VSRW V1, V2, V3                 // 10611284
	VSRD V1, V2, V3                 // 106116c4
	VSR V1, V2, V3                  // 106112c4
	VSRO V1, V2, V3                 // 1061144c
	VSLD V1, V2, V3                 // 106115c4
	VSRAB V1, V2, V3                // 10611304
	VSRAH V1, V2, V3                // 10611344
	VSRAW V1, V2, V3                // 10611384
	VSRAD V1, V2, V3                // 106113c4

(Rsh8Ux(64|32|16|8)  x y) && shiftIsBounded(v) => (SRD (MOVBZreg x) y)
(Rsh64x(64|32|16|8)  x y) && shiftIsBounded(v) => (SRAD x y)
(Rsh32x(64|32|16|8)  x y) && shiftIsBounded(v) => (SRAW x y)
(Rsh16x(64|32|16|8)  x y) && shiftIsBounded(v) => (SRAD (MOVHreg x) y)
(Rsh8x(64|32|16|8)   x y) && shiftIsBounded(v) => (SRAD (MOVBreg x) y)

// Unbounded shifts. Go shifts saturate to 0 or -1 when shifting beyond the number of

(S(LD|RD|RAD|LW|RW|RAW) x (ANDWconst [c] y)) && c&63 == 63
  => (S(LD|RD|RAD|LW|RW|RAW) x y)
(SLD  x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SLD  x y)
(SRD  x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRD  x y)
(SRAD x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRAD x y)
(SLW  x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SLW  x y)
(SRW  x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRW  x y)
(SRAW x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRAW x y)

// Match rotate by constant.