diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.td | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td index b57fdb31157..e77b385ea63 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.td +++ b/llvm/lib/Target/X86/X86InstrInfo.td @@ -2543,6 +2543,21 @@ def EH_RETURN : I<0xC3, RawFrm, (outs), (ins GR32:$addr), // Atomic support // +// Atomic swap. These are just normal xchg instructions. But since a memory +// operand is referenced, the atomicity is ensured. +let Constraints = "$val = $dst", Defs = [EFLAGS] in { +def XCHG32rm : I<0x87, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$ptr, GR32:$val), + "xchg{l}\t{$val, $ptr|$ptr, $val}", + [(set GR32:$dst, (atomic_swap_32 addr:$ptr, GR32:$val))]>; +def XCHG16rm : I<0x87, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$ptr, GR16:$val), + "xchg{w}\t{$val, $ptr|$ptr, $val}", + [(set GR16:$dst, (atomic_swap_16 addr:$ptr, GR16:$val))]>, + OpSize; +def XCHG8rm : I<0x86, MRMSrcMem, (outs GR8:$dst), (ins i8mem:$ptr, GR8:$val), + "xchg{b}\t{$val, $ptr|$ptr, $val}", + [(set GR8:$dst, (atomic_swap_8 addr:$ptr, GR8:$val))]>; +} + // Atomic compare and swap. let Defs = [EAX, EFLAGS], Uses = [EAX] in { def LCMPXCHG32 : I<0xB1, MRMDestMem, (outs), (ins i32mem:$ptr, GR32:$swap), @@ -2566,20 +2581,6 @@ def LCMPXCHG8 : I<0xB0, MRMDestMem, (outs), (ins i8mem:$ptr, GR8:$swap), [(X86cas addr:$ptr, GR8:$swap, 1)]>, TB, LOCK; } -// Atomic swap -let Constraints = "$val = $dst", Defs = [EFLAGS] in { -def LXCHG32 : I<0x87, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$ptr, GR32:$val), - "lock xchg{l}\t{$val, $ptr|$ptr, $val}", - [(set GR32:$dst, (atomic_swap_32 addr:$ptr, GR32:$val))]>, LOCK; -def LXCHG16 : I<0x87, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$ptr, GR16:$val), - "lock xchg{w}\t{$val, $ptr|$ptr, $val}", - [(set GR16:$dst, (atomic_swap_16 addr:$ptr, GR16:$val))]>, - OpSize, LOCK; -def LXCHG8 : I<0x86, MRMSrcMem, (outs GR8:$dst), (ins i8mem:$ptr, GR8:$val), - "lock xchg{b}\t{$val, $ptr|$ptr, $val}", - [(set GR8:$dst, (atomic_swap_8 addr:$ptr, GR8:$val))]>, LOCK; -} - // Atomic exchange and add let Constraints = "$val = $dst", Defs = [EFLAGS] in { def LXADD32 : I<0xC1, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$ptr, GR32:$val), |
