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3.21.37 OpenRISC Options ¶

These options are defined for OpenRISC:

-mboard=name ¶: Configure a board specific runtime. This is passed to the linker fornewlib board library linking. The default isor1ksim.
-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-precisionfloating point instructions. By default functions fromlibgcc are usedto perform double-precision floating point operations.
-munordered-float ¶: When-mhard-float is selected, enables generation of unorderedfloating point compare and set flag (lf.sfun*) instructions. By defaultfunctions fromlibgcc are used to perform unordered floating pointcompare and set flag operations.
-mcmov ¶: Enable generation of conditional move (l.cmov) instructions. Bydefault the equivalents are generated using set and branch.
-mror ¶: Enable generation of rotate right (l.ror) instructions. By defaultfunctions fromlibgcc are used to perform rotate right operations.
-mrori ¶: Enable generation of rotate right with immediate (l.rori) instructions.By default functions fromlibgcc are used to perform rotate right withimmediate operations.
-msext ¶: Enable generation of sign extension (l.ext*) instructions. By defaultmemory 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 are generated to store theimmediate to a register first.
-mshftimm ¶: Enable generation of shift with immediate (l.srai,l.srli,l.slli) instructions. By default extra instructions are generatedto store the immediate to a register first.
-mcmodel=small ¶: Generate OpenRISC code for the small model: The GOT is limited to 64k andfunction call jumps are limited to 64M offsets. This is the default model.
-mcmodel=large ¶: Generate OpenRISC code for the large model: The GOT may grow up to 4G in sizeand function call jumps can target the full 4G address space.