| // Copyright 2017 The Fuchsia Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| #include "asm.h" | |
| // %rax = mempcpy(%rdi, %rsi, %rdx) | |
| ENTRY(mempcpy) | |
| mov %rdx, %rcx | |
| rep movsb // while (rcx-- > 0) *rdi++ = *rsi++; | |
| mov %rdi, %rax | |
| ret | |
| END(mempcpy) |