Halide
HexagonOptimize.h
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1 #ifndef HALIDE_IR_HEXAGON_OPTIMIZE_H
2 #define HALIDE_IR_HEXAGON_OPTIMIZE_H
3 
4 /** \file
5  * Tools for optimizing IR for Hexagon.
6  */
7 
8 #include "Expr.h"
9 
10 namespace Halide {
11 
12 struct Target;
13 
14 namespace Internal {
15 
16 /** Replace indirect and other loads with simple loads + vlut
17  * calls. */
18 Stmt optimize_hexagon_shuffles(const Stmt &s, int lut_alignment);
19 
20 /* Generate vscatter-vgather instructions on Hexagon using VTCM memory.
21  * The pass should be run before generating shuffles.
22  * Some expressions which generate vscatter-vgathers are:
23  * 1. out(x) = lut(foo(x)) -> vgather
24  * 2. out(idx(x)) = foo(x) -> vscatter */
25 Stmt scatter_gather_generator(Stmt s);
26 
27 /** Hexagon deinterleaves when performing widening operations, and
28  * interleaves when performing narrowing operations. This pass
29  * rewrites widenings/narrowings to be explicit in the IR, and
30  * attempts to simplify away most of the
31  * interleaving/deinterleaving. */
32 Stmt optimize_hexagon_instructions(Stmt s, const Target &t);
33 
34 /** Generate deinterleave or interleave operations, operating on
35  * groups of vectors at a time. */
36 //@{
37 Expr native_deinterleave(const Expr &x);
38 Expr native_interleave(const Expr &x);
39 bool is_native_deinterleave(const Expr &x);
40 bool is_native_interleave(const Expr &x);
41 //@}
42 
43 std::string type_suffix(Type type, bool signed_variants = true);
44 
45 std::string type_suffix(const Expr &a, bool signed_variants = true);
46 
47 std::string type_suffix(const Expr &a, const Expr &b, bool signed_variants = true);
48 
49 std::string type_suffix(const std::vector<Expr> &ops, bool signed_variants = true);
50 
51 } // namespace Internal
52 } // namespace Halide
53 
54 #endif
Halide::Internal::optimize_hexagon_instructions
Stmt optimize_hexagon_instructions(Stmt s, const Target &t)
Hexagon deinterleaves when performing widening operations, and interleaves when performing narrowing ...
Halide::Internal::native_interleave
Expr native_interleave(const Expr &x)
Halide
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
Definition: AbstractGenerator.h:19
Halide::LinkageType::Internal
@ Internal
Not visible externally, similar to 'static' linkage in C.
Halide::Internal::is_native_interleave
bool is_native_interleave(const Expr &x)
Halide::Internal::optimize_hexagon_shuffles
Stmt optimize_hexagon_shuffles(const Stmt &s, int lut_alignment)
Replace indirect and other loads with simple loads + vlut calls.
Halide::Internal::scatter_gather_generator
Stmt scatter_gather_generator(Stmt s)
Halide::Internal::is_native_deinterleave
bool is_native_deinterleave(const Expr &x)
Expr.h
Halide::Internal::native_deinterleave
Expr native_deinterleave(const Expr &x)
Generate deinterleave or interleave operations, operating on groups of vectors at a time.
Halide::Internal::type_suffix
std::string type_suffix(Type type, bool signed_variants=true)