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| author | Peter Maydell | 2016-06-17 16:23:45 +0200 |
|---|---|---|
| committer | Peter Maydell | 2016-06-17 16:23:51 +0200 |
| commit | b355438de52d0782983bf4bdc47936189a0c988b (patch) | |
| tree | 2a93d70d0440c5506d1b231af1d930672d4d11a9 /target-arm/cpu.h | |
| parent | migration: Define VMSTATE_UINT64_2DARRAY (diff) | |
| download | qemu-b355438de52d0782983bf4bdc47936189a0c988b.tar.gz qemu-b355438de52d0782983bf4bdc47936189a0c988b.tar.xz qemu-b355438de52d0782983bf4bdc47936189a0c988b.zip | |
bitops.h: Implement half-shuffle and half-unshuffle ops
A half-shuffle operation takes a word with zeros in the high half:
0000 0000 0000 0000 ABCD EFGH IJKL MNOP
and spreads the bits out so they are in every other bit of the word:
0A0B 0C0D 0E0F 0G0H 0I0J 0K0L 0M0N 0O0P
A half-unshuffle performs the reverse operation.
Provide functions in bitops.h which implement these operations
for 32-bit and 64-bit inputs, and add tests for them.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
Tested-by: Shannon Zhao <shannon.zhao@linaro.org>
Message-id: 1465915112-29272-3-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-arm/cpu.h')
0 files changed, 0 insertions, 0 deletions