Use representation types for expressions and shapes #455
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Fix true / false patterns
It accidentally consisted of zeros instead of -1
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GHC 8.8 doesn't believe anymore that the type family |
&& and || are now defined in terms of if-then-else &&! and ||! are strict variants of them, which do not short circuit
tomsmeding
reviewed
May 13, 2020
src/Data/Array/Accelerate/Type.hs
Outdated
| type Tup8 a b c d e f g h = (((((((((), a), b), c), d), e), f), g), h) | ||
| type Tup9 a b c d e f g h i = ((((((((((), a), b), c), d), e), f), g), h), i) | ||
| type Tup16 a b c d e f g h | ||
| i j k l m n o p = ((((((((((((((((((), a), b), c), d), e), f), g), h), i), j), k), l), m), n), o), p)) |
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I believe there is a redundant pair of outer parentheses here :)
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Thanks, good catch!
8 tasks
Previously defined in accelerate-llvm
This may duplicate work
8 tasks
tmcdonell
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Jun 5, 2020
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Description
Before this PR, the types of expressions would refer to surface types. This PR changes that: internally the type now regards the representation type, similar to what I did previously on Acc in #449. A quick summary of the changes:
Exp,PreOpenExpfromAST.hsregards representation types.Smart.hs, we introducedSmartExpto capture the recursion. Its type argument regards representation types. To hide this change to the user, we wrap this innewtype Exp t = Exp (SmartExp (EltRepr t)).PairandNil.Vec n t) are now more explicit in the AST. Creating vectors or extracting data from them is achieved by converting the vector from/to a tuple. This is done usingVecPackandVecUnpack.V2_,V3_,V4_,V8_andV16_Pattern.hsElt (Vec n t)for different single types, we have now have only one instance. We use type classVecEltto denote which single types can be stored in a Vec.Complexcan be used on all types instead of only floating point numbers.Motivation and context
This change should make the internals of Accelerate easier, as it is easier to reason in terms of representation types, and in terms of variables of a scalar type.
How has this been tested?
The tests are all passing :)
Types of changes
Checklist: