diff mbox series

[v2,1/8] qemu/bswap: Add const_le64()

Message ID 20221221-ira-cxl-events-2022-11-17-v2-1-2ce2ecc06219@intel.com (mailing list archive)
State New, archived
Headers show
Series QEMU CXL Provide mock CXL events and irq support | expand

Commit Message

Ira Weiny Dec. 22, 2022, 4:24 a.m. UTC 
Gcc requires constant versions of cpu_to_le* calls.

Add a 64 bit version.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes from RFC:
	Peter
		Change order of the definitions, 64-32-16
---
 include/qemu/bswap.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
index 346d05f2aab3..e1eca22f2548 100644
--- a/include/qemu/bswap.h
+++ b/include/qemu/bswap.h
@@ -187,6 +187,15 @@  CPU_CONVERT(le, 64, uint64_t)
  * used to initialize static variables.
  */
 #if HOST_BIG_ENDIAN
+# define const_le64(_x)                          \
+    ((((_x) & 0x00000000000000ffU) << 56) |      \
+     (((_x) & 0x000000000000ff00U) << 40) |      \
+     (((_x) & 0x0000000000ff0000U) << 24) |      \
+     (((_x) & 0x00000000ff000000U) <<  8) |      \
+     (((_x) & 0x000000ff00000000U) >>  8) |      \
+     (((_x) & 0x0000ff0000000000U) >> 24) |      \
+     (((_x) & 0x00ff000000000000U) >> 40) |      \
+     (((_x) & 0xff00000000000000U) >> 56))
 # define const_le32(_x)                          \
     ((((_x) & 0x000000ffU) << 24) |              \
      (((_x) & 0x0000ff00U) <<  8) |              \
@@ -196,6 +205,7 @@  CPU_CONVERT(le, 64, uint64_t)
     ((((_x) & 0x00ff) << 8) |                    \
      (((_x) & 0xff00) >> 8))
 #else
+# define const_le64(_x) (_x)
 # define const_le32(_x) (_x)
 # define const_le16(_x) (_x)
 #endif