diff options
| author | Mateusz Guzik <mjg@FreeBSD.org> | 2018-05-31 09:56:02 +0000 |
|---|---|---|
| committer | Mateusz Guzik <mjg@FreeBSD.org> | 2018-05-31 09:56:02 +0000 |
| commit | 64415b8b229f42d68126c0fcd1a22dd4dc138aed (patch) | |
| tree | bc9ef9f09067d7367e4dc8036f22a75760a41481 | |
| parent | 5fd1ea0810fa7811886c51740e0758f2dd36d940 (diff) | |
Notes
| -rw-r--r-- | sys/amd64/amd64/support.S | 26 |
1 files changed, 6 insertions, 20 deletions
diff --git a/sys/amd64/amd64/support.S b/sys/amd64/amd64/support.S index d3e1c5319811..3bdaac548cc6 100644 --- a/sys/amd64/amd64/support.S +++ b/sys/amd64/amd64/support.S @@ -281,26 +281,12 @@ END(memset) */ ENTRY(pagecopy) PUSH_FRAME_POINTER - movq $-PAGE_SIZE,%rax - movq %rax,%rdx - subq %rax,%rdi - subq %rax,%rsi -1: - prefetchnta (%rdi,%rax) - addq $64,%rax - jne 1b -2: - movq (%rdi,%rdx),%rax - movnti %rax,(%rsi,%rdx) - movq 8(%rdi,%rdx),%rax - movnti %rax,8(%rsi,%rdx) - movq 16(%rdi,%rdx),%rax - movnti %rax,16(%rsi,%rdx) - movq 24(%rdi,%rdx),%rax - movnti %rax,24(%rsi,%rdx) - addq $32,%rdx - jne 2b - sfence + movq $PAGE_SIZE/8,%rcx + movq %rdi,%r9 + movq %rsi,%rdi + movq %r9,%rsi + rep + movsq POP_FRAME_POINTER ret END(pagecopy) |