[問題]請問哪個是x*7 最快的implement方法
最近被問到這題: 以下哪一個是x*7最快的implement方法
(1)x+x+x+x+x+x+x
(2)x*7
(3)x<<3-x
我覺得是(3),但不太確定,請問各位高手有甚麼想法,謝謝。
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08/18 15:00, , 1F
08/18 15:00, 1F
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08/18 15:12, , 2F
08/18 15:12, 2F
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08/18 15:31, , 3F
08/18 15:31, 3F
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08/18 15:33, , 4F
08/18 15:33, 4F
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08/18 15:39, , 5F
08/18 15:39, 5F
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08/18 16:23, , 6F
08/18 16:23, 6F
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08/18 16:51, , 7F
08/18 16:51, 7F
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08/18 17:21, , 8F
08/18 17:21, 8F
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08/18 17:31, , 9F
08/18 17:31, 9F
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08/18 17:31, , 10F
08/18 17:31, 10F
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08/18 18:21, , 11F
08/18 18:21, 11F
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08/18 18:48, , 12F
08/18 18:48, 12F
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08/18 19:02, , 13F
08/18 19:02, 13F
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08/18 19:13, , 14F
08/18 19:13, 14F
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08/18 19:13, , 15F
08/18 19:13, 15F
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08/18 19:17, , 16F
08/18 19:17, 16F
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08/18 19:52, , 17F
08/18 19:52, 17F
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08/18 19:54, , 18F
08/18 19:54, 18F
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08/18 19:54, , 19F
08/18 19:54, 19F
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08/18 20:10, , 20F
08/18 20:10, 20F
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08/18 20:53, , 21F
08/18 20:53, 21F
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08/18 21:00, , 22F
08/18 21:00, 22F
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08/18 22:05, , 23F
08/18 22:05, 23F
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08/19 04:25, , 24F
08/19 04:25, 24F
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08/19 04:25, , 25F
08/19 04:25, 25F
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08/19 05:55, , 26F
08/19 05:55, 26F
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08/19 06:02, , 27F
08/19 06:02, 27F
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08/19 06:07, , 28F
08/19 06:07, 28F
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08/19 09:56, , 29F
08/19 09:56, 29F
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08/19 11:48, , 30F
08/19 11:48, 30F
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08/19 14:59, , 31F
08/19 14:59, 31F
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08/19 23:38, , 32F
08/19 23:38, 32F
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08/20 11:22, , 33F
08/20 11:22, 33F
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08/21 12:51, , 34F
08/21 12:51, 34F
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08/24 02:21, , 35F
08/24 02:21, 35F
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08/24 14:54, , 36F
08/24 14:54, 36F
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08/25 02:03, , 37F
08/25 02:03, 37F
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08/25 13:00, , 38F
08/25 13:00, 38F
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08/25 13:00, , 39F
08/25 13:00, 39F
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08/29 12:17, , 40F
08/29 12:17, 40F
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08/29 13:27, , 41F
08/29 13:27, 41F
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08/29 13:28, , 42F
08/29 13:28, 42F