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[X86] Add nopq instruction which is a rex encoded version of nopl for gas compatibility.

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llvm-svn: 308818
This commit is contained in:
Craig Topper 2017-07-22 01:30:53 +00:00
parent 018313f51e
commit 77c57c1c02
4 changed files with 19 additions and 0 deletions
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4
lib/Target/X86/X86InstrInfo.td
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@ -1108,11 +1108,15 @@ let hasSideEffects = 0, SchedRW = [WriteZero] in {
"nop{w}\t$zero", [], IIC_NOP>, TB, OpSize16;
def NOOPL : I<0x1f, MRMXm, (outs), (ins i32mem:$zero),
"nop{l}\t$zero", [], IIC_NOP>, TB, OpSize32;
def NOOPQ : RI<0x1f, MRMXm, (outs), (ins i64mem:$zero),
"nop{q}\t$zero", [], IIC_NOP>, TB;
// Also allow register so we can assemble/disassemble
def NOOPWr : I<0x1f, MRMXr, (outs), (ins GR16:$zero),
"nop{w}\t$zero", [], IIC_NOP>, TB, OpSize16;
def NOOPLr : I<0x1f, MRMXr, (outs), (ins GR32:$zero),
"nop{l}\t$zero", [], IIC_NOP>, TB, OpSize32;
def NOOPQr : RI<0x1f, MRMXr, (outs), (ins GR64:$zero),
"nop{q}\t$zero", [], IIC_NOP>, TB;
}

6
test/MC/Disassembler/X86/x86-64.txt
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@ -480,3 +480,9 @@
# CHECK: lwpval $2309737967, (%esp), %edx
0x67 0x8f 0xea 0x68 0x12 0x0c 0x24 0xef 0xcd 0xab 0x89
# CHECK: nopq -559038737(%rbx,%rcx,8)
0x48 0x0f 0x1f 0x84 0xcb 0xef 0xbe 0xad 0xde
# CHECK: nopq %rax
0x48 0x0f 0x1f 0xC0

1
test/MC/X86/x86-32-coverage.s
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@ -2055,6 +2055,7 @@
// CHECK: encoding: [0x0f,0x1f,0x84,0xcb,0xef,0xbe,0xad,0xde]
nopl 0xdeadbeef(%ebx,%ecx,8)
// CHECK: nopw 32493
// CHECK: encoding: [0x66,0x0f,0x1f,0x05,0xed,0x7e,0x00,0x00]
nopw 0x7eed

8
test/MC/X86/x86-64.s
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@ -1509,3 +1509,11 @@ vmovq %xmm0, %rax
// CHECK: movl %r15d, (%r15,%r15)
// CHECK: encoding: [0x47,0x89,0x3c,0x3f]
movl %r15d, (%r15,%r15)
// CHECK: nopq 3735928559(%rbx,%rcx,8)
// CHECK: encoding: [0x48,0x0f,0x1f,0x84,0xcb,0xef,0xbe,0xad,0xde]
nopq 0xdeadbeef(%rbx,%rcx,8)
// CHECK: nopq %rax
// CHECK: encoding: [0x48,0x0f,0x1f,0xc0]
nopq %rax