Nios ii Instruction Macros

When we try to run an application program on Altera Monitor Program, there should be a file (written in macroprocessor language) included i main program that defines the instructions we have used in main program.

For example "nios_macros.s":

--- Quote Start ---

.ifndef _nios2_macros_

.equ _nios2_macros_,1

# --------------------

# GEQU symbol, value

#

# Macro to define a global symbol

.macro GEQU sym,val

.global \sym

.equ \sym,\val

.endm

# --------------------

# GFUNC symbol

#

# Macro to define a global function

.macro GFUNC sym

.global \sym

.type \sym, @function

\sym:

.endm

# --------------------

# MOVI32 $reg, imm32

#

# Macro to move a 32-bit immediate into a register.

.macro MOVI32 reg, val

movhi \reg, %hi(\val)

ori \reg, \reg, %lo(\val)

.endm

# --------------------

# MOVIA $reg, address

#

# Macro to move a 32-bit address into a register.

.macro MOVIA reg, addr

movhi \reg, %hi(\addr)

ori \reg, \reg, %lo(\addr)

.endm

# +----------------------------

# | MOVIK32 reg,value

# |

# | for constants only, no linker action

# | uses only one instruction if possible

# |

.macro MOVIK32 _dst,_val

.if (\_val & 0xffff0000) == 0

MOVUI \_dst,%lo(\_val)

.elseif (\_val & 0x0000ffff) == 0

MOVHI \_dst,%hi(\_val)

.else

MOVHI \_dst,%hi(\_val)

ORI \_dst,\_dst,%lo(\_val)

.endif

.endm

.endif# _nios2_macros_

# end of file

--- Quote End ---