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| author | Scott Duplichan <scott@notabs.org> | 2014-11-14 10:24:08 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2014-11-14 10:24:08 +0000 |
| commit | faba4a14de81d4f20aa07336e7433835edd760f8 (patch) | |
| tree | c384d3d45b2dab1f2a7e0d848676ddbf8f188970 /OvmfPkg | |
| parent | 75f8e3aaff4d77ec2a04c14633d63b67c651edda (diff) | |
| download | edk2-platforms-faba4a14de81d4f20aa07336e7433835edd760f8.tar.xz | |
OvmfPkg: VirtioScsiDxe: drop 64-bit shift in PopulateRequest() (VS2010)
"Lun" has type UINT64 in this function. The result of the expression
(UINT8) ((Lun >> 8) | 0x40)
depends only on bits [15:8] of "Lun", therefore we can cast "Lun" to
UINT32 before shifting it.
This eliminates an intrinsic when building with VS2010 for Ia32 / NOOPT.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Scott Duplichan <scott@notabs.org>
[lersek@redhat.com: added commit message]
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Build-tested-by: Scott Duplichan <scott@notabs.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16386 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/VirtioScsiDxe/VirtioScsi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c index 6b8ea601cd..2cb3f43bb0 100644 --- a/OvmfPkg/VirtioScsiDxe/VirtioScsi.c +++ b/OvmfPkg/VirtioScsiDxe/VirtioScsi.c @@ -253,7 +253,7 @@ PopulateRequest ( //
Request->Lun[0] = 1;
Request->Lun[1] = (UINT8) Target;
- Request->Lun[2] = (UINT8) ((Lun >> 8) | 0x40);
+ Request->Lun[2] = (UINT8) (((UINT32)Lun >> 8) | 0x40);
Request->Lun[3] = (UINT8) Lun;
//
|