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| author | Michael Brown | 2015-11-24 18:28:23 +0100 |
|---|---|---|
| committer | Michael Brown | 2015-12-02 00:56:27 +0100 |
| commit | 1fcd4223cc5bce800bf253ab34cbf2e996c9958e (patch) | |
| tree | c28d80e8b35fda180c3dcc97e65fa2e2d6e89970 /src/include | |
| parent | [smsc95xx] Add driver for SMSC/Microchip LAN95xx USB Ethernet NICs (diff) | |
| download | ipxe-1fcd4223cc5bce800bf253ab34cbf2e996c9958e.tar.gz ipxe-1fcd4223cc5bce800bf253ab34cbf2e996c9958e.tar.xz ipxe-1fcd4223cc5bce800bf253ab34cbf2e996c9958e.zip | |
[bitops] Provide BIT_QWORD_PTR()
Provide BIT_QWORD_PTR() to allow for easy extraction of non-endian
fields (e.g. Infiniband GUIDs) without unnecessary byte swapping.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/bitops.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/include/ipxe/bitops.h b/src/include/ipxe/bitops.h index 2e22c1dbc..93eb663e2 100644 --- a/src/include/ipxe/bitops.h +++ b/src/include/ipxe/bitops.h @@ -212,6 +212,13 @@ typedef unsigned char pseudo_bit_t; BIT_ASSEMBLE_6 ( _ptr, QWORD_OFFSET ( _ptr, _field1 ), \ _field1, __VA_ARGS__ ) ) +#define BIT_QWORD_PTR( _ptr, _field ) \ + ( { \ + unsigned int __index = QWORD_OFFSET ( _ptr, _field ); \ + uint64_t *__ptr = &(_ptr)->u.qwords[__index]; \ + __ptr; \ + } ) + /** Extract value of named field */ #define BIT_GET64( _ptr, _field ) \ ( { \ |