1 files changed, 2 insertions, 93 deletions
diff --git a/libc/src/math/generic/atanf16.cpp b/libc/src/math/generic/atanf16.cpp
index 9b6ec65..7191c42 100644
--- a/libc/src/math/generic/atanf16.cpp
+++ b/libc/src/math/generic/atanf16.cpp
@@ -7,101 +7,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "src/math/atanf16.h"
-#include "hdr/errno_macros.h"
-#include "hdr/fenv_macros.h"
-#include "src/__support/FPUtil/FEnvImpl.h"
-#include "src/__support/FPUtil/FPBits.h"
-#include "src/__support/FPUtil/PolyEval.h"
-#include "src/__support/FPUtil/cast.h"
-#include "src/__support/FPUtil/except_value_utils.h"
-#include "src/__support/FPUtil/multiply_add.h"
-#include "src/__support/FPUtil/sqrt.h"
-#include "src/__support/macros/optimization.h"
+#include "src/__support/math/atanf16.h"
 
 namespace LIBC_NAMESPACE_DECL {
 
-// Generated by Solly using the following command:
-// > round(pi/2, SG, RN);
-static constexpr float PI_2 = 0x1.921fb6p0;
-
-#ifndef LIBC_MATH_HAS_SKIP_ACCURATE_PASS
-static constexpr size_t N_EXCEPTS = 6;
-
-static constexpr fputil::ExceptValues<float16, N_EXCEPTS> ATANF16_EXCEPTS{{
-    // (input, RZ output, RU offset, RD offset, RN offset)
-    {0x2745, 0x2744, 1, 0, 1},
-    {0x3099, 0x3090, 1, 0, 1},
-    {0x3c6c, 0x3aae, 1, 0, 1},
-    {0x466e, 0x3daa, 1, 0, 1},
-    {0x48ae, 0x3ddb, 1, 0, 0},
-    {0x5619, 0x3e3d, 1, 0, 1},
-}};
-#endif // !LIBC_MATH_HAS_SKIP_ACCURATE_PASS
-
-LLVM_LIBC_FUNCTION(float16, atanf16, (float16 x)) {
-  using FPBits = fputil::FPBits<float16>;
-  FPBits xbits(x);
-
-  uint16_t x_u = xbits.uintval();
-  uint16_t x_abs = x_u & 0x7fff;
-  bool x_sign = x_u >> 15;
-  float sign = (x_sign ? -1.0 : 1.0);
-
-  // |x| >= +/-inf
-  if (LIBC_UNLIKELY(x_abs >= 0x7c00)) {
-    if (xbits.is_nan()) {
-      if (xbits.is_signaling_nan()) {
-        fputil::raise_except_if_required(FE_INVALID);
-        return FPBits::quiet_nan().get_val();
-      }
-      return x;
-    }
-
-    // atanf16(+/-inf) = +/-pi/2
-    return fputil::cast<float16>(sign * PI_2);
-  }
-
-  float xf = x;
-  float xsq = xf * xf;
-#ifndef LIBC_MATH_HAS_SKIP_ACCURATE_PASS
-  // Handle exceptional values
-  if (auto r = ATANF16_EXCEPTS.lookup_odd(x_abs, x_sign);
-      LIBC_UNLIKELY(r.has_value()))
-    return r.value();
-#endif
-
-  // |x| <= 0x1p0, |x| <= 1
-  if (x_abs <= 0x3c00) {
-    // atanf16(+/-0) = +/-0
-    if (LIBC_UNLIKELY(x_abs == 0))
-      return x;
-
-    // Degree-14 minimax odd polynomial of atan(x) generated by Sollya with:
-    // > P = fpminimax(atan(x)/x, [|0, 2, 4, 6, 8, 10, 12, 14|], [|SG...|],
-    // [0, 1]);
-    float result = fputil::polyeval(
-        xsq, 0x1.fffffcp-1f, -0x1.55519ep-2f, 0x1.98f6a8p-3f, -0x1.1f0a92p-3f,
-        0x1.95b654p-4f, -0x1.e65492p-5f, 0x1.8c0c36p-6f, -0x1.32316ep-8f);
-    return fputil::cast<float16>(xf * result);
-  }
-
-  // If |x| > 1
-  // y = atan(x) = sign(x) * atan(|x|)
-  // atan(|x|) = pi/2 - atan(1/|x|)
-  // Recall, 1/|x| < 1
-  float x_inv_sq = 1.0f / xsq;
-  float x_inv = fputil::sqrt<float>(x_inv_sq);
-
-  // Degree-14 minimax odd polynomial of atan(x) generated by Sollya with:
-  // > P = fpminimax(atan(x)/x, [|0, 2, 4, 6, 8, 10, 12, 14|], [|SG...|],
-  // [0, 1]);
-  float interm =
-      fputil::polyeval(x_inv_sq, 0x1.fffffcp-1f, -0x1.55519ep-2f,
-                       0x1.98f6a8p-3f, -0x1.1f0a92p-3f, 0x1.95b654p-4f,
-                       -0x1.e65492p-5f, 0x1.8c0c36p-6f, -0x1.32316ep-8f);
-
-  return fputil::cast<float16>(sign *
-                               fputil::multiply_add(x_inv, -interm, PI_2));
-}
+LLVM_LIBC_FUNCTION(float16, atanf16, (float16 x)) { return math::atanf16(x); }
 
 } // namespace LIBC_NAMESPACE_DECL