Add std.complex.coshisinh and remove uses of creal math.#5698
Add std.complex.coshisinh and remove uses of creal math.#5698ibuclaw wants to merge 1 commit intodlang:masterfrom
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std/complex.d
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| Complex!real coshisinh(real y) @safe pure nothrow @nogc | ||
| { | ||
| import std.math : cosh, sinh; |
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Is this the most efficient way of performing the calculation? I'm only asking because the one in std.math is implemented differently, using exp()/expm1().
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std.math.coshisinh just inlines the cosh+sinh implementations.
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Yes, but the purpose of that seems to be to reduce two exp() calls to one. Does the compiler perform the same optimisation in your case?
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Two calls would be made. One for cosh, one for sinh.
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std.math.coshisinh makes only one exp call. In fact, that seems to be its raison d'être.
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Added one fast path. I also noticed there could be a few more functions added here. log, exp and tan are some of the notable that should be easy to add, but missing. |
@ibuclaw do you intend to add them in this PR, or is it now good to go? |
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I can add other functions in latter PRs. I should alzo add another unittest for |
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| @safe pure nothrow @nogc unittest |
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How about making this a publicly documented example?
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| Note: | ||
| $(D coshisinh) is included here for convenience and for easy migration of code | ||
| that uses $(REF _coshisinh, std,math). |
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What is the motivation behind the move?
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Are we deprecating complex real?
| static import std.math; | ||
| if (std.math.fabs(y) <= 0.5) | ||
| return Complex!real(std.math.cosh(y), std.math.sinh(y)); | ||
| else |
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andralex
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This shouldn't be blocked on me as I'm not an expert.
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cc math people @9il @klickverbot @WalterBright |
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Small addition for dlang/dmd#7081
Everything else looks like just deleting support code from phobos.