LightweightArchitecture64

Introduction

LA64 is a 64bit lightweight architecture. It's a mix out of RISC and CISC it is based on no previous architecture, its only inspired by previous architectures like aarch64.

Instruction Set

Core

Instruction	Opcode	Format
hlt	0b00000000	op
nop	0b00000001	op

Data

Instruction	Opcode	Format
mov	0b00000010	op dest, any
swp	0b00000011	op dest, src
swpz	0b00000100	op dest, src
push	0b00000101	op src, ...32
pop	0b00000110	op dest, ...32
ldb	0b00000111	op dest, any
ldw	0b00001000	op dest, any
ldd	0b00001001	op dest, any
ldq	0b00001010	op dest, any
stb	0b00001011	op any, src
stw	0b00001100	op any, src
std	0b00001101	op any, src
stq	0b00001110	op any, src

ALU

Instruction	Opcode	Format
add	0b00001111	op dest, any or op dest, any, any
sub	0b00010000	op dest, any or op dest, src, any
mul	0b00010001	op dest, any or op dest, src, any
div	0b00010010	op dest, any or op dest, src, any
idiv	0b00010011	op dest, any or op dest, src, any
mod	0b00010100	op dest, any or op dest, src, any
not	0b00010101	op dest, ...32
neg	0b00010110	op dest, ...32
and	0b00010111	op dest, any or op dest, src, any
or	0b00011000	op dest, any or op dest, src, any
xor	0b00011001	op dest, any or op dest, src, any
shr	0b00011010	op dest, any or op dest, src, any
shl	0b00011011	op dest, any or op dest, src, any
sar	0b00011100	op dest, any or op dest, src, any
ror	0b00011101	op dest, any or op dest, src, any
rol	0b00011110	op dest, any or op dest, src, any
pdep	0b00011111
pext	0b00100000
bswapw	0b00100001
bswapd	0b00100010
bswapq	0b00100011

Control flow

Instruction	Opcode	Format
b	0b00100100	op any
cmp	0b00100101	op any, any
be	0b00100110	op any
bne	0b00100111	op any
blt	0b00101000	op any
bgt	0b00101001	op any
ble	0b00101010	op any
bge	0b00101011	op any
bz	0b00101100	op reg, any
bnz	0b00101101	op reg, any
bl	0b00101110	op any
ret	0b00101111	op
iret	0b00110000	op