AST-33: bit-testing of words #239
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nomeata
approved these changes
Mar 15, 2019
src/compile.ml
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| | "btst64" -> compile_kernel_as SR.UnboxedInt64 ( | ||
| let (set_b, get_b) = new_local64 env "b" | ||
| in set_b ^^ compile_const_64 1L ^^ get_b ^^ G.i (Binary (Wasm.Values.I64 I64Op.Shl)) ^^ | ||
| G.i (Binary (Wasm.Values.I64 I64Op.And))) |
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At some point I think it would make sense to move the arguments to compile_kernel_as out of compile_exp (which is a pretty central function, and not great if it grows too big) and move them into functions in some appropriate module NumericOps. Same with probably much other code that is currently spread in the AST-related part of the file. But this is not a regression in this PR, so no need to do it here.
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Yes, I did some of these in (the latter part of) #245, ideally all of these operations should be one-liners. The moved kernels are UnboxedSmallWord-related, we can move the others too, as need arises.
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AST-63 calls for these
btstWord*operations.AST-33 deals with primitive datatypes and their ops.
Do we need further:
bsetWord*,bclrWord*? They are not primitives in WASM, but are non-trivial to get right, esp. forWord8/16. Please comment here or in the AST.