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single-precision -mcustom-* options
Version 6, changed by kerry. 09/28/2006. Show version history
| first operand | second operand | operation | result | nios2-elf-gcc option | GCC pattern name |
| float | float | + | float | -mcustom-fadds=N | addsf3 |
| float | float | - | float | -mcustom-fsubs=N | subsf3 |
| float | float | * | float | -mcustom-fmuls=N | mulsf3 |
| float | float | / | float | -mcustom-fdivs=N | divsf3 |
| float | float | min | float | -mcustom-fmins=N | minsf3 |
| float | float | max | float | -mcustom-fmaxs=N | maxsf3 |
| float | none | negation | float | -mcustom-fnegs=N | negsf2 |
| float | none | abs | float | -mcustom-fabss=N | abssf2 |
| float | none | sqrt | float | -mcustom-fsqrts=N | sqrtsf2 |
| float | none | cos | float | -mcustom-fcoss=N | cossf2 |
| float | none | sin | float | -mcustom-fsins=N | sinsf2 |
| float | none | tan | float | -mcustom-ftans=N | tansf2 |
| float | none | atan | float | -mcustom-fatans=N | atansf2 |
| float | none | exp | float | -mcustom-fexps=N | expsf2 |
| float | none | log | float | -mcustom-flogs=N | logsf2 |
| float | float | < | int | -mcustom-fcmplts=N | nios2_sltsf |
| float | float | <= | int | -mcustom-fcmples=N | nios2_slesf |
| float | float | > | int | -mcustom-fcmpgts=N | nios2_sgtsf |
| float | float | >= | int | -mcustom-fcmpges=N | nios2_sgesf |
| float | float | == | int | -mcustom-fcmpeqs=N | nios2_seqsf |
| float | float | != | int | -mcustom-fcmpnes=N | nios2_snesf |
| int | none | int to float | float | -mcustom-floatis=N | floatsisf2 |
| unsigned | none | unsigned to float | float | -mcustom-floatus=N | floatunssisf2 |
| float | none | float to int | int | -mcustom-fixsi=N | fixsfsi2 |
| float | none | float to unsigned | unsigned | -mcustom-fixsu=N | fixunssfsi2 |
The -mcustom-fpu-cfg=60-1 option is equivalent to setting
-mcustom-fmuls=252
-mcustom-fadds=253
-mcustom-fsubs=254
-fsingle-precision-constant
The -mcustom-fpu-cfg=60-2 option is equivalent to setting
-mcustom-fmuls=252
-mcustom-fadds=253
-mcustom-fsubs=254
-mcustom-fdivs=255
-fsingle-precision-constant
However, be aware that these two "60" options are applied late when scanning the command line. The consequence is that you cannot disable -fsingle-precision-constant if either of these options is present.
The "60" in the options' names refers to the first version of the Nios dev kit that supports them (6.0).
