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Add MRMXr/MRMXm form to X86 for use by instructions which treat the 'reg' field of modrm byte as a don't care value. Will allow for simplification of disassembler code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201059 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper
2014-02-10 00:50:34 +00:00
parent 537dca94b3
commit d8fdb19a7f
8 changed files with 35 additions and 11 deletions
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utils/TableGen/X86RecognizableInstr.cpp
+6
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@@ -63,6 +63,7 @@ namespace X86Local {
RawFrmSrc = 8,
RawFrmDst = 9,
RawFrmDstSrc = 10,
MRMXr = 14, MRMXm = 15,
MRM0r = 16, MRM1r = 17, MRM2r = 18, MRM3r = 19,
MRM4r = 20, MRM5r = 21, MRM6r = 22, MRM7r = 23,
MRM0m = 24, MRM1m = 25, MRM2m = 26, MRM3m = 27,
@@ -165,6 +166,8 @@ static bool needsModRMForDecode(uint8_t form) {
form == X86Local::MRMDestMem ||
form == X86Local::MRMSrcReg ||
form == X86Local::MRMSrcMem ||
form == X86Local::MRMXr ||
form == X86Local::MRMXm ||
(form >= X86Local::MRM0r && form <= X86Local::MRM7r) ||
(form >= X86Local::MRM0m && form <= X86Local::MRM7m));
}
@@ -178,6 +181,7 @@ static bool needsModRMForDecode(uint8_t form) {
static bool isRegFormat(uint8_t form) {
return (form == X86Local::MRMDestReg ||
form == X86Local::MRMSrcReg ||
form == X86Local::MRMXr ||
(form >= X86Local::MRM0r && form <= X86Local::MRM7r));
}
@@ -741,6 +745,7 @@ void RecognizableInstr::emitInstructionSpecifier() {
HANDLE_OPTIONAL(immediate)
HANDLE_OPTIONAL(immediate) // above might be a register in 7:4
break;
case X86Local::MRMXr:
case X86Local::MRM0r:
case X86Local::MRM1r:
case X86Local::MRM2r:
@@ -767,6 +772,7 @@ void RecognizableInstr::emitInstructionSpecifier() {
HANDLE_OPTIONAL(relocation)
HANDLE_OPTIONAL(immediate)
break;
case X86Local::MRMXm:
case X86Local::MRM0m:
case X86Local::MRM1m:
case X86Local::MRM2m: