Laptop User Manual

S3C2440A RISC MICROPROCESSOR ARM INSTRUCTION SET
3-27
ASSEMBLER SYNTAX
Table 3-5. Assembler Syntax Descriptions
Mnemonic Description Purpose
UMULL{cond}{S} RdLo,RdHi,Rm,Rs Unsigned Multiply Long 32 x 32 = 64
UMLAL{cond}{S} RdLo,RdHi,Rm,Rs Unsigned Multiply & Accumulate Long 32 x 32 + 64 = 64
SMULL{cond}{S} RdLo,RdHi,Rm,Rs Signed Multiply Long 32 x 32 = 64
SMLAL{cond}{S} RdLo,RdHi,Rm,Rs Signed Multiply & Accumulate Long 32 x 32 + 64 = 64
where:
{cond} Two-character condition mnemonic. See Table 3-2.
{S} Set condition codes if S present
RdLo, RdHi, Rm, Rs Expressions evaluating to a register number other than R15.
EXAMPLES
UMULL R1,R4,R2,R3 ; R4,R1:=R2*R3
UMLALS R1,R5,R2,R3 ; R5,R1:=R2*R3+R5,R1 also setting condition codes