[WebAssembly] Remove a TODO comment which is no longer needed. NFC.
[oota-llvm.git] / lib / Target / WebAssembly / WebAssemblyInstrMemory.td
1 // WebAssemblyInstrMemory.td-WebAssembly Memory codegen support -*- tablegen -*-
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief WebAssembly Memory operand code-gen constructs.
12 ///
13 //===----------------------------------------------------------------------===//
14
15 // FIXME:
16 //  - HasAddr64
17 //  - WebAssemblyTargetLowering::isLegalAddressingMode
18 //  - WebAssemblyTargetLowering having to do with atomics
19 //  - Each has optional alignment and immediate byte offset.
20
21 // WebAssembly has i8/i16/i32/i64/f32/f64 memory types, but doesn't have i8/i16
22 // local types. These memory-only types instead zero- or sign-extend into local
23 // types when loading, and truncate when storing.
24
25 // Basic load.
26 def LOAD_I32_ : I<(outs I32:$dst), (ins I32:$addr),
27                   [(set I32:$dst, (load I32:$addr))]>;
28 def LOAD_I64_ : I<(outs I64:$dst), (ins I32:$addr),
29                   [(set I64:$dst, (load I32:$addr))]>;
30 def LOAD_F32_ : I<(outs F32:$dst), (ins I32:$addr),
31                   [(set F32:$dst, (load I32:$addr))]>;
32 def LOAD_F64_ : I<(outs F64:$dst), (ins I32:$addr),
33                   [(set F64:$dst, (load I32:$addr))]>;
34
35 // Extending load.
36 def LOAD_S_i8_I32_  : I<(outs I32:$dst), (ins I32:$addr),
37                         [(set I32:$dst, (sextloadi8 I32:$addr))]>;
38 def LOAD_U_i8_I32_  : I<(outs I32:$dst), (ins I32:$addr),
39                         [(set I32:$dst, (zextloadi8 I32:$addr))]>;
40 def LOAD_S_i16_I32_ : I<(outs I32:$dst), (ins I32:$addr),
41                         [(set I32:$dst, (sextloadi16 I32:$addr))]>;
42 def LOAD_U_i16_I32_ : I<(outs I32:$dst), (ins I32:$addr),
43                         [(set I32:$dst, (zextloadi16 I32:$addr))]>;
44 def LOAD_S_i8_I64_  : I<(outs I64:$dst), (ins I32:$addr),
45                         [(set I64:$dst, (sextloadi8 I32:$addr))]>;
46 def LOAD_U_i8_I64_  : I<(outs I64:$dst), (ins I32:$addr),
47                         [(set I64:$dst, (zextloadi8 I32:$addr))]>;
48 def LOAD_S_i16_I64_ : I<(outs I64:$dst), (ins I32:$addr),
49                         [(set I64:$dst, (sextloadi16 I32:$addr))]>;
50 def LOAD_U_i16_I64_ : I<(outs I64:$dst), (ins I32:$addr),
51                         [(set I64:$dst, (zextloadi16 I32:$addr))]>;
52 def LOAD_S_I32_I64_ : I<(outs I64:$dst), (ins I32:$addr),
53                         [(set I64:$dst, (sextloadi32 I32:$addr))]>;
54 def LOAD_U_I32_I64_ : I<(outs I64:$dst), (ins I32:$addr),
55                         [(set I64:$dst, (zextloadi32 I32:$addr))]>;
56
57 // "Don't care" extending load become zero-extending load.
58 def : Pat<(i32 (extloadi8 I32:$addr)),  (LOAD_U_i8_I32_ $addr)>;
59 def : Pat<(i32 (extloadi16 I32:$addr)), (LOAD_U_i16_I32_ $addr)>;
60 def : Pat<(i64 (extloadi8 I32:$addr)),  (LOAD_U_i8_I64_ $addr)>;
61 def : Pat<(i64 (extloadi16 I32:$addr)), (LOAD_U_i16_I64_ $addr)>;
62 def : Pat<(i64 (extloadi32 I32:$addr)), (LOAD_U_I32_I64_ $addr)>;
63
64 // Basic store.
65 // Note: WebAssembly inverts SelectionDAG's usual operand order.
66 def STORE_I32_  : I<(outs), (ins I32:$addr, I32:$val),
67                     [(store i32:$val, I32:$addr)]>;
68 def STORE_I64_  : I<(outs), (ins I32:$addr, I64:$val),
69                     [(store i64:$val, I32:$addr)]>;
70 def STORE_F32_  : I<(outs), (ins I32:$addr, F32:$val),
71                     [(store f32:$val, I32:$addr)]>;
72 def STORE_F64_  : I<(outs), (ins I32:$addr, F64:$val),
73                     [(store f64:$val, I32:$addr)]>;
74
75 // Truncating store.
76 def STORE_i8_I32  : I<(outs), (ins I32:$addr, I32:$val),
77                       [(truncstorei8 I32:$val, I32:$addr)]>;
78 def STORE_i16_I32 : I<(outs), (ins I32:$addr, I32:$val),
79                       [(truncstorei16 I32:$val, I32:$addr)]>;
80 def STORE_i8_I64  : I<(outs), (ins I32:$addr, I64:$val),
81                       [(truncstorei8 I64:$val, I32:$addr)]>;
82 def STORE_i16_I64 : I<(outs), (ins I32:$addr, I64:$val),
83                       [(truncstorei16 I64:$val, I32:$addr)]>;
84 def STORE_I32_I64 : I<(outs), (ins I32:$addr, I64:$val),
85                       [(truncstorei32 I64:$val, I32:$addr)]>;
86
87 // Page size.
88 def page_size_I32 : I<(outs I32:$dst), (ins),
89                       [(set I32:$dst, (int_wasm_page_size))]>,
90                     Requires<[HasAddr32]>;
91 def page_size_I64 : I<(outs I64:$dst), (ins),
92                       [(set I64:$dst, (int_wasm_page_size))]>,
93                     Requires<[HasAddr64]>;
94
95 // Memory size.
96 def memory_size_I32 : I<(outs I32:$dst), (ins),
97                         [(set I32:$dst, (int_wasm_memory_size))]>,
98                       Requires<[HasAddr32]>;
99 def memory_size_I64 : I<(outs I64:$dst), (ins),
100                         [(set I64:$dst, (int_wasm_memory_size))]>,
101                       Requires<[HasAddr64]>;
102
103 // Resize memory.
104 def resize_memory_I32 : I<(outs), (ins I32:$delta),
105                           [(int_wasm_resize_memory I32:$delta)]>,
106                         Requires<[HasAddr32]>;
107 def resize_memory_I64 : I<(outs), (ins I64:$delta),
108                           [(int_wasm_resize_memory I64:$delta)]>,
109                         Requires<[HasAddr64]>;