HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 84

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 2 CPU
Instruction
EXTU
EXTS
TAS*
Notes: 1. Size refers to the operand size.
Rev.3.00 Mar. 26, 2007 Page 42 of 772
REJ09B0355-0300
2
2. Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction.
B: Byte
W: Word
L:
Longword
B
Size*
W/L
W/L
1
Function
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by padding with zeros on the
left.
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by extending the sign bit.
@ERd – 0, 1
Tests memory contents, and sets the most significant bit (bit 7) to 1.
Rd (zero extension)
Rd (sign extension)
(<bit 7> of @Erd)
Rd
Rd