1 //===-- X86InstrCMovSetCC.td - Conditional Move and SetCC --*- tablegen -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file describes the X86 conditional move and set on condition
12 //===----------------------------------------------------------------------===//
16 let isCodeGenOnly = 1, ForceDisassemble = 1 in {
17 let Uses = [EFLAGS], Predicates = [HasCMov], Constraints = "$src1 = $dst",
18 isCommutable = 1, SchedRW = [WriteCMOV] in {
20 : I<0x40, MRMSrcRegCC, (outs GR16:$dst), (ins GR16:$src1, GR16:$src2, ccode:$cond),
21 "cmov${cond}{w}\t{$src2, $dst|$dst, $src2}",
23 (X86cmov GR16:$src1, GR16:$src2, timm:$cond, EFLAGS))]>,
26 : I<0x40, MRMSrcRegCC, (outs GR32:$dst), (ins GR32:$src1, GR32:$src2, ccode:$cond),
27 "cmov${cond}{l}\t{$src2, $dst|$dst, $src2}",
29 (X86cmov GR32:$src1, GR32:$src2, timm:$cond, EFLAGS))]>,
32 :RI<0x40, MRMSrcRegCC, (outs GR64:$dst), (ins GR64:$src1, GR64:$src2, ccode:$cond),
33 "cmov${cond}{q}\t{$src2, $dst|$dst, $src2}",
35 (X86cmov GR64:$src1, GR64:$src2, timm:$cond, EFLAGS))]>, TB;
38 let Uses = [EFLAGS], Predicates = [HasCMov], Constraints = "$src1 = $dst",
39 SchedRW = [WriteCMOV.Folded, WriteCMOV.ReadAfterFold] in {
41 : I<0x40, MRMSrcMemCC, (outs GR16:$dst), (ins GR16:$src1, i16mem:$src2, ccode:$cond),
42 "cmov${cond}{w}\t{$src2, $dst|$dst, $src2}",
43 [(set GR16:$dst, (X86cmov GR16:$src1, (loadi16 addr:$src2),
44 timm:$cond, EFLAGS))]>, TB, OpSize16;
46 : I<0x40, MRMSrcMemCC, (outs GR32:$dst), (ins GR32:$src1, i32mem:$src2, ccode:$cond),
47 "cmov${cond}{l}\t{$src2, $dst|$dst, $src2}",
48 [(set GR32:$dst, (X86cmov GR32:$src1, (loadi32 addr:$src2),
49 timm:$cond, EFLAGS))]>, TB, OpSize32;
51 :RI<0x40, MRMSrcMemCC, (outs GR64:$dst), (ins GR64:$src1, i64mem:$src2, ccode:$cond),
52 "cmov${cond}{q}\t{$src2, $dst|$dst, $src2}",
53 [(set GR64:$dst, (X86cmov GR64:$src1, (loadi64 addr:$src2),
54 timm:$cond, EFLAGS))]>, TB;
55 } // Uses = [EFLAGS], Predicates = [HasCMov], Constraints = "$src1 = $dst"
56 } // isCodeGenOnly = 1, ForceDisassemble = 1
58 def inv_cond_XFORM : SDNodeXForm<imm, [{
59 X86::CondCode CC = static_cast<X86::CondCode>(N->getZExtValue());
60 return CurDAG->getTargetConstant(X86::GetOppositeBranchCondition(CC),
64 // Conditional moves with folded loads with operands swapped and conditions
66 let Predicates = [HasCMov] in {
67 def : Pat<(X86cmov (loadi16 addr:$src1), GR16:$src2, timm:$cond, EFLAGS),
68 (CMOV16rm GR16:$src2, addr:$src1, (inv_cond_XFORM timm:$cond))>;
69 def : Pat<(X86cmov (loadi32 addr:$src1), GR32:$src2, timm:$cond, EFLAGS),
70 (CMOV32rm GR32:$src2, addr:$src1, (inv_cond_XFORM timm:$cond))>;
71 def : Pat<(X86cmov (loadi64 addr:$src1), GR64:$src2, timm:$cond, EFLAGS),
72 (CMOV64rm GR64:$src2, addr:$src1, (inv_cond_XFORM timm:$cond))>;
75 // SetCC instructions.
