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fix the encoding of the obscure "moffset" forms of moves, i386

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part first.  rdar://7947184


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103660 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-05-12 22:48:24 +00:00
parent 9a1581b910
commit 2745f6e920
2 changed files with 13 additions and 5 deletions
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11
lib/Target/X86/X86InstrInfo.td
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@ -966,16 +966,17 @@ def MOV32mi : Ii32<0xC7, MRM0m, (outs), (ins i32mem:$dst, i32imm:$src),
"mov{l}\t{$src, $dst|$dst, $src}",
[(store (i32 imm:$src), addr:$dst)]>;
def MOV8o8a : Ii8 <0xA0, RawFrm, (outs), (ins offset8:$src),
/// moffs8, moffs16, moffs32 and moffs64 versions of moves. The immediate is a
/// 32-bit offset from the PC.
def MOV8o8a : Ii32 <0xA0, RawFrm, (outs), (ins offset8:$src),
"mov{b}\t{$src, %al|%al, $src}", []>;
def MOV16o16a : Ii16 <0xA1, RawFrm, (outs), (ins offset16:$src),
def MOV16o16a : Ii32 <0xA1, RawFrm, (outs), (ins offset16:$src),
"mov{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
def MOV32o32a : Ii32 <0xA1, RawFrm, (outs), (ins offset32:$src),
"mov{l}\t{$src, %eax|%eax, $src}", []>;
def MOV8ao8 : Ii8 <0xA2, RawFrm, (outs offset8:$dst), (ins),
def MOV8ao8 : Ii32 <0xA2, RawFrm, (outs offset8:$dst), (ins),
"mov{b}\t{%al, $dst|$dst, %al}", []>;
def MOV16ao16 : Ii16 <0xA3, RawFrm, (outs offset16:$dst), (ins),
def MOV16ao16 : Ii32 <0xA3, RawFrm, (outs offset16:$dst), (ins),
"mov{w}\t{%ax, $dst|$dst, %ax}", []>, OpSize;
def MOV32ao32 : Ii32 <0xA3, RawFrm, (outs offset32:$dst), (ins),
"mov{l}\t{%eax, $dst|$dst, %eax}", []>;

7
test/MC/AsmParser/X86/x86_32-new-encoder.s
View File

@ -50,3 +50,10 @@ rdtscp
// CHECK: shrl %eax # encoding: [0xd1,0xe8]
shrl $1, %eax
// moffset forms of moves, rdar://7947184
movb 0, %al // CHECK: movb 0, %al # encoding: [0xa0,A,A,A,A]
movw 0, %ax // CHECK: movw 0, %ax # encoding: [0x66,0xa1,A,A,A,A]
movl 0, %eax // CHECK: movl 0, %eax # encoding: [0xa1,A,A,A,A]