FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/libiram/bcopy_words.S @ 932:79657f9c5772
compal-flash-boot-for-fc created
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
---|---|
date | Sat, 31 Oct 2015 03:04:03 +0000 |
parents | cbc49d533b7d |
children |
rev | line source |
---|---|
860
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
1 /* |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
2 * bcopy_aligned_words() takes the same arguments as BSD bcopy(), |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
3 * but requires both addresses and the count to be 32-bit word-aligned, |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
4 * and assumes that the source and destination memory regions |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
5 * do not overlap. Furthermore, the count is expected to be non-zero. |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
6 * |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
7 * Arguments: |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
8 * |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
9 * R0: source address (word-aligned) |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
10 * R1: destination address (ditto) |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
11 * R2: byte count (must be a multiple of 4) |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
12 */ |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
13 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
14 .text |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
15 .code 32 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
16 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
17 .globl bcopy_aligned_words |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
18 bcopy_aligned_words: |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
19 1: ldr r3, [r0], #4 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
20 str r3, [r1], #4 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
21 subs r2, r2, #4 |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
22 bhi 1b |
cbc49d533b7d
gsm-fw: new implementation of bzero() and some specialized bcopy variants
Space Falcon <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
23 bx lr |