b43-tools/assembler

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== Instruction Set Summary for the core revision >= 5 microcode ==
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Mnemonics | Operands | Description | Operation
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Arithmetic and logic instructions:
add | A,B,rD | Add | rD=A+B
add. | A,B,rD | Add, set Carry | rD=A+B SaveCarry
addc | A,B,rD | Add with Carry | rD=A+B+Carry
addc. | A,B,rD | Add with Carry, set Carry | rD=A+B+C SaveCarry
sub | A,B,rD | Subtract | rD=A-B
sub. | A,B,rD | Sub, set Carry | rD=A-B SaveCarry
subc | A,B,rD | Sub with Carry | rD=A-B-Carry
subc. | A,B,rD | Sub with Carry, set Carry | rD=A-B-C SaveCarry
mul | A,B,rD | multiply (rev 11+ only) | spr06d=lsb; rD=msb

Branch instructions:
jmp | l | Uncond. jump (virtual instr.) | PC=l
jand | A,B,l | Jump if binary AND | if(A&B) PC=l
jnand | A,B,l | Jump if not binary AND | if(!(A&B)) PC=l
js | A,B,l | Jump if all bits set | if((A&B)==A) PC=l
jns | A,B,l | Jump if not all bits set | if((A&B)!=A) PC=l
je | A,B,l | Jump if equal | if(A==B) PC=l
jne | A,B,l | Jump if not equal | if(A!=B) PC=l
jls | A,B,l | Jump if less (signed) | if(Ajges | A,B,l | Jump if greater or equal (sign.)| if(A>=B) PC=l
jgs | A,B,l | Jump if greater (signed) | if(A>B) PC=l
jles | A,B,l | Jump if less or equal (signed) | if(A<=B) PC=l
jl | A,B,l | Jump if less | if(Ajge | A,B,l | Jump if greater or equal | if(A>=B) PC=l
jg | A,B,l | Jump if greater | if(A>B) PC=l
jle | A,B,l | Jump if less or equal | if(A<=B) PC=l
jdn | A,B,l | Jump if diff is < 0, no carry | if(nc(A-B)<0) PC=l
jdpz | A,B,l | Jump if diff is >= 0, no carry | if(nc(A-B)>=0) PC=l
jdp | A,B,l | Jump if diff is > 0, no carry | if(nc(A-B)>0) PC=l
jdnz | A,B,l | Jump if diff is <= 0, no carry | if(nc(A-B)<=0) PC=l
call | lrX,l | Store PC, call function | lrX=PC; PC=l
calls | l | Store PC, call function | PC->stack; PC=l
ret | lrX,lrY | Store PC, ret from func | lrX=PC; PC=lrY
rets | | ret from function | stack->PC
jzx | M,S,A,B,l | Jump if zero after shift + mask |
jnzx | M,S,A,B,l | Jump if nonzero after shift+msk |
jext | E,A,B,l | Jump if External Condition true | if(E) PC=l
jnext | E,A,B,l | Jump if External Condition false| if(!E) PC=l

Data transfer instructions:
mov | A,rD | Copy data (virtual instruction) | rD=A
tkiph | A,rD | TKIP S-Box lookup high | rD=SBOX[hi8(A)]
tkiphs | A,rD | TKIP S-Box lkup hi swap'd | rD=byteswap(tkiph)
tkipl | A,rD | TKIP S-Box lookup low | rD=SBOX[lo8(A)]
tkipls | A,rD | TKIP S-Box lkup lo swap'd | rD=byteswap(tkipl)

Bitwise instructions:
sra | A,B,rD | Arithmetic rightshift | rD=A>>B fillup sign
or | A,B,rD | Bitwise OR | rD=A|B
and | A,B,rD | Bitwise AND | rD=A&B
xor | A,B,rD | Bitwise XOR | rD=A^B
sr | A,B,rD | Rightshift | rD=A>>B
sl | A,B,rD | Leftshift | rD=A<srx | M,S,A,B,rD | Shift right over two registers | See detailed docs
rl | A,B,rD | Rotate left | rD=lrot(A, B bits)
rr | A,B,rD | Rotate right | rD=rrot(A, B bits)
nand | A,B,rD | Clear bits (notmask+and) | rD=A&(~B)
orx | M,S,A,B,rD | OR with shift and select | See detailed docs

Other instructions:
nap | none | Sleep until event | See detailed docs



Description of Operands:

rD = Destination Register (GPR or SPR)
A = Source Register (GPR or SPR) or Immediate
B = Source Register (GPR or SPR) or Immediate
M = Mask
S = Shift
E = External Condition
l = Branch label or address
lrX = Link Register (lr0 - lr3)
lrY = Link Register (lr0 - lr3)


Raw instruction format:
@bitcode_in_hexadecimal
Example: @1C0 @C11,@C22,r3


Virtual instructions are translated by the assembler to other
lowlevel instructions.


Please also see the detailed microcode documentation at:
http://bcm-v4.sipsolutions.net/802.11/Microcode