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| author | Richard Henderson <richard.henderson@linaro.org> | 2020-02-16 13:42:29 -0800 |
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| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-02-21 16:07:02 +0000 |
| commit | 87b74e8b6edd287ea2160caa0ebea725fa8f1ca1 (patch) | |
| tree | acbe40c42da070d88cc77e7372cc43b2a55824a3 /hw/display/omap_lcdc.c | |
| parent | 7abc8cabad977aeccbbb6e6b2026e68ab8e32c65 (diff) | |
| download | focaccia-qemu-87b74e8b6edd287ea2160caa0ebea725fa8f1ca1.tar.gz focaccia-qemu-87b74e8b6edd287ea2160caa0ebea725fa8f1ca1.zip | |
target/arm: Vectorize USHL and SSHL
These instructions shift left or right depending on the sign of the input, and 7 bits are significant to the shift. This requires several masks and selects in addition to the actual shifts to form the complete answer. That said, the operation is still a small improvement even for two 64-bit elements -- 13 vector operations instead of 2 * 7 integer operations. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200216214232.4230-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/display/omap_lcdc.c')
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