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C–2 Alpha Architecture Handbook
Table C–2: Common Architecture Instructions
Mnemonic Format Opcode Description
ADDF F-P 15.080 Add F_floating
ADDG F-P 15.0A0 Add G_floating
ADDL Opr 10.00 Add longword
ADDL/V 10.40
ADDQ Opr 10.20 Add quadword
ADDQ/V 10.60
ADDS F-P 16.080 Add S_floating
ADDT F-P 16.0A0 Add T_floating
AMASK Opr 11.61 Architecture mask
AND Opr 11.00 Logical product
BEQ Bra 39 Branch if = zero
BGE Bra 3E Branch if ≥ zero
BGT Bra 3F Branch if > zero
BIC Opr 11.08 Bit clear
BIS Opr 11.20 Logical sum
BLBC Bra 38 Branch if low bit clear
BLBS Bra 3C Branch if low bit set
BLE Bra 3B Branch if ≤ zero
BLT Bra 3A Branch if < zero
BNE Bra 3D
Branch if
≠
zero
BR Bra 30 Unconditional branch
BSR Mbr 34 Branch to subroutine
CALL_PAL Pcd 00 Trap to PALcode
CMOVEQ Opr 11.24 CMOVE if = zero
CMOVGE Opr 11.46 CMOVE if ≥ zero
CMOVGT Opr 11.66 CMOVE if > zero
CMOVLBC Opr 11.16 CMOVE if low bit clear
CMOVLBS Opr 11.14 CMOVE if low bit set
CMOVLE Opr 11.64 CMOVE if ≤ zero
CMOVLT Opr 11.44 CMOVE if < zero
CMOVNE Opr 11.26
CMOVE if
≠
zero
CMPBGE Opr 10.0F Compare byte
CMPEQ Opr 10.2D Compare signed quadword equal
CMPGEQ F-P 15.0A5 Compare G_floating equal
CMPGLE F-P 15.0A7 Compare G_floating less than or equal
CMPGLT F-P 15.0A6 Compare G_floating less than
CMPLE Opr 10.6D Compare signed quadword less than or equal
CMPLT Opr 10.4D Compare signed quadword less than
CMPTEQ F-P 16.0A5 Compare T_floating equal
CMPTLE F-P 16.0A7 Compare T_floating less than or equal
CMPTLT F-P 16.0A6 Compare T_floating less than
CMPTUN F-P 16.0A4 Compare T_floating unordered
CMPULE Opr 10.3D Compare unsigned quadword less than or equal
CMPULT Opr 10.1D Compare unsigned quadword less than
CPYS F-P 17.020 Copy sign
CPYSE F-P 17.022 Copy sign and exponent
CPYSN F-P 17.021 Copy sign negate
CTLZ Opr 1C.32 Count leading zero
CTPOP Opr 1C.30 Count population
CTTZ Opr 1C.33 Count trailing zero
CVTDG F-P 15.09E Convert D_floating to G_floating
CVTGD F-P 15.0AD Convert G_floating to D_floating
CVTGF F-P 15.0AC Convert G_floating to F_floating