GMS30C2116 Datasheet, PDF (49/322 Pages) Hynix Semiconductor – USERS MANUAL

INSTRUCTIONS GENERAL
2-1
2. Instructions General
2.1 Instruction Notation
In the following instruction-set presentation, an informal description of an instruction is
followed by a formal description in the form:
Format
Notation
Operation
Format denotes the instruction format.
Notation gives the assembler notation of the instruction.
Operation describes the operation in a Pascal-like notation with the following symbols:
Ls denotes any of the local registers L0..L15 used as source register or as source
operand. At memory Load instructions, Ls denotes the load destination register.
Ld denotes any of the local registers L0..L15 used as destination register or as
destination operand.
Rs denotes any of the local registers L0..L15 or any of the global registers G0..G15
used as source register or as source operand. At memory Load, see Ls.
Rd denotes any of the local registers L0..L15 or any of the global registers G0..G15
used as destination register or as destination operand.
Lsf, Ldf, Rsf and Rdf denote the register or operand following after (with a register address
one higher than) Ls, Ld, Rs and Rd respectively.
imm, const, dis, lim, rel, adr and n denote immediate operands (constants) of various
formats and ranges.
Operand(x) denotes a single bit at the bit position x of an operand.
Example: Ld(31) denotes bit 31 of Ld.
Operand(x..y) denotes bits x through y of an operand.
Example: Ls(4..0) denotes bits 4 through 0 of Ls.
Expression^ denotes an operand at a location addressed by the value of the expression.
Depending on the context, the expression addresses a memory location or a local
register.
Example: Ld^ denotes a memory operand whose memory address is the operand Ld.
(FP + FL)^ denotes a local register operand whose register address is FP + FL.
: = signifies the assignment symbol, read as "is replaced by".
// signifies the concatenation symbol. It denotes concatenation of two operand words
to a double-word operand or concatenation of bits and bit-string.
Examples: Ld//Ldf denotes a double-word operand, 16 zeros//imm1 denotes
expanding of an immediate half word by 16 leading zeros.
=, ≠, > and < denote the equal, unequal, greater than and less than relations.
Example: The relation Ld = 0 evaluates to one if Ld is equal to zero, otherwise it
evaluates to zero.