From: Michael Brown <mcb30@ipxe.org>
Date: Tue, 24 Nov 2015 17:28:23 +0000 (+0000)
Subject: [bitops] Provide BIT_QWORD_PTR()
X-Git-Tag: v1.20.1~658
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fcd4223cc5bce800bf253ab34cbf2e996c9958e;p=thirdparty%2Fipxe.git

[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>
---

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 )					      \
 	( {								      \