diff options
Diffstat (limited to 'src/example/strcpy.s')
| -rw-r--r-- | src/example/strcpy.s | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/example/strcpy.s b/src/example/strcpy.s new file mode 100644 index 0000000..109112d --- /dev/null +++ b/src/example/strcpy.s @@ -0,0 +1,20 @@ + .text + .balign 4 + .global strcpy + # char* strcpy(char *dst, const char* src) +strcpy: + mv a2, a0 # Copy dst + li t0, -1 # Infinite AVL +loop: + vsetvli x0, t0, e8, m8, ta, ma # Max length vectors of bytes + vle8ff.v v8, (a1) # Get src bytes + csrr t1, vl # Get number of bytes fetched + vmseq.vi v1, v8, 0 # Flag zero bytes + vfirst.m a3, v1 # Zero found? + add a1, a1, t1 # Bump pointer + vmsif.m v0, v1 # Set mask up to and including zero byte. + vse8.v v8, (a2), v0.t # Write out bytes + add a2, a2, t1 # Bump pointer + bltz a3, loop # Zero byte not found, so loop + + ret |