9.20.2.1 Register Names

LM32 has 32 x 32-bit general purpose registers ‘r0’, ‘r1’, ... ‘r31’.

The following aliases are defined: ‘gp’ - ‘r26’, ‘fp’ - ‘r27’, ‘sp’ - ‘r28’, ‘ra’ - ‘r29’, ‘ea’ - ‘r30’, ‘ba’ - ‘r31’.

LM32 has the following Control and Status Registers (CSRs).

IE

Interrupt enable.

IM

Interrupt mask.

IP

Interrupt pending.

ICC

Instruction cache control.

DCC

Data cache control.

CC

Cycle counter.

CFG

Configuration.

EBA

Exception base address.

DC

Debug control.

DEBA

Debug exception base address.

JTX

JTAG transmit.

JRX

JTAG receive.

BP0

Breakpoint 0.

BP1

Breakpoint 1.

BP2

Breakpoint 2.

BP3

Breakpoint 3.

WP0

Watchpoint 0.

WP1

Watchpoint 1.

WP2

Watchpoint 2.

WP3

Watchpoint 3.