| 1 | /* |
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| 2 | * Copyright 2010 INRIA Saclay |
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| 3 | * |
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| 4 | * Use of this software is governed by the MIT license |
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| 5 | * |
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| 6 | * Written by Sven Verdoolaege, |
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| 7 | * INRIA Saclay - Ile-de-France, Parc Club Orsay Universite, |
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| 8 | * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France |
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| 9 | */ |
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| 10 | |
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| 11 | #include "isl_union_macro.h" |
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| 12 | |
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| 13 | /* Subtract "u2" from "u1" and return the result. |
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| 14 | * |
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| 15 | * If the base expressions have a default zero value, then |
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| 16 | * reuse isl_union_*_add to ensure the result |
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| 17 | * is computed on the union of the domains of "u1" and "u2". |
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| 18 | * Otherwise, compute the result directly on their shared domain. |
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| 19 | */ |
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| 20 | __isl_give UNION *FN(UNION,sub)(__isl_take UNION *u1, __isl_take UNION *u2) |
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| 21 | { |
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| 22 | #if DEFAULT_IS_ZERO |
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| 23 | return FN(UNION,add)(u1, FN(UNION,neg)(u2)); |
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| 24 | #else |
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| 25 | return FN(UNION,match_bin_op)(u1, u2, fn: &FN(PART,sub)); |
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| 26 | #endif |
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| 27 | } |
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| 28 | |
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