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4–26 Alpha Architecture Handbook
4.4.2 Scaled Longword Add
Format:
Operation:
CASE
S4ADDL: Rc ← SEXT (((LEFT_SHIFT(Rav,2)) + Rbv)<31:0>)
S8ADDL: Rc ← SEXT (((LEFT_SHIFT(Rav,3)) + Rbv)<31:0>)
ENDCASE
Exceptions:
Instruction mnemonics:
Qualifiers:
Description:
Register Ra is scaled by 4 (for S4ADDL) or 8 (for S8ADDL) and is added to register Rb or a
literal, and the sign-extended 32-bit sum is written to Rc.
The high 32 bits of Ra and Rb are ignored. Rc is a proper sign extension of the truncated 32-bit
sum.
SxADDL Ra.rl,Rb.rq,Rc.wq !Operate format
SxADDL Ra.rl,#b.ib,Rc.wq !Operate format
None
S4ADDL Scaled Add Longword by 4
S8ADDL Scaled Add Longword by 8
None