76 let Uses = [EFLAGS], isCodeGenOnly = 1, ForceDisassemble = 1 in {
77 def SETCCr : I<0x90, MRMXrCC, (outs GR8:$dst), (ins ccode:$cond),
79 [(set GR8:$dst, (X86setcc timm:$cond, EFLAGS))]>,
80 TB, Sched<[WriteSETCC]>;
81 def SETCCm : I<0x90, MRMXmCC, (outs), (ins i8mem:$dst, ccode:$cond),
83 [(store (X86setcc timm:$cond, EFLAGS), addr:$dst)]>,
84 TB, Sched<[WriteSETCCStore]>;
87 multiclass CMOV_SETCC_Aliases<string Cond, int CC> {
88 def : InstAlias<"cmov"#Cond#"{w}\t{$src, $dst|$dst, $src}",
89 (CMOV16rr GR16:$dst, GR16:$src, CC), 0>;
90 def : InstAlias<"cmov"#Cond#"{w}\t{$src, $dst|$dst, $src}",
91 (CMOV16rm GR16:$dst, i16mem:$src, CC), 0>;
92 def : InstAlias<"cmov"#Cond#"{l}\t{$src, $dst|$dst, $src}",
93 (CMOV32rr GR32:$dst, GR32:$src, CC), 0>;
94 def : InstAlias<"cmov"#Cond#"{l}\t{$src, $dst|$dst, $src}",
95 (CMOV32rm GR32:$dst, i32mem:$src, CC), 0>;
96 def : InstAlias<"cmov"#Cond#"{q}\t{$src, $dst|$dst, $src}",
97 (CMOV64rr GR64:$dst, GR64:$src, CC), 0>;
98 def : InstAlias<"cmov"#Cond#"{q}\t{$src, $dst|$dst, $src}",
99 (CMOV64rm GR64:$dst, i64mem:$src, CC), 0>;
101 def : InstAlias<"set"#Cond#"\t$dst", (SETCCr GR8:$dst, CC), 0>;
102 def : InstAlias<"set"#Cond#"\t$dst", (SETCCm i8mem:$dst, CC), 0>;
105 defm : CMOV_SETCC_Aliases<"o" , 0>;
106 defm : CMOV_SETCC_Aliases<"no", 1>;
107 defm : CMOV_SETCC_Aliases<"b" , 2>;
108 defm : CMOV_SETCC_Aliases<"ae", 3>;
109 defm : CMOV_SETCC_Aliases<"e" , 4>;
110 defm : CMOV_SETCC_Aliases<"ne", 5>;
111 defm : CMOV_SETCC_Aliases<"be", 6>;
112 defm : CMOV_SETCC_Aliases<"a" , 7>;
113 defm : CMOV_SETCC_Aliases<"s" , 8>;
114 defm : CMOV_SETCC_Aliases<"ns", 9>;
115 defm : CMOV_SETCC_Aliases<"p" , 10>;
116 defm : CMOV_SETCC_Aliases<"np", 11>;
117 defm : CMOV_SETCC_Aliases<"l" , 12>;
118 defm : CMOV_SETCC_Aliases<"ge", 13>;
119 defm : CMOV_SETCC_Aliases<"le", 14>;
120 defm : CMOV_SETCC_Aliases<"g" , 15>;
122 // SALC is an undocumented instruction. Information for this instruction can be found
123 // here http://www.rcollins.org/secrets/opcodes/SALC.html
125 let Uses = [EFLAGS], Defs = [AL], SchedRW = [WriteALU] in {
126 def SALC : I<0xD6, RawFrm, (outs), (ins), "salc", []>, Requires<[Not64BitMode]>;