title: enable ARM mode in Xcode 4.4
body: <p>I'm trying to compile the following code in Xcode 4.4. I know that to enable the compiler to recognize the _asm keyword that I must enable ARM compilation on this file and I believe that to do that I must add -marm to the compiler flags to this translation unit. Does anyone know how to do this in Xcode. Is this right? and does anyone know the way to do it in Xcode 4.4?</p>
  
  <pre><code>_asm volatile 
  (
   // Store A &amp; B leaving room for q4-q7, which should be preserved
   "vldmia %1, { q0-q3 } \n\t"
   "vldmia %2, { q8-q11 }\n\t"
  
   // result = first column of B x first row of A
   "vmul.f32 q12, q8, d0[0]\n\t"
   "vmul.f32 q13, q8, d2[0]\n\t"
   "vmul.f32 q14, q8, d4[0]\n\t"
   "vmul.f32 q15, q8, d6[0]\n\t"
  
   // result += second column of B x second row of A
   "vmla.f32 q12, q9, d0[1]\n\t"
   "vmla.f32 q13, q9, d2[1]\n\t"
   "vmla.f32 q14, q9, d4[1]\n\t"
   "vmla.f32 q15, q9, d6[1]\n\t"
  
   // result += third column of B x third row of A
   "vmla.f32 q12, q10, d1[0]\n\t"
   "vmla.f32 q13, q10, d3[0]\n\t"
   "vmla.f32 q14, q10, d5[0]\n\t"
   "vmla.f32 q15, q10, d7[0]\n\t"
  
   // result += last column of B x last row of A
   "vmla.f32 q12, q11, d1[1]\n\t"
   "vmla.f32 q13, q11, d3[1]\n\t"
   "vmla.f32 q14, q11, d5[1]\n\t"
   "vmla.f32 q15, q11, d7[1]\n\t"
  
   // output = result registers
   "vstmia %0, { q12-q15 }"
   : // no output
   : "r" (output), "r" (a), "r" (b)   // input - note *value* of pointer doesn't change
   : "memory", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15" //clobber
   );
  </code></pre>