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Compaq 21264 User Manual

Page 273

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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