FreeCalypso > hg > freecalypso-sw
view gsm-fw/libiram/bcopy_words.S @ 875:dab341e172de
fc-shell: sysprim sending (sp command) implemented
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Sat, 30 May 2015 07:41:23 +0000 |
parents | cbc49d533b7d |
children |
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/* * bcopy_aligned_words() takes the same arguments as BSD bcopy(), * but requires both addresses and the count to be 32-bit word-aligned, * and assumes that the source and destination memory regions * do not overlap. Furthermore, the count is expected to be non-zero. * * Arguments: * * R0: source address (word-aligned) * R1: destination address (ditto) * R2: byte count (must be a multiple of 4) */ .text .code 32 .globl bcopy_aligned_words bcopy_aligned_words: 1: ldr r3, [r0], #4 str r3, [r1], #4 subs r2, r2, #4 bhi 1b bx lr