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A–4 Alpha Instruction Set
21264/EV68A Hardware Reference Manual
Alpha Instruction Summary
CVTGQ F-P 15.0AF Convert G_floating to quadword
CVTLQ F-P 17.010 Convert longword to quadword
CVTQF F-P 15.0BC Convert quadword to F_floating
CVTQG F-P 15.0BE Convert quadword to G_floating
CVTQL F-P 17.030 Convert quadword to longword
CVTQS F-P 16.0BC Convert quadword to S_floating
CVTQT F-P 16.0BE Convert quadword to T_floating
CVTST F-P 16.2AC Convert S_floating to T_floating
CVTTQ F-P 16.0AF Convert T_floating to quadword
CVTTS F-P 16.0AC Convert T_floating to S_floating
DIVF F-P 15.083 Divide F_floating
DIVG F-P 15.0A3 Divide G_floating
DIVS F-P 16.083 Divide S_floating
DIVT F-P 16.0A3 Divide T_floating
ECB Mfc 18.E800 Evict cache block
EQV Opr 11.48 Logical equivalence
EXCB Mfc 18.0400 Exception barrier
EXTBL Opr 12.06 Extract byte low
EXTLH Opr 12.6A Extract longword high
EXTLL Opr 12.26 Extract longword low
EXTQH Opr 12.7A Extract quadword high
EXTQL Opr 12.36 Extract quadword low
EXTWH Opr 12.5A Extract word high
EXTWL Opr 12.16 Extract word low
FBEQ Bra 31 Floating branch if = zero
FBGE Bra 36 Floating branch if ≥ zero
FBGT Bra 37 Floating branch if > zero
FBLE Bra 33 Floating branch if ≤ zero
FBLT Bra 32 Floating branch if < zero
FBNE Bra 35
Floating branch if
≠
zero
FCMOVEQ F-P 17.02A FCMOVE if = zero
FCMOVGE F-P 17.02D FCMOVE if ≥ zero
Table A–2 Architecture Instructions (Continued)
Mnemonic Format Opcode Description