Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario descargar pdf (Pagina 39)

5 INSTRUCTION SET

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

5.7 Data Transfer Instructions

The transfer instructions in the C33 PE Core support data transfer between one register and another, as well as

between a register and memory. A transfer data size and data extension format can be specified in the instruction

code. In mnemonics, this specification is classified as follows:

ld.b Signed byte data transfer

ld.ub Unsigned byte data transfer

ld.h Signed halfword data transfer

ld.uh Unsigned halfword data transfer

ld.w Word data transfer

In signed byte or halfword transfers to registers, the source data is sign-extended to 32 bits. In unsigned byte or

halfword transfers, the source data is zero-extended to 32 bits.

In transfers in which data is transferred from registers, data of a specified size on the lower side of the register is the

data to be transferred.

If the destination of transfer is a general-purpose register, the register content after a transfer is as follows:

Signed byte data transfer

SSSSSSSS

31 24

Extended with the sign in bit 7 of the byte data

23 16 15 8

Byte data

7 0

SSSSSSSS

Unsigned byte data transfer

00000000

31 24 23 16 15 8

Byte data

7 0

00000000

Signed halfword data transfer

SSSSSSSS

Extended with the sign in bit 15 of the halfword data

16 15

Halfword data

SSSSSSSS

Unsigned halfword data transfer

00000000

31 16 15

Halfword data

00000000

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 180 181

Sin comentarios

Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario Pagina 39