
UMUL Instruction UM018809-0611
184
ZNEO
®
CPU Core
User Manual
UMUL
Definition
Unsigned Multiply
Syntax
UMUL dst, src
Operation
dst (dst src)[31:0]
src (dst src)[63:32]
Description
This instruction performs a multiplication of two unsigned 32-bit values with an unsigned 64-bit
result. Result bits [31:0] are written to the destination register. Result bits [63:32] are written to
the source register.
Flags
Syntax and Opcodes
76543210
C Z S V B CIRQE IRQE
–* *00–––
Legend
C = No change.
Z = Set to 1 if bits [63:0] of the result are zero; otherwise set to 0.
S = Set to 1 if bit [63] of the result is 1; otherwise set to 0.
V = Cleared to 0.
B = Cleared to 0.
CIRQE = No change.
IRQE = No change.
Instruction, Operands Word 0 Word 1 Word 2
UMUL Rd, Rs {B0H, Rs, Rd}
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