Experimental implementation: Exposing SIMD instructions into JavaScript

src/x64/assembler-x64-inl.h

Index: src/x64/assembler-x64-inl.h
diff --git a/src/x64/assembler-x64-inl.h b/src/x64/assembler-x64-inl.h
index 073fcbe8e944902ac096b63f91b976bd3acd1ea0..35b6baf148ff2d9aeff1bbd8edcc10c898bf9227 100644
--- a/src/x64/assembler-x64-inl.h
+++ b/src/x64/assembler-x64-inl.h
@@ -199,6 +199,10 @@ void Assembler::emit_optional_rex_32(Register rm_reg) {
   if (rm_reg.high_bit()) emit(0x41);
 }
 
+void Assembler::emit_optional_rex_32(XMMRegister reg) {
+  byte rex_bits =  (reg.code() & 0x8) >> 1;
+  if (rex_bits != 0) emit(0x40 | rex_bits);
+}
 
 void Assembler::emit_optional_rex_32(const Operand& op) {
   if (op.rex_ != 0) emit(0x40 | op.rex_);