diff options
Diffstat (limited to 'compiler/utils/x86/assembler_x86.h')
| -rw-r--r-- | compiler/utils/x86/assembler_x86.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h index db92a80a4e..f6e7fbc8cd 100644 --- a/compiler/utils/x86/assembler_x86.h +++ b/compiler/utils/x86/assembler_x86.h @@ -736,8 +736,14 @@ class X86Assembler final : public Assembler { void fptan(); void fprem(); + void xchgb(ByteRegister dst, ByteRegister src); void xchgb(ByteRegister reg, const Address& address); + + // Wrappers for `xchgb` that accept `Register` instead of `ByteRegister` (used for testing). + void xchgb(Register dst, Register src); void xchgb(Register reg, const Address& address); + + void xchgw(Register dst, Register src); void xchgw(Register reg, const Address& address); void xchgl(Register dst, Register src); @@ -1044,6 +1050,10 @@ class X86Assembler final : public Assembler { uint8_t EmitVexPrefixByteTwo(bool W, int SET_VEX_L, int SET_VEX_PP); + + // Helper function to emit a shorter variant of XCHG for when at least one operand is EAX/AX. + bool try_xchg_eax(Register dst, Register src); + ConstantArea constant_area_; bool has_AVX_; // x86 256bit SIMD AVX. bool has_AVX2_; // x86 256bit SIMD AVX 2.0. |