Texas Instruments TMS320C3x 사용자 설명서

CPU Primary Register File

2-9

Architectural Overview

The ’C3x provides 28 registers in a multiport register file that is tightly coupled
to the CPU. Table 2–1 lists the register names and functions.

All of the primary registers can be operated upon by the multiplier and ALU and
can be used as general-purpose registers. The registers also have some special
functions. For example, the eight extended-precision registers are especially
suited for maintaining extended-precision floating-point results. The eight auxiliary
registers support a variety of indirect addressing modes and can be used as
general-purpose 32-bit integer and logical registers. The remaining registers
provide such system functions as addressing, stack management, processor
status, interrupts, and block repeat. See Chapter 3, 

CPU Registers, for more

information.

Table 2–1. Primary CPU Registers 

R0

Extended-precision register 0

3.1.1

R1

Extended-precision register 1

3.1.1

R2

Extended-precision register 2

3.1.1

R3

Extended-precision register 3

3.1.1

R4

Extended-precision register 4

3.1.1

R5

Extended-precision register 5

3.1.1

R6

Extended-precision register 6

3.1.1

R7

Extended-precision register 7

3.1.1

AR0

Auxiliary register 0

3.1.2

AR1

Auxiliary register 1

3.1.2

AR2

Auxiliary register 2

3.1.2

AR3

Auxiliary register 3

3.1.2

AR4

Auxiliary register 4

3.1.2

AR5

Auxiliary register 5

3.1.2

AR6

Auxiliary register 6

3.1.2

AR7

Auxiliary register 7

3.1.2

DP

Data-page pointer

3.1.3

IR0

Index register 0

3.1.4