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[libc][math][c23] Add fmodf16 C23 math function
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13 files changed

+118
-29
lines changed

13 files changed

+118
-29
lines changed

‎libc/config/linux/aarch64/entrypoints.txt

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@@ -515,6 +515,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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libc.src.math.fminimum_magf16
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libc.src.math.fminimum_mag_numf16
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libc.src.math.fminimum_numf16
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libc.src.math.fmodf16
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libc.src.math.fromfpf16
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libc.src.math.fromfpxf16
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libc.src.math.llrintf16

‎libc/config/linux/x86_64/entrypoints.txt

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@@ -548,6 +548,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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libc.src.math.fminimum_magf16
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libc.src.math.fminimum_mag_numf16
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libc.src.math.fminimum_numf16
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libc.src.math.fmodf16
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libc.src.math.fromfpf16
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libc.src.math.fromfpxf16
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libc.src.math.llrintf16

‎libc/docs/math/index.rst

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@@ -156,7 +156,7 @@ Basic Operations
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| fminimum_num | |check| | |check| | |check| | |check| | |check| | 7.12.12.9 | F.10.9.5 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| fmod | |check| | |check| | |check| | | |check| | 7.12.10.1 | F.10.7.1 |
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| fmod | |check| | |check| | |check| | |check| | |check| | 7.12.10.1 | F.10.7.1 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| fmul | N/A | | | N/A | | 7.12.14.3 | F.10.11 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+

‎libc/spec/stdc.td

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@@ -478,6 +478,7 @@ def StdC : StandardSpec<"stdc"> {
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FunctionSpec<"fmod", RetValSpec<DoubleType>, [ArgSpec<DoubleType>, ArgSpec<DoubleType>]>,
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FunctionSpec<"fmodf", RetValSpec<FloatType>, [ArgSpec<FloatType>, ArgSpec<FloