unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
if (MemBarrierInstr(insn)) {
- // DMBsy, DSBsy, and ISBsy instructions have zero operand and are taken care
- // of within the generic ARMBasicMCBuilder::BuildIt() method.
- //
// Inst{3-0} encodes the memory barrier option for the variants.
- MI.addOperand(MCOperand::CreateImm(slice(insn, 3, 0)));
- NumOpsAdded = 1;
- return true;
+ unsigned opt = slice(insn, 3, 0);
+ switch (opt) {
+ case ARM_MB::SY: case ARM_MB::ST:
+ case ARM_MB::ISH: case ARM_MB::ISHST:
+ case ARM_MB::NSH: case ARM_MB::NSHST:
+ case ARM_MB::OSH: case ARM_MB::OSHST:
+ MI.addOperand(MCOperand::CreateImm(opt));
+ NumOpsAdded = 1;
+ return true;
+ default:
+ return false;
+ }
}
switch (Opcode) {
// A8.6.26
// t2BXJ -> Rn
//
-// Miscellaneous control: t2DMBsy (and its t2DMB variants),
-// t2DSBsy (and its t2DSB varianst), t2ISBsy, t2CLREX
+// Miscellaneous control:
// -> no operand (except pred-imm pred-ccr for CLREX, memory barrier variants)
//
// Hint: t2NOP, t2YIELD, t2WFE, t2WFI, t2SEV
if (NumOps == 0)
return true;
+ if (Opcode == ARM::t2DMB || Opcode == ARM::t2DSB) {
+ // Inst{3-0} encodes the memory barrier option for the variants.
+ unsigned opt = slice(insn, 3, 0);
+ switch (opt) {
+ case ARM_MB::SY: case ARM_MB::ST:
+ case ARM_MB::ISH: case ARM_MB::ISHST:
+ case ARM_MB::NSH: case ARM_MB::NSHST:
+ case ARM_MB::OSH: case ARM_MB::OSHST:
+ MI.addOperand(MCOperand::CreateImm(opt));
+ NumOpsAdded = 1;
+ return true;
+ default:
+ return false;
+ }
+ }
+
if (t2MiscCtrlInstr(insn))
return true;
--- /dev/null
+# RUN: llvm-mc --disassemble %s -triple=thumb-apple-darwin9 |& grep {invalid instruction encoding}
+
+# Opcode=1908 Name=t2DMB Format=ARM_FORMAT_THUMBFRM(25)
+# 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
+# -------------------------------------------------------------------------------------------------
+# | 1: 1: 1: 1| 0: 0: 1: 1| 1: 0: 1: 1| 1: 1: 1: 1| 1: 0: 0: 0| 1: 1: 1: 1| 0: 1: 0: 1| 0: 0: 0: 1|
+# -------------------------------------------------------------------------------------------------
+#
+# Inst{3-0} encodes the option: SY, ST, ISH, ISHST, NSH, NSHST, OSH, OSHST.
+# Reject invalid encodings.
+#
+# See also A8.6.42 DSB
+# All other encodings of option are reserved. It is IMPLEMENTATION DEFINED whether options
+# other than SY are implemented. All unsupported and reserved options must execute as a full
+# system DSB operation, but software must not rely on this behavior.
+0xbf 0xf3 0x51 0x8f
--- /dev/null
+# RUN: llvm-mc --disassemble %s -triple=arm-apple-darwin9 |& grep {invalid instruction encoding}
+
+# Opcode=102 Name=DSB Format=ARM_FORMAT_MISCFRM(26)
+# 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
+# -------------------------------------------------------------------------------------------------
+# | 1: 1: 1: 1| 0: 1: 0: 1| 0: 1: 1: 1| 1: 1: 1: 1| 1: 1: 1: 1| 0: 0: 0: 0| 0: 1: 0: 0| 0: 0: 0: 0|
+# -------------------------------------------------------------------------------------------------
+#
+# Inst{3-0} encodes the option: SY, ST, ISH, ISHST, NSH, NSHST, OSH, OSHST.
+# Reject invalid encodings.
+#
+# See also A8.6.42 DSB
+# All other encodings of option are reserved. It is IMPLEMENTATION DEFINED whether options
+# other than SY are implemented. All unsupported and reserved options must execute as a full
+# system DSB operation, but software must not rely on this behavior.
+0x40 0xf0 0x7f 0xf5
# CHECK: vmov r1, r0, d11
0x50 0xec 0x1b 0x1b
+
+# CHECK: dsb nsh
+0xbf 0xf3 0x47 0x8f
+
+# CHECK: isb
+0xbf 0xf3 0x6f 0x8f