+==============+===========+===================+===========+===================+=====================================+============+=========================+==============+===============+
| cosf | 37 | 32 | 73 | 72 | :math:`[0, 2\pi]` | Ryzen 1700 | Ubuntu 20.04 LTS x86_64 | Clang 12.0.0 | |
+--------------+-----------+-------------------+-----------+-------------------+-------------------------------------+------------+-------------------------+--------------+---------------+
-| expf | 14 | 9 | 58 | 42 | :math:`[-10, 10]` | Ryzen 1700 | Ubuntu 20.04 LTS x86_64 | Clang 12.0.0 | FMA |
+| expf | 9 | 7 | 44 | 38 | :math:`[-10, 10]` | Ryzen 1700 | Ubuntu 20.04 LTS x86_64 | Clang 12.0.0 | FMA |
+--------------+-----------+-------------------+-----------+-------------------+-------------------------------------+------------+-------------------------+--------------+---------------+
| exp2f | 25 | 8 | 81 | 37 | :math:`[-10, 10]` | Ryzen 1700 | Ubuntu 20.04 LTS x86_64 | Clang 12.0.0 | FMA |
+--------------+-----------+-------------------+-----------+-------------------+-------------------------------------+------------+-------------------------+--------------+---------------+
#include "common_constants.h" // Lookup tables EXP_M1 and EXP_M2.
#include "src/__support/FPUtil/BasicOperations.h"
#include "src/__support/FPUtil/FEnvImpl.h"
-#include "src/__support/FPUtil/FMA.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/FPUtil/PolyEval.h"
+#include "src/__support/FPUtil/multiply_add.h"
+#include "src/__support/FPUtil/nearest_integer.h"
#include "src/__support/common.h"
#include <errno.h>
// generated by Sollya.
// x_hi = (hi + mid) * 2^7 = round(x * 2^7).
- // The default rounding mode for float-to-int conversion in C++ is
- // round-toward-zero. To make it round-to-nearest, we add (-1)^sign(x) * 0.5
- // before conversion.
- int x_hi = static_cast<int>(x * 0x1.0p7f + (xbits.get_sign() ? -0.5f : 0.5f));
+ float kf = fputil::nearest_integer(x * 0x1.0p7f);
// Subtract (hi + mid) from x to get lo.
- x -= static_cast<float>(x_hi) * 0x1.0p-7f;
- double xd = static_cast<double>(x);
+ double xd = static_cast<double>(fputil::multiply_add(kf, -0x1.0p-7f, x));
+ int x_hi = static_cast<int>(kf);
x_hi += 104 << 7;
// hi = x_hi >> 7
double exp_hi = EXP_M1[x_hi >> 7];