RACW | CS+ V7.00.00

RACW	Round the accumulator word	RACW
	Round ACcumulator Word

[Syntax]

(1)

RACW src

(2)	RACW src, Adest [V2.01.00 or later]

[Operation]

(1)	signed long long tmp;

tmp = (signed long long) ACC << src;

tmp = tmp + 0000000080000000h;

if (tmp > (signed long long) 00007FFF00000000h)

ACC = 00007FFF00000000h;

else if (tmp < (signed long long) FFFF800000000000h)

ACC = FFFF800000000000h;

else

ACC = tmp & FFFFFFFF00000000h

(2)	signed 72bit tmp;

signed 73bit tmp73;

tmp = (signed 72bit) Adest << src;

tmp73 = (signed 73bit) tmp + 0000000000080000000h;

if (tmp73 > (signed 73bit) 00000007FFF00000000h)

Adest = 0000007FFF00000000h;

else if (tmp73 < (signed 73bit) 1FFFFFF800000000000h)

Adest = FFFFFF800000000000h;

else

Adest = tmp & FFFFFFFFFF00000000h;

[V2.01.00 or later]

[Function]

-	This instruction rounds the value of the accumulator into a word and stores the result in the accumulator.

-	The RACW instruction is executed according to the following procedures.

Processing 1:

The value of the accumulator is shifted to the left by one or two bits as specified by src

Processing 2:

The value of the accumulator changes according to the value of 64 bits after the contents have been shifted to the left by one or two bits.

[Instruction Format]

Note	* For the RX Family assembler manufactured by Renesas Electronics Corp., enter 1 or 2 as the immediate value (IMM:1). The value minus 1 will be stored in the instruction code.

Note	Specify A0 (ACC0) or A1 (ACC1) as Adest.

[Flag Change]

-	This instruction does not affect the states of flags.

[Description Example]

RACW #1

RACW #2

RACW #1, A1

RACW #2, A0