[llvm] r343113 - [AArch64] Refactor instructions that write PSTATE (NFCI)
Oliver Stannard via llvm-commits
llvm-commits at lists.llvm.org
Wed Sep 26 07:42:59 PDT 2018
Author: olista01
Date: Wed Sep 26 07:42:59 2018
New Revision: 343113
URL: http://llvm.org/viewvc/llvm-project?rev=343113&view=rev
Log:
[AArch64] Refactor instructions that write PSTATE (NFCI)
Reuse some code in preparation for the v8.5A XAFlag/AXFlag instructions,
which shares part of the encoding of the MSR-immediate.
Patch by Pablo Barrio!
Differential revision: https://reviews.llvm.org/D52472
Modified:
llvm/trunk/lib/Target/AArch64/AArch64InstrFormats.td
Modified: llvm/trunk/lib/Target/AArch64/AArch64InstrFormats.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64InstrFormats.td?rev=343113&r1=343112&r2=343113&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64InstrFormats.td (original)
+++ llvm/trunk/lib/Target/AArch64/AArch64InstrFormats.td Wed Sep 26 07:42:59 2018
@@ -1173,16 +1173,23 @@ def pstatefield4_op : Operand<i32> {
let PrintMethod = "printSystemPStateField";
}
+// Instructions to modify PSTATE, no input reg
let Defs = [NZCV] in
+class PstateWriteSimple<dag iops, string asm, string operands>
+ : SimpleSystemI<0, iops, asm, operands> {
+
+ let Inst{20-19} = 0b00;
+ let Inst{15-12} = 0b0100;
+}
+
class MSRpstateImm0_15
- : SimpleSystemI<0, (ins pstatefield4_op:$pstatefield, imm0_15:$imm),
- "msr", "\t$pstatefield, $imm">,
+ : PstateWriteSimple<(ins pstatefield4_op:$pstatefield, imm0_15:$imm), "msr",
+ "\t$pstatefield, $imm">,
Sched<[WriteSys]> {
+
bits<6> pstatefield;
bits<4> imm;
- let Inst{20-19} = 0b00;
let Inst{18-16} = pstatefield{5-3};
- let Inst{15-12} = 0b0100;
let Inst{11-8} = imm;
let Inst{7-5} = pstatefield{2-0};
@@ -1201,16 +1208,15 @@ def pstatefield1_op : Operand<i32> {
let PrintMethod = "printSystemPStateField";
}
-let Defs = [NZCV] in
class MSRpstateImm0_1
- : SimpleSystemI<0, (ins pstatefield1_op:$pstatefield, imm0_1:$imm),
- "msr", "\t$pstatefield, $imm">,
+ : PstateWriteSimple<(ins pstatefield1_op:$pstatefield, imm0_1:$imm), "msr",
+ "\t$pstatefield, $imm">,
Sched<[WriteSys]> {
+
bits<6> pstatefield;
bit imm;
- let Inst{20-19} = 0b00;
let Inst{18-16} = pstatefield{5-3};
- let Inst{15-9} = 0b0100000;
+ let Inst{11-9} = 0b000;
let Inst{8} = imm;
let Inst{7-5} = pstatefield{2-0};
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