Index: src/x64/assembler-x64-inl.h |
=================================================================== |
--- src/x64/assembler-x64-inl.h (revision 2072) |
+++ src/x64/assembler-x64-inl.h (working copy) |
@@ -56,7 +56,7 @@ |
// High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
-// REX.W is set. |
+// REX.W is set. REX.X is cleared. |
void Assembler::emit_rex_64(Register reg, Register rm_reg) { |
emit(0x48 | (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3); |
} |
@@ -70,6 +70,39 @@ |
} |
+// High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
+// REX.W is set. REX.X is cleared. |
+void Assembler::emit_rex_32(Register reg, Register rm_reg) { |
+ emit(0x40 | (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3); |
+} |
+ |
+ |
+// The high bit of reg is used for REX.R, the high bit of op's base |
+// register is used for REX.B, and the high bit of op's index register |
+// is used for REX.X. REX.W is cleared. |
+void Assembler::emit_rex_32(Register reg, const Operand& op) { |
+ emit(0x40 | (reg.code() & 0x8) >> 1 | op.rex_); |
+} |
+ |
+ |
+// High bit of reg goes to REX.R, high bit of rm_reg goes to REX.B. |
+// REX.W and REX.X are cleared. If no REX bits are set, no byte is emitted. |
+void Assembler::emit_optional_rex_32(Register reg, Register rm_reg) { |
+ byte rex_bits = (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3; |
+ if (rex_bits) emit(0x40 | rex_bits); |
+} |
+ |
+ |
+// The high bit of reg is used for REX.R, the high bit of op's base |
+// register is used for REX.B, and the high bit of op's index register |
+// is used for REX.X. REX.W is cleared. If no REX bits are set, nothing |
+// is emitted. |
+void Assembler::emit_optional_rex_32(Register reg, const Operand& op) { |
+ byte rex_bits = (reg.code() & 0x8) >> 1 | op.rex_; |
+ if (rex_bits) emit(0x40 | rex_bits); |
+} |
+ |
+ |
void Assembler::set_target_address_at(byte* location, byte* value) { |
UNIMPLEMENTED(); |
} |