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qemu/bswap: Add const_le64() 

Gcc requires constant versions of cpu_to_le* calls.

Add a 64 bit version.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Gregory Price <gregory.price@memverge.com>
Tested-by: Gregory Price <gregory.price@memverge.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Message-Id: <20230206172816.8201-9-Jonathan.Cameron@huawei.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Ira Weiny 2023-02-06 17:28:14 +00:00 committed by Michael S. Tsirkin
parent 21063bcee8
commit 845d80a8c7
1 changed files with 11 additions and 1 deletions
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12
include/qemu/bswap.h
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@ -125,11 +125,20 @@ CPU_CONVERT(le, 32, uint32_t)
CPU_CONVERT(le, 64, uint64_t)
/*
* Same as cpu_to_le{16,32}, except that gcc will figure the result is
* Same as cpu_to_le{16,32,64}, except that gcc will figure the result is
* a compile-time constant if you pass in a constant. So this can be
* 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) | \
@ -139,6 +148,7 @@ 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