Implement support for the bizarre 3DNow! encoding (which is unlike anything

[oota-llvm.git] / lib / Target / X86 / X86Instr3DNow.td

diff --git a/lib/Target/X86/X86Instr3DNow.td b/lib/Target/X86/X86Instr3DNow.td
index 7615f845a46faf641e9a1e3cd9266d2aba50efb0..9efa2a6cd3321bcfe82a438472235ac42feb225b 100644 (file)
--- a/lib/Target/X86/X86Instr3DNow.td
+++ b/lib/Target/X86/X86Instr3DNow.td
@@ -11,3 +11,34 @@
 // floating point and also adds a few more random instructions for good measure.
 //
 //===----------------------------------------------------------------------===//
+
+// FIXME: We don't support any intrinsics for these instructions yet.
+
+class I3DNow<bits<8> o, Format F, dag outs, dag ins, string asm, 
+             list<dag> pattern>
+      : I<o, F, outs, ins, asm, pattern>, TB, Requires<[Has3DNow]>,
+        Has3DNow0F0FOpcode {
+  // FIXME: The disassembler doesn't support 3DNow! yet.
+  let isAsmParserOnly = 1;
+}
+
+
+let Constraints = "$src1 = $dst" in {
+  // MMXI_binop_rm_int - Simple MMX binary operator based on intrinsic.
+  // When this is cleaned up, remove the FIXME from X86RecognizableInstr.cpp.
+  multiclass I3DNow_binop_rm<bits<8> opc, string Mnemonic> {
+    def rr : I3DNow<opc, MRMSrcReg, (outs VR64:$dst),
+                    (ins VR64:$src1, VR64:$src2),
+                    !strconcat(Mnemonic, "\t{$src2, $dst|$dst, $src2}"), []>;
+    def rm : I3DNow<opc, MRMSrcMem, (outs VR64:$dst),
+                    (ins VR64:$src1, i64mem:$src2),
+                    !strconcat(Mnemonic, "\t{$src2, $dst|$dst, $src2}"), []>;
+  }
+}
+
+defm PAVGUSB : I3DNow_binop_rm<0xBF, "pavgusb">;
+
+
+
+
+// TODO: Add support for the rest of the 3DNow! and "3DNowA" instructions.