Next: , Previous: Nvidia PTX Options, Up: Submodel Options


3.19.38 OpenRISC Options

These options are defined for OpenRISC:

-mboard=name
Configure a board specific runtime. This will be passed to the linker for newlib board library linking. The default is or1ksim.
-mnewlib
This option is ignored; it is for compatibility purposes only. This used to select linker and preprocessor options for use with newlib.
-msoft-div
-mhard-div
Select software or hardware divide (l.div, l.divu) instructions. This default is hardware divide.
-msoft-mul
-mhard-mul
Select software or hardware multiply (l.mul, l.muli) instructions. This default is hardware multiply.
-msoft-float
-mhard-float
Select software or hardware for floating point operations. The default is software.
-mdouble-float
When -mhard-float is selected, enables generation of double-precision floating point instructions. By default functions from libgcc are used to perform double-precision floating point operations.
-munordered-float
When -mhard-float is selected, enables generation of unordered floating point compare and set flag (lf.sfun*) instructions. By default functions from libgcc are used to perform unordered floating point compare and set flag operations.
-mcmov
Enable generation of conditional move (l.cmov) instructions. By default the equivalent will be generated using set and branch.
-mror
Enable generation of rotate right (l.ror) instructions. By default functions from libgcc are used to perform rotate right operations.
-mrori
Enable generation of rotate right with immediate (l.rori) instructions. By default functions from libgcc are used to perform rotate right with immediate operations.
-msext
Enable generation of sign extension (l.ext*) instructions. By default memory loads are used to perform sign extension.
-msfimm
Enable generation of compare and set flag with immediate (l.sf*i) instructions. By default extra instructions will be generated to store the immediate to a register first.
-mshftimm
Enable generation of shift with immediate (l.srai, l.srli, l.slli) instructions. By default extra instructions will be generated to store the immediate to a register first.
-mcmodel=small
Generate OpenRISC code for the small model: The GOT is limited to 64k. This is the default model.
-mcmodel=large
Generate OpenRISC code for the large model: The GOT may grow up to 4G in size.