(((unsigned int16)a + (unsigned int16)b + 1)/2)
(unsigned int8)(((unsigned int16)a + (unsigned int16)b)/2)
(unsigned int16)(((unsigned int32)a + (unsigned int32)b + 1)/2)
(unsigned int16)(((unsigned int32)a + (unsigned int32)b)/2)
(int8)(((int16)a + (int16)b + 1)/2)
(int8)(((int16)a + (int16)b)/2)
(int16)(((int32)a + (int32)b + 1)/2)
(int16)(((int32)a + (int32)b)/2)

2013-08-06 08:59:46 -07:00

195 KiB

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