diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86Instr64bit.td')
| -rw-r--r-- | llvm/lib/Target/X86/X86Instr64bit.td | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/llvm/lib/Target/X86/X86Instr64bit.td b/llvm/lib/Target/X86/X86Instr64bit.td index 1f9aaedc4b8..274ef26b22d 100644 --- a/llvm/lib/Target/X86/X86Instr64bit.td +++ b/llvm/lib/Target/X86/X86Instr64bit.td @@ -89,76 +89,6 @@ def MOV64ao64 : RIi32<0xA3, RawFrm, (outs offset64:$dst), (ins), */ -// Sign/Zero extenders - -// MOVSX64rr8 always has a REX prefix and it has an 8-bit register -// operand, which makes it a rare instruction with an 8-bit register -// operand that can never access an h register. If support for h registers -// were generalized, this would require a special register class. -def MOVSX64rr8 : RI<0xBE, MRMSrcReg, (outs GR64:$dst), (ins GR8 :$src), - "movs{bq|x}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sext GR8:$src))]>, TB; -def MOVSX64rm8 : RI<0xBE, MRMSrcMem, (outs GR64:$dst), (ins i8mem :$src), - "movs{bq|x}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sextloadi64i8 addr:$src))]>, TB; -def MOVSX64rr16: RI<0xBF, MRMSrcReg, (outs GR64:$dst), (ins GR16:$src), - "movs{wq|x}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sext GR16:$src))]>, TB; -def MOVSX64rm16: RI<0xBF, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src), - "movs{wq|x}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sextloadi64i16 addr:$src))]>, TB; -def MOVSX64rr32: RI<0x63, MRMSrcReg, (outs GR64:$dst), (ins GR32:$src), - "movs{lq|xd}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sext GR32:$src))]>; -def MOVSX64rm32: RI<0x63, MRMSrcMem, (outs GR64:$dst), (ins i32mem:$src), - "movs{lq|xd}\t{$src, $dst|$dst, $src}", - [(set GR64:$dst, (sextloadi64i32 addr:$src))]>; - -// movzbq and movzwq encodings for the disassembler -def MOVZX64rr8_Q : RI<0xB6, MRMSrcReg, (outs GR64:$dst), (ins GR8:$src), - "movz{bq|x}\t{$src, $dst|$dst, $src}", []>, TB; -def MOVZX64rm8_Q : RI<0xB6, MRMSrcMem, (outs GR64:$dst), (ins i8mem:$src), - "movz{bq|x}\t{$src, $dst|$dst, $src}", []>, TB; -def MOVZX64rr16_Q : RI<0xB7, MRMSrcReg, (outs GR64:$dst), (ins GR16:$src), - "movz{wq|x}\t{$src, $dst|$dst, $src}", []>, TB; -def MOVZX64rm16_Q : RI<0xB7, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src), - "movz{wq|x}\t{$src, $dst|$dst, $src}", []>, TB; - -// Use movzbl instead of movzbq when the destination is a register; it's -// equivalent due to implicit zero-extending, and it has a smaller encoding. -def MOVZX64rr8 : I<0xB6, MRMSrcReg, (outs GR64:$dst), (ins GR8 :$src), - "", [(set GR64:$dst, (zext GR8:$src))]>, TB; -def MOVZX64rm8 : I<0xB6, MRMSrcMem, (outs GR64:$dst), (ins i8mem :$src), - "", [(set GR64:$dst, (zextloadi64i8 addr:$src))]>, TB; -// Use movzwl instead of movzwq when the destination is a register; it's -// equivalent due to implicit zero-extending, and it has a smaller encoding. -def MOVZX64rr16: I<0xB7, MRMSrcReg, (outs GR64:$dst), (ins GR16:$src), - "", [(set GR64:$dst, (zext GR16:$src))]>, TB; -def MOVZX64rm16: I<0xB7, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src), - "", [(set GR64:$dst, (zextloadi64i16 addr:$src))]>, TB; - -// There's no movzlq instruction, but movl can be used for this purpose, using -// implicit zero-extension. The preferred way to do 32-bit-to-64-bit zero -// extension on x86-64 is to use a SUBREG_TO_REG to utilize implicit -// zero-extension, however this isn't possible when the 32-bit value is -// defined by a truncate or is copied from something where the high bits aren't -// necessarily all zero. In such cases, we fall back to these explicit zext -// instructions. -def MOVZX64rr32 : I<0x89, MRMDestReg, (outs GR64:$dst), (ins GR32:$src), - "", [(set GR64:$dst, (zext GR32:$src))]>; -def MOVZX64rm32 : I<0x8B, MRMSrcMem, (outs GR64:$dst), (ins i32mem:$src), - "", [(set GR64:$dst, (zextloadi64i32 addr:$src))]>; - -let neverHasSideEffects = 1 in { - let Defs = [RAX], Uses = [EAX] in - def CDQE : RI<0x98, RawFrm, (outs), (ins), - "{cltq|cdqe}", []>; // RAX = signext(EAX) - - let Defs = [RAX,RDX], Uses = [RAX] in - def CQO : RI<0x99, RawFrm, (outs), (ins), - "{cqto|cqo}", []>; // RDX:RAX = signext(RAX) -} - //===----------------------------------------------------------------------===// // Arithmetic Instructions... // |
