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64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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* Copyright 2012 Ecole Normale Superieure
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*
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* Use of this software is governed by the MIT license
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*
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* Written by Sven Verdoolaege,
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* Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
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*/
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#include <isl/ctx.h>
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#include <isl/space.h>
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#include <isl_multi_macro.h>
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/* Given two multi expressions, "multi1"
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*
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* [A1 A2] -> [B1 B2]
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*
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* where A2 starts at position "in_pos" and B2 starts at position "out_pos",
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* and "multi2"
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*
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* [C] -> [D]
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*
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* return the multi expression
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*
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* [A1 C A2] -> [B1 D B2]
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*
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* We first insert input dimensions to obtain
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*
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* [A1 C A2] -> [B1 B2]
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*
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* and
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*
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* [A1 C A2] -> [D]
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*
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* and then apply range_splice.
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*/
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__isl_give MULTI(BASE) *FN(MULTI(BASE),splice)(
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__isl_take MULTI(BASE) *multi1, unsigned in_pos, unsigned out_pos,
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__isl_take MULTI(BASE) *multi2)
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{
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isl_size n_in1;
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isl_size n_in2;
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n_in1 = FN(MULTI(BASE),dim)(multi1, isl_dim_in);
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n_in2 = FN(MULTI(BASE),dim)(multi2, isl_dim_in);
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if (n_in1 < 0 || n_in2 < 0)
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goto error;
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if (FN(MULTI(BASE),check_range)(multi1, isl_dim_in, in_pos, 0) < 0)
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goto error;
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multi1 = FN(MULTI(BASE),insert_dims)(multi1, isl_dim_in, in_pos, n_in2);
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multi2 = FN(MULTI(BASE),insert_dims)(multi2, isl_dim_in, n_in2,
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n_in1 - in_pos);
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multi2 = FN(MULTI(BASE),insert_dims)(multi2, isl_dim_in, 0, in_pos);
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return FN(MULTI(BASE),range_splice)(multi1, out_pos, multi2);
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error:
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FN(MULTI(BASE),free)(multi1);
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FN(MULTI(BASE),free)(multi2);
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return NULL;
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}
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