Trap Word Immediate

D-Form

  • twi TO,RA,SI

Pseudo-code:

a <- EXTS((RA)[32:63])
if (a < EXTS(SI)) & TO[0]  then TRAP
if (a > EXTS(SI)) & TO[1]  then TRAP
if (a = EXTS(SI)) & TO[2]  then TRAP
if (a <u EXTS(SI)) & TO[3] then TRAP
if (a >u EXTS(SI)) & TO[4] then TRAP

Special Registers Altered:

None

Trap Word

X-Form

  • tw TO,RA,RB

Pseudo-code:

a <- EXTS((RA)[32:63])
b <- EXTS((RB)[32:63])
if (a < b) & TO[0] then TRAP
if (a > b) & TO[1] then TRAP
if (a = b) & TO[2] then TRAP
if (a <u b) & TO[3] then TRAP
if (a >u b) & TO[4] then TRAP

Special Registers Altered:

None

Trap Doubleword Immediate

D-Form

  • tdi TO,RA,SI

Pseudo-code:

a <- (RA)
b <- EXTS(SI)
if (a < b) & TO[0] then TRAP
if (a > b) & TO[1] then TRAP
if (a = b) & TO[2] then TRAP
if (a <u  b) & TO[3] then TRAP
if (a >u  b) & TO[4]  then TRAP

Special Registers Altered:

None

Trap Doubleword

X-Form

  • td TO,RA,RB

Pseudo-code:

a <- (RA)
b <- (RB)
if (a < b) & TO[0] then TRAP
if (a > b) & TO[1] then TRAP
if (a = b) & TO[2] then TRAP
if (a <u b) & TO[3] then TRAP
if (a >u b) & TO[4]  then TRAP

Special Registers Altered:

None

Integer Select

A-Form

  • isel RT,RA,RB,BC

Pseudo-code:

if RA=0 then a <-0
else a <-  (RA)
if CR[BC+32]=1 then RT <- a
else           RT <- (RB)

Special Registers Altered:

None