Cortex™-A8 Technical Reference ManualRevision: r1p1
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16.2.5. Extended instructions

The extended instructions include the following base instruction types:

XTAB, XTAH, XTB, XTH.

Table 16.6 shows the operation of extended instructions.

Table 16.6. Extended instructions

Shift typeCyclesSource1Source2Source3Source4Result1Result2
Versions without accumulate[1]1Rm:E1[Rd:E2]--Rd:E1/E2-
Versions with accumulate1Rm:E1Rn:E2[Rd:E2]-Rd:E2-

[1] If conditional, result is not available until E2.

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