SPARC Assembly/Arithmetic Instructions
Contents
Arithmetic Instructions[edit]
These are the basic operations used for addition, subtraction, and multiplication. Note that any of these arithmetic instructions may take a register or an immediate value as the op2 parameter. All other parameters (rd and rs1 must be registers).
Instruction:


Adds rs1 and op2, and stores result in rd.
Instruction:


Same as above, except that it sets the condition codes.
Instruction:


subtracts op2 from rs1, and stores the difference in rd
Instruction:


same as above, except that it sets the condition codes.
Instruction:


Performs a single step in the multiplication operation. Stores partial results in register Y. Complete multiplication algorithms are discussed in more detail later.
Extended Precision[edit]
These instructions account for the carry bit setting, so that large numbers (larger then the machine word) can be virtually manipulated as a single entity.
Instruction:


Performs extended addition (adds two operands and carry bit), and stores result in rd.
Instruction:


Same as above, but sets the condition codes.
Instruction:


Performs extended subtractions (subtracts op2 and C from rs1) and stores result in rd.
Instruction:


same as above, but sets the condition codes.
Tagged Instructions[edit]
Instruction:


Instruction:


Instruction:


Instruction:


Y Register[edit]
These operations affect the Y register.
Instruction:


reads the contents of the Y register in to the rd destination register
Instruction:


exclusively ORs the rs1 and op2 values, and stores that result in the Y register.
Logic Instructions[edit]
Instruction:


performs the bitwise AND of rs1 and op2, and stores the result in rd.
Instruction:


same as above, sets the condition codes.
Instruction:


performs the bitwise OR of rs1 and op2, and stores the result in rd.
Instruction:


same as above, sets the condition codes.
Instruction:


performs the bitwise XOR, between rs1 and op2. stores the result in rd.
Instruction:


same as above, sets the condition codes.
Instruction:


performs the bitwise XNOR between rs1 and op2. puts result in rd.
Instruction:


same as above, sets condition codes.
Inverted Logic Operations[edit]
Instruction:


ANDs rs1 and the bitwise inverse of op2. stores result in rd.
Instruction:


same as above, sets condition codes.
Instruction:


ORs rs1 and the bitwise inverse of op2. stores the result in rd.
Instruction:


same as above, sets the condition codes.
Shift Instructions[edit]
Instruction:


performs the logical leftshift of rs1. Shift amount is according to value of op2. result is stored in rd.
Instruction:


performs the logical rightshift of rs1. Shift amount is the value of op2. stores the result into rd.
Instruction:


performs the arithmetic rightshft of rs1. shift amount is the value of op2. stores the result in rd.