AND Immediate

D-Form

• andi. RA,RS,UI

Pseudo-code:

RA <- (RS) & XLCASTU(UI)

Special Registers Altered:

CR0

OR Immediate

D-Form

• ori RA,RS,UI

Pseudo-code:

RA <- (RS) | XLCASTU(UI)

Special Registers Altered:

None

AND Immediate Shifted

D-Form

• andis. RA,RS,UI

Pseudo-code:

RA <- (RS) & XLCASTU(UI || [0]*16)

Special Registers Altered:

CR0

OR Immediate Shifted

D-Form

• oris RA,RS,UI

Pseudo-code:

RA <- (RS) | XLCASTU(UI || [0]*16)

Special Registers Altered:

None

XOR Immediate Shifted

D-Form

• xoris RA,RS,UI

Pseudo-code:

RA <- (RS) ^ XLCASTU(UI || [0]*16)

Special Registers Altered:

None

XOR Immediate

D-Form

• xori RA,RS,UI

Pseudo-code:

RA <- (RS) ^ XLCASTU(UI)

Special Registers Altered:

None

AND

X-Form

• and RA,RS,RB (Rc=0)
• and. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- (RS) & (RB)

Special Registers Altered:

CR0                    (if Rc=1)

OR

X-Form

• or RA,RS,RB (Rc=0)
• or. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- (RS) | (RB)

Special Registers Altered:

CR0                    (if Rc=1)

XOR

X-Form

• xor RA,RS,RB (Rc=0)
• xor. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- (RS) ^ (RB)

Special Registers Altered:

CR0                    (if Rc=1)

NAND

X-Form

• nand RA,RS,RB (Rc=0)
• nand. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- ¬((RS) & (RB))

Special Registers Altered:

CR0                    (if Rc=1)

NOR

X-Form

• nor RA,RS,RB (Rc=0)
• nor. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- ¬((RS) | (RB))

Special Registers Altered:

CR0                    (if Rc=1)

Equivalent

X-Form

• eqv RA,RS,RB (Rc=0)
• eqv. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- ¬((RS) ^ (RB))

Special Registers Altered:

CR0                    (if Rc=1)

AND with Complement

X-Form

• andc RA,RS,RB (Rc=0)
• andc. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- (RS) &  ¬(RB)

Special Registers Altered:

CR0                    (if Rc=1)

OR with Complement

X-Form

• orc RA,RS,RB (Rc=0)
• orc. RA,RS,RB (Rc=1)

Pseudo-code:

RA <- (RS) |  ¬(RB)

Special Registers Altered:

CR0                    (if Rc=1)

Extend Sign Byte

X-Form

• extsb RA,RS (Rc=0)
• extsb. RA,RS (Rc=1)

Pseudo-code:

RA <- EXTSXL(RS, 8)

Special Registers Altered:

CR0                    (if Rc=1)

Extend Sign Halfword

X-Form

• extsh RA,RS (Rc=0)
• extsh. RA,RS (Rc=1)

Pseudo-code:

RA <- EXTSXL(RS, 16)

Special Registers Altered:

CR0                    (if Rc=1)

Count Leading Zeros Word

X-Form

• cntlzw RA,RS (Rc=0)
• cntlzw. RA,RS (Rc=1)

Pseudo-code:

n <- (XLEN/2)
do while n < XLEN
   if (RS)[n] = 1 then
       leave
   n <- n + 1
RA <- n - (XLEN/2)

Special Registers Altered:

CR0                    (if Rc=1)

Count Trailing Zeros Word

X-Form

• cnttzw RA,RS (Rc=0)
• cnttzw. RA,RS (Rc=1)

Pseudo-code:

n <- 0
do while n < 32
   if (RS)[63-n] = 0b1 then
        leave
   n  <- n + 1
RA <- EXTZ64(n)

Special Registers Altered:

CR0                    (if Rc=1)

Compare Bytes

X-Form

• cmpb RA,RS,RB

Pseudo-code:

do n = 0 to ((XLEN/8)-1)
    if RS[8*n:8* n+7] = (RB)[8*n:8*n+7] then
       RA[8*n:8* n+7] <- [1]*8
    else
       RA[8*n:8* n+7] <- [0]*8

Special Registers Altered:

None

Population Count Bytes

X-Form

• popcntb RA,RS

Pseudo-code:

do i = 0 to ((XLEN/8)-1)
   n <-  0
   do j = 0 to 7
      if (RS)[(i*8)+j] = 1 then
          n <- n+1
   RA[(i*8):(i*8)+7] <-  n

Special Registers Altered:

None

Population Count Words

X-Form

• popcntw RA,RS

Pseudo-code:

e <- (XLEN/2)-1
do i = 0 to 1
   s <- i*XLEN/2
   n <-  0
   do j = 0 to e
      if (RS)[s+j] = 1 then
          n <- n+1
   RA[s:s+e] <- n

Special Registers Altered:

None

Parity Doubleword

X-Form

• prtyd RA,RS

Pseudo-code:

s <- 0
do i = 0 to ((XLEN/8)-1)
    s <- s ^ (RS)[i*8+7]
RA <- [0] * (XLEN-1) || s

Special Registers Altered:

None

Parity Word

X-Form

• prtyw RA,RS

Pseudo-code:

s <- 0
t <- 0
do i = 0 to ((XLEN/8/2)-1)
    s <-  s ^ (RS)[i*8+7]
do i = 4 to ((XLEN/8)-1)
    t <-  t ^ (RS)[i*8+7]
RA[0:(XLEN/2)-1] <- [0]*((XLEN/2)-1) || s
RA[XLEN/2:XLEN-1] <- [0]*((XLEN/2)-1) || t

Special Registers Altered:

None

Extend Sign Word

X-Form

• extsw RA,RS (Rc=0)
• extsw. RA,RS (Rc=1)

Pseudo-code:

RA <- EXTSXL(RS, 32)

Special Registers Altered:

CR0                    (if Rc=1)

Population Count Doubleword

X-Form

• popcntd RA,RS

Pseudo-code:

n <- 0
do i = 0 to (XLEN-1)
   if (RS)[i] = 1 then
       n <-  n+1
RA <- n

Special Registers Altered:

None

Count Leading Zeros Doubleword

X-Form

• cntlzd RA,RS (Rc=0)
• cntlzd. RA,RS (Rc=1)

Pseudo-code:

n <- 0
do while n < XLEN
  if (RS)[n]  = 1 then
     leave
  n <- n + 1
RA <- n

Special Registers Altered:

CR0                    (if Rc=1)

Count Trailing Zeros Doubleword

X-Form

• cnttzd RA,RS (Rc=0)
• cnttzd. RA,RS (Rc=1)

Pseudo-code:

n  <- 0
do while n < XLEN
   if (RS)[XLEN-1-n] = 0b1 then
        leave
   n  <- n + 1
RA <- EXTZ64(n)

Special Registers Altered:

CR0                    (if Rc=1)

Bit Permute Doubleword

X-Form

• bpermd RA,RS,RB

Pseudo-code:

perm <- [0] * 8
for i = 0 to ((XLEN/8)-1)
   index <- (RS)[8*i:8*i+7]
   if index <u XLEN then
        perm[i] <- (RB)[index]
   else
        perm[i] <- 0
RA <- [0]*(XLEN-8) || perm[0:7]

Special Registers Altered:

None