FreeCalypso > hg > freecalypso-citrine
view libiram/bcopy_chunk32.S @ 41:d1d1afdc29b5
configs/fcdev3b-std added
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 17 May 2017 06:02:03 +0000 |
parents | 75a11d740a02 |
children |
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/* * bcopy_32byte_chunks() takes the same arguments as BSD bcopy(), * but works on large chunks, specifically: * * - both addresses must be 32-bit word-aligned; * - the count must be a non-zero multiple of 32 bytes; * - the source and destination memory regions must not overlap. * * Arguments: * * R0: source address (word-aligned) * R1: destination address (ditto) * R2: byte count (must be a multiple of 32) */ .text .code 32 .globl bcopy_32byte_chunks bcopy_32byte_chunks: stmfd sp!, {r4-r9} 1: ldmia r0!, {r3-r9,r12} stmia r1!, {r3-r9,r12} subs r2, r2, #0x20 bhi 1b ldmfd sp!, {r4-r9} bx lr