GMS30C2116 Datasheet, PDF (275/322 Pages) Hynix Semiconductor – USERS MANUAL

Appendix A. Instruction Set Details
Multiply Word
A-101
MUL
Format:
RR format
15
OP-code
1011 11
10 9 8 7
43
0
ds
Rd-code
Rs-code
s = 0: Rs-code encoded G0..G15 for Rs
s = 1: Rs-code encoded L0..L15 for Rs
d = 0: Rd-code encoded G0..G15 for Rd
d = 1: Rd-code encoded L0..L15 for Rd
Notation:
MUL Rd, Rs
Description:
The source operand and the destination operand are multiplied, the low-order word of the
product is placed in the destination register (the high-order product word is not evaluated)
and the condition flags are set or cleared according to the single-word product.
Both operands are either signed or unsigned integers, the product is a single-word integer.
The result is undefined if the PC or the SR is denoted.
Operation:
Rs := low order word of product Rd * Rs;
Z := sinlgeword product = 0;
N := Rd(31);
- sing of singleword product;
- valid for singed operands;
V := undefined;
C := undefined;
Exceptions:
None.