René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Slot limitations also depends with instructions with immediate values.","articleBody":"Hello @robcasloz \r\n\r\nWe would like your help in tackling a scenario where slot limitation also depends with instructions with immediates.\r\n\r\nPlease have a look below,\r\nThe VLIW target that we are trying to experiment can access immediates only through references where 1 packet can access three 8 bit immediate values.\r\n\r\nConsider the following scenarios,\r\n\r\nScenario 1\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 20,\r\n      %r0 = ADDri %r0, 20,\r\n      }\r\nPlease check the allocation slots below,\r\n![Scenario_1](https://user-images.githubusercontent.com/59991469/109495547-71180180-7ab5-11eb-97e9-b91984029f2b.PNG)\r\n\r\nScenario 2\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 20,\r\n      %r0 = ADDri %r0, 20,\r\n\t  %r2 = SUBri %r2, 20,\r\n      }\r\nPlease check the allocation slots below,\r\n![Scenario_2](https://user-images.githubusercontent.com/59991469/109495604-83923b00-7ab5-11eb-944b-eb0de2b080ff.PNG)\r\n\r\nScenario 3\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 20,\r\n\t  %r3 = ADD %r3, %r5,\r\n\t  %r4 = SUB %r4, %r5,\r\n      }\r\nPlease check the allocation slots below,\r\n![Scenario_3](https://user-images.githubusercontent.com/59991469/109495652-90169380-7ab5-11eb-94f7-3d5c2cef0c88.PNG)\r\n\r\nScenario 4\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 20,\r\n      %r0 = ADDri %r0, 40,\r\n\t  %r2 = SUBri %r2, 60,\r\n      }\r\nPlease check the allocation slots below,\r\n![Scenario_4](https://user-images.githubusercontent.com/59991469/109495678-9ad12880-7ab5-11eb-8a92-d8b6e8239dd0.PNG)\r\n\t  \r\nScenario 5\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 1200,\r\n      %r4 = ADDri %r4, 14,\r\n    }\r\nPlease check the allocation slots below,\r\n![Scenario_5](https://user-images.githubusercontent.com/59991469/109495696-a1f83680-7ab5-11eb-97c4-44c13259fac0.PNG)\r\n \r\nScenario 6\r\nBUNDLE {\r\n      %r1 = ADDri %r1, 1200,\r\n      %r0 = ADDri %r0, 4800,\r\n      %r4 = ADDri %r4, 1,\r\n    }\r\nPlease check the allocation slots below,\r\n![Scenario_6](https://user-images.githubusercontent.com/59991469/109495815-c8b66d00-7ab5-11eb-9a86-73098b5c9acf.PNG)\r\n \r\nWe are facing issue with Scenario 6, as \"1200\" decimal is converted to two 8 byte decimal value. And considering scenario 6, we are accessing five 8 bit immediate values.\r\n\r\nCan you please provide suggestion on how to make Unison aware of such restrictions so that such bundles are not generated.\r\nIn our case ADD instr has ALU_ALL slots, thus added in single bundle.\r\n\r\nRegards,\r\nUtkarsh","author":{"url":"https://github.com/utkarshyen","@type":"Person","name":"utkarshyen"},"datePublished":"2021-03-01T12:15:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/55/unison/issues/55"}