def MOV64ao32 : RIi32<0xA3, RawFrm, (outs i32imm:$dst), (ins),
"mov{q}\t{%rax, $dst|$dst, %rax}", []>;
+// Moves to and from segment registers
+def MOV64rs : RI<0x8C, MRMDestReg, (outs GR64:$dst), (ins SEGMENT_REG:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV64ms : RI<0x8C, MRMDestMem, (outs i64mem:$dst), (ins SEGMENT_REG:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV64sr : RI<0x8E, MRMSrcReg, (outs SEGMENT_REG:$dst), (ins GR64:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV64sm : RI<0x8E, MRMSrcMem, (outs SEGMENT_REG:$dst), (ins i64mem:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+
// Sign/Zero extenders
// MOVSX64rr8 always has a REX prefix and it has an 8-bit register
def MOV32ao32 : Ii32 <0xA3, RawFrm, (outs i32imm:$dst), (ins),
"mov{l}\t{%eax, $dst|$dst, %eax}", []>;
+// Moves to and from segment registers
+def MOV16rs : I<0x8C, MRMDestReg, (outs GR16:$dst), (ins SEGMENT_REG:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV16ms : I<0x8C, MRMDestMem, (outs i16mem:$dst), (ins SEGMENT_REG:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV16sr : I<0x8E, MRMSrcReg, (outs SEGMENT_REG:$dst), (ins GR16:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+def MOV16sm : I<0x8E, MRMSrcMem, (outs SEGMENT_REG:$dst), (ins i16mem:$src),
+ "mov{w}\t{$src, $dst|$dst, $src}", []>;
+
let canFoldAsLoad = 1, isReMaterializable = 1, mayHaveSideEffects = 1 in {
def MOV8rm : I<0x8A, MRMSrcMem, (outs GR8 :$dst), (ins i8mem :$src),
"mov{b}\t{$src, $dst|$dst, $src}",
}];
}
+// Segment registers for use by MOV instructions (and others) that have a
+// segment register as one operand. Always contain a 16-bit segment
+// descriptor.
+def SEGMENT_REG : RegisterClass<"X86", [i16], 16, [CS, DS, SS, ES, FS, GS]> {
+}
// GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD, GR32_ABCD, GR64_ABCD - Subclasses of
// GR8, GR16, GR32, and GR64 which contain just the "a" "b", "c", and "d"