ARM assembly parsing and encoding support for USAT and USAT16.
Use range checked immediate operands for instructions. Add tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136285 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 7e9687a..722fff7 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -2785,7 +2785,7 @@
let Inst{3-0} = Rn;
}
-def USAT : AI<(outs GPR:$Rd), (ins i32imm:$sat_imm, GPR:$Rn, shift_imm:$sh),
+def USAT : AI<(outs GPR:$Rd), (ins imm0_31:$sat_imm, GPR:$Rn, shift_imm:$sh),
SatFrm, NoItinerary, "usat", "\t$Rd, $sat_imm, $Rn$sh", []> {
bits<4> Rd;
bits<5> sat_imm;
@@ -2800,7 +2800,7 @@
let Inst{3-0} = Rn;
}
-def USAT16 : AI<(outs GPR:$Rd), (ins i32imm:$sat_imm, GPR:$a), SatFrm,
+def USAT16 : AI<(outs GPR:$Rd), (ins imm0_15:$sat_imm, GPR:$a), SatFrm,
NoItinerary, "usat16", "\t$Rd, $sat_imm, $a",
[/* For disassembly only; pattern left blank */]> {
bits<4> Rd;
@@ -4364,9 +4364,11 @@
(RSCrsr GPR:$Rdn, GPR:$Rdn, so_reg_reg:$shift, pred:$p,
cc_out:$s)>, Requires<[IsARM]>;
-// SSAT optional shift operand.
+// SSAT/USAT optional shift operand.
def : InstAlias<"ssat${p} $Rd, $sat_imm, $Rn",
(SSAT GPR:$Rd, imm1_32:$sat_imm, GPR:$Rn, 0, pred:$p)>;
+def : InstAlias<"usat${p} $Rd, $sat_imm, $Rn",
+ (USAT GPR:$Rd, imm0_31:$sat_imm, GPR:$Rn, 0, pred:$p)>;
// Extend instruction optional rotate operand.