Compaq 21264 User Manual
Page 273
Alpha 21264/EV67 Hardware Reference Manual
Alpha Instruction Set
A–7
Alpha Instruction Summary
PKWB
Opr
1C.36
Pack words to bytes
RC
Mfc
18.E000 Read and clear
RET
Mbr
1A.2
Return from subroutine
RPCC
Mfc
18.C000 Read process cycle counter
RS
Mfc
18.F000 Read and set
S4ADDL
Opr
10.02
Scaled add longword by 4
S4ADDQ
Opr
10.22
Scaled add quadword by 4
S4SUBL
Opr
10.0B
Scaled subtract longword by 4
S4SUBQ
Opr
10.2B
Scaled subtract quadword by 4
S8ADDL
Opr
10.12
Scaled add longword by 8
S8ADDQ
Opr
10.32
Scaled add quadword by 8
S8SUBL
Opr
10.1B
Scaled subtract longword by 8
S8SUBQ
Opr
10.3B
Scaled subtract quadword by 8
SEXTB
Opr
1C.00
Sign extend byte
SEXTW
Opr
1C.01
Sign extend word
SLL
Opr
12.39
Shift left logical
SQRTF
F-P
14.08A
Square root F_floating
SQRTG
F-P
14.0AA
Square root G_floating
SQRTS
F-P
14.08B
Square root S_floating
SQRTT
F-P
14.0AB
Square root T_floating
SRA
Opr
12.3C
Shift right arithmetic
SRL
Opr
12.34
Shift right logical
STB
Mem
0E
Store byte
STF
Mem
24 Store
F_floating
STG
Mem
25
Store G_floating
STL
Mem
2C
Store longword
STL_C
Mem
2E
Store longword conditional
STQ
Mem
2D
Store quadword
STQ_C
Mem
2F
Store quadword conditional
STQ_U
Mem
0F
Store unaligned quadword
STS
Mem
26 Store
S_floating
STT
Mem
27 Store
T_floating
Table A–2 Architecture Instructions (Continued)
Mnemonic
Format
Opcode
Description