+class XForm_28<bits<6> opcode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : XForm_base_r3xo<opcode, xo, OOL, IOL, asmstr, itin, pattern> {
+}
+
+// This is used for MFFS, MTFSB0, MTFSB1. 42 is arbitrary; this series of
+// numbers presumably relates to some document, but I haven't found it.
+class XForm_42<bits<6> opcode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : XForm_base_r3xo<opcode, xo, OOL, IOL, asmstr, itin, pattern> {
+ let Pattern = pattern;
+
+ bit RC = 0; // set by isDOT
+
+ let Inst{6-10} = RST;
+ let Inst{11-20} = 0;
+ let Inst{21-30} = xo;
+ let Inst{31} = RC;
+}
+class XForm_43<bits<6> opcode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : XForm_base_r3xo<opcode, xo, OOL, IOL, asmstr, itin, pattern> {
+ let Pattern = pattern;
+ bits<5> FM;
+
+ bit RC = 0; // set by isDOT
+
+ let Inst{6-10} = FM;
+ let Inst{11-20} = 0;
+ let Inst{21-30} = xo;
+ let Inst{31} = RC;
+}
+
+class XForm_0<bits<6> opcode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : XForm_base_r3xo<opcode, xo, OOL, IOL, asmstr, itin, pattern> {
+ let RST = 0;
+ let A = 0;
+ let B = 0;
+}
+
+class XForm_16b<bits<6> opcode, bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : XForm_base_r3xo<opcode, xo, OOL, IOL, asmstr, itin, pattern> {
+ let RST = 0;
+ let A = 0;
+}
+
+// DCB_Form - Form X instruction, used for dcb* instructions.
+class DCB_Form<bits<10> xo, bits<5> immfield, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : I<31, OOL, IOL, asmstr, itin> {
+ bits<5> A;
+ bits<5> B;
+
+ let Pattern = pattern;
+
+ let Inst{6-10} = immfield;
+ let Inst{11-15} = A;
+ let Inst{16-20} = B;
+ let Inst{21-30} = xo;
+ let Inst{31} = 0;
+}
+
+
+// DSS_Form - Form X instruction, used for altivec dss* instructions.
+class DSS_Form<bits<10> xo, dag OOL, dag IOL, string asmstr,
+ InstrItinClass itin, list<dag> pattern>
+ : I<31, OOL, IOL, asmstr, itin> {
+ bits<1> T;
+ bits<2> STRM;
+ bits<5> A;
+ bits<5> B;
+
+ let Pattern = pattern;
+
+ let Inst{6} = T;
+ let Inst{7-8} = 0;
+ let Inst{9-10} = STRM;
+ let Inst{11-15} = A;
+ let Inst{16-20} = B;
+ let Inst{21-30} = xo;
+ let Inst{31} = 0;