diff options
Diffstat (limited to '')
| -rw-r--r-- | web/server/h2o/libh2o/deps/picotls/deps/cifra/src/arm/memcpy.s | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/picotls/deps/cifra/src/arm/memcpy.s b/web/server/h2o/libh2o/deps/picotls/deps/cifra/src/arm/memcpy.s new file mode 100644 index 00000000..63406fe5 --- /dev/null +++ b/web/server/h2o/libh2o/deps/picotls/deps/cifra/src/arm/memcpy.s @@ -0,0 +1,49 @@ + .text + .syntax unified + .global memcpy + .func memcpy + .thumb_func + +memcpy: + /* on entry + * r0 = targ + * r1 = src + * r2 = len (bytes) + * on exit + * r0 = targ (unchanged) + */ + push {r0, r4, lr} + + /* If targ or src are unaligned, drop to byte + * processing. */ + mov r3, r0 + movs r4, #3 + orrs r3, r1 + ands r3, r4 + bne L_bytewise + + /* Process words */ +L_wordwise: + cmp r2, #4 + blo L_bytewise + ldr r4, [r1] + adds r1, #4 + str r4, [r0] + adds r0, #4 + subs r2, #4 + b L_wordwise + + /* Process bytes */ +L_bytewise: + cmp r2, #0 + beq L_fin + ldrb r4, [r1] + adds r1, #1 + strb r4, [r0] + adds r0, #1 + subs r2, #1 + b L_bytewise + +L_fin: + pop {r0, r4, pc} + .endfunc |