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Add encodings and mnemonics for FXSAVE64 and FXRSTOR64.

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These are just FXSAVE and FXRSTOR with REX.W prefixes.  These versions use
64-bit pointer values instead of 32-bit pointer values in the memory map they
dump and restore.

llvm-svn: 125446
This commit is contained in:
Reid Kleckner 2011-02-12 23:24:13 +00:00
parent 3cc16c2b89
commit 0e68b2ed88
2 changed files with 12 additions and 0 deletions
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4
lib/Target/X86/X86InstrFPStack.td
View File

@ -625,8 +625,12 @@ def FCOMPP : I<0xD9, RawFrm, (outs), (ins), "fcompp", []>, DE;
def FXSAVE : I<0xAE, MRM0m, (outs opaque512mem:$dst), (ins),
"fxsave\t$dst", []>, TB;
def FXSAVE64 : I<0xAE, MRM0m, (outs opaque512mem:$dst), (ins),
"fxsaveq\t$dst", []>, TB, REX_W, Requires<[In64BitMode]>;
def FXRSTOR : I<0xAE, MRM1m, (outs), (ins opaque512mem:$src),
"fxrstor\t$src", []>, TB;
def FXRSTOR64 : I<0xAE, MRM1m, (outs), (ins opaque512mem:$src),
"fxrstorq\t$src", []>, TB, REX_W, Requires<[In64BitMode]>;
//===----------------------------------------------------------------------===//
// Non-Instruction Patterns

8
test/MC/X86/x86_64-encoding.s
View File

@ -140,3 +140,11 @@ pshufb CPI1_0(%rip), %xmm1
// CHECK: encoding: [0x48,0x8b,0x04,0xe1]
movq (%rcx,%riz,8), %rax
// CHECK: fxsaveq (%rax)
// CHECK: encoding: [0x48,0x0f,0xae,0x00]
fxsaveq (%rax)
// CHECK: fxrstorq (%rax)
// CHECK: encoding: [0x48,0x0f,0xae,0x08]
fxrstorq (%rax)