Alpha Instruction Summary; Architecture Instructions; A–2 Architecture Instructions - Compaq 21264 Hardware Reference Manual

Alpha Instruction Summary

Table A–1 Instruction Format and Opcode Notation (Continued)
Instruction Format
Memory/ branch
Operate
PALcode
Qualifiers for operate instructions are shown in Table A–2. Qualifiers for IEEE and
VAX floating-point instructions are shown in Tables A–5 and A–6, respectively.
Table A–2 Architecture Instructions
Mnemonic Format
ADDF F-P
ADDG F-P
ADDL Opr
ADDL/V Opr
ADDQ Opr
ADDQ/V Opr
ADDS F-P
ADDT F-P
AMASK Opr
AND Opr
BEQ Bra
BGE Bra
BGT Bra
BIC Opr
BIS Opr
BLBC Bra
BLBS Bra
BLE Bra
BLT Bra
BNE Bra
BR Bra
Alpha Instruction Set
A–2
Format Opcode
Symbol Notation
Mbr oo.h
Opr oo.ff
Pcd oo
Opcode Description
15.080 Add F_floating
15.0A0 Add G_floating
10.00 Add longword
10.40 Add longword with integer overflow enable
10.20 Add quadword
10.60 Add quadword with integer overflow enable
16.080 Add S_floating
16.0A0 Add T_floating
11.61 Architecture mask
11.00 Logical product
39 Branch if
3E Branch if zero
3F Branch if > zero
11.08 Bit clear
11.20 Logical sum
38 Branch if low bit clear
3C Branch if low bit set
3B Branch if
3A Branch if < zero
3D
Branch if
30 Unconditional branch
Meaning
oo is the 6-bit opcode field.
h is the high-order 2 bits of the displacement field.
oo is the 6-bit opcode field.
ff is the 7-bit function code field.
oo is the 6-bit opcode field; the particular PAL-
code instruction is specified in the 26-bit function
code field.
zero
zero
zero
Alpha 21264/EV67 Hardware Reference Manual