Fix ssat and ssat16 encodings for ARM and Thumb. The bit position value
must be encoded decremented by one. Only add encoding tests for ssat16
because ssat can't be parsed yet.
llvm-svn: 132324
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td
index fd55021..f6ccf75 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.td
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.td
@@ -475,6 +475,12 @@
let EncoderMethod = "getMsbOpValue";
}
+def ssat_imm : Operand<i32>, ImmLeaf<i32, [{
+ return Imm > 0 && Imm <= 32;
+}]> {
+ let EncoderMethod = "getSsatBitPosValue";
+}
+
// Define ARM specific addressing modes.
def MemMode2AsmOperand : AsmOperandClass {
@@ -2455,7 +2461,7 @@
// Signed/Unsigned saturate -- for disassembly only
-def SSAT : AI<(outs GPR:$Rd), (ins i32imm:$sat_imm, GPR:$a, shift_imm:$sh),
+def SSAT : AI<(outs GPR:$Rd), (ins ssat_imm:$sat_imm, GPR:$a, shift_imm:$sh),
SatFrm, NoItinerary, "ssat", "\t$Rd, $sat_imm, $a$sh",
[/* For disassembly only; pattern left blank */]> {
bits<4> Rd;
@@ -2471,7 +2477,7 @@
let Inst{3-0} = Rn;
}
-def SSAT16 : AI<(outs GPR:$Rd), (ins i32imm:$sat_imm, GPR:$Rn), SatFrm,
+def SSAT16 : AI<(outs GPR:$Rd), (ins ssat_imm:$sat_imm, GPR:$Rn), SatFrm,
NoItinerary, "ssat16", "\t$Rd, $sat_imm, $Rn",
[/* For disassembly only; pattern left blank */]> {
bits<4> Rd;