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view lphobos/typeinfo1/ti_cfloat.d @ 1275:bedf0bfb8fdb
Implement first D-specific optimization pass: -simplify-drtcalls.
It uses the machinery of the standard -simplify-libcalls pass, but optimizes
calls to the D runtime instead of calls to C libraries.
At the moment, these optimizations are implemented by this pass:
- Avoid the runtime call for `arr.length = newlen` if it can determine that
the new length isn't longer than the old one.
- Ditto for `cast(T[]) arr` if it will clearly always succeed.
(e.g. if the length of the original array is zero, or if the old element
size is a multiple of the new element size)
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Tue, 28 Apr 2009 21:58:06 +0200 |
parents | 79c9ac745fbc |
children |
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// cfloat module typeinfo1.ti_cfloat; class TypeInfo_q : TypeInfo { char[] toString() { return "cfloat"; } hash_t getHash(void *p) { return (cast(uint *)p)[0] + (cast(uint *)p)[1]; } static int _equals(cfloat f1, cfloat f2) { return f1 == f2; } static int _compare(cfloat f1, cfloat f2) { int result; if (f1.re < f2.re) result = -1; else if (f1.re > f2.re) result = 1; else if (f1.im < f2.im) result = -1; else if (f1.im > f2.im) result = 1; else result = 0; return result; } int equals(void *p1, void *p2) { return _equals(*cast(cfloat *)p1, *cast(cfloat *)p2); } int compare(void *p1, void *p2) { return _compare(*cast(cfloat *)p1, *cast(cfloat *)p2); } size_t tsize() { return cfloat.sizeof; } void swap(void *p1, void *p2) { cfloat t; t = *cast(cfloat *)p1; *cast(cfloat *)p1 = *cast(cfloat *)p2; *cast(cfloat *)p2 = t; } void[] init() { static cfloat r; return (cast(cfloat *)&r)[0 .. 1]; } }