Remove unused trigonometric code.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 048181492022a7fedbd8322363a6f47ed5038052..4633400688d3f3864d1324967522f28e8888dad1 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -896,9 +896,6 @@ void TranscendentalCacheStub::Generate(MacroAssembler* masm) {
 
 Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() {
   switch (type_) {
-    case TranscendentalCache::SIN: return Runtime::kMath_sin;
-    case TranscendentalCache::COS: return Runtime::kMath_cos;
-    case TranscendentalCache::TAN: return Runtime::kMath_tan;
     case TranscendentalCache::LOG: return Runtime::kMath_log;
     default:
       UNIMPLEMENTED();
@@ -913,95 +910,10 @@ void TranscendentalCacheStub::GenerateOperation(
   // Input value is on FP stack, and also in ebx/edx.
   // Input value is possibly in xmm1.
   // Address of result (a newly allocated HeapNumber) may be in eax.
-  if (type == TranscendentalCache::SIN ||
-      type == TranscendentalCache::COS ||
-      type == TranscendentalCache::TAN) {
-    // Both fsin and fcos require arguments in the range +/-2^63 and
-    // return NaN for infinities and NaN. They can share all code except
-    // the actual fsin/fcos operation.
-    Label in_range, done;
-    // If argument is outside the range -2^63..2^63, fsin/cos doesn't
-    // work. We must reduce it to the appropriate range.
-    __ mov(edi, edx);
-    __ and_(edi, Immediate(0x7ff00000));  // Exponent only.
-    int supported_exponent_limit =
-        (63 + HeapNumber::kExponentBias) << HeapNumber::kExponentShift;
-    __ cmp(edi, Immediate(supported_exponent_limit));
-    __ j(below, &in_range, Label::kNear);
-    // Check for infinity and NaN. Both return NaN for sin.
-    __ cmp(edi, Immediate(0x7ff00000));
-    Label non_nan_result;
-    __ j(not_equal, &non_nan_result, Label::kNear);
-    // Input is +/-Infinity or NaN. Result is NaN.
-    __ fstp(0);
-    // NaN is represented by 0x7ff8000000000000.
-    __ push(Immediate(0x7ff80000));
-    __ push(Immediate(0));
-    __ fld_d(Operand(esp, 0));
-    __ add(esp, Immediate(2 * kPointerSize));
-    __ jmp(&done, Label::kNear);
-
-    __ bind(&non_nan_result);
-
-    // Use fpmod to restrict argument to the range +/-2*PI.
-    __ mov(edi, eax);  // Save eax before using fnstsw_ax.
-    __ fldpi();
-    __ fadd(0);
-    __ fld(1);
-    // FPU Stack: input, 2*pi, input.
-    {
-      Label no_exceptions;
-      __ fwait();
-      __ fnstsw_ax();
-      // Clear if Illegal Operand or Zero Division exceptions are set.
-      __ test(eax, Immediate(5));
-      __ j(zero, &no_exceptions, Label::kNear);
-      __ fnclex();
-      __ bind(&no_exceptions);
-    }
-
-    // Compute st(0) % st(1)
-    {
-      Label partial_remainder_loop;
-      __ bind(&partial_remainder_loop);
-      __ fprem1();
-      __ fwait();
-      __ fnstsw_ax();
-      __ test(eax, Immediate(0x400 /* C2 */));
-      // If C2 is set, computation only has partial result. Loop to
-      // continue computation.
-      __ j(not_zero, &partial_remainder_loop);
-    }
-    // FPU Stack: input, 2*pi, input % 2*pi
-    __ fstp(2);
-    __ fstp(0);
-    __ mov(eax, edi);  // Restore eax (allocated HeapNumber pointer).
-
-    // FPU Stack: input % 2*pi
-    __ bind(&in_range);
-    switch (type) {
-      case TranscendentalCache::SIN:
-        __ fsin();
-        break;
-      case TranscendentalCache::COS:
-        __ fcos();
-        break;
-      case TranscendentalCache::TAN:
-        // FPTAN calculates tangent onto st(0) and pushes 1.0 onto the
-        // FP register stack.
-        __ fptan();
-        __ fstp(0);  // Pop FP register stack.
-        break;
-      default:
-        UNREACHABLE();
-    }
-    __ bind(&done);
-  } else {
-    ASSERT(type == TranscendentalCache::LOG);
-    __ fldln2();
-    __ fxch();
-    __ fyl2x();
-  }
+  ASSERT(type == TranscendentalCache::LOG);
+  __ fldln2();
+  __ fxch();
+  __ fyl2x();
 }