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Altera_Forum
Honored Contributor
Honored ContributorString Instruction (NIOS2-UCLINUX )?
hi all ,
I want to use a string instruction（ insl,outsl) to copy a string to my IO device faster in the uClinux . would it work? the following instruction just can access 4-bytes : # define IORD(address,offset) (*(volatile unsigned*)(((address|0x80000000))+4*(offset)))# define IOWR(address,offset,value) (*(volatile unsigned*)(((address|0x80000000))+4*(offset)))=(value) void insl（unsigned port，void * addr，unsigned long count）； void outsl（unsigned port ，void * addr，unsigned long count）； thanks.2 Replies
Altera_ForumWhat is the question you want help on ?
the IORD (or similar) Macro should be defined in the appropriate header in the distriution. Are the appropriate multi-word Macros not (yet) defined ? Writing ASM instructions in GNU C ? There is a lot of documentation around. -Michael- Altera_Forum
NIOS II does not have string instructions:
http://www.altera.com/literature/hb/nios2/n2cpu_nii51017.pdf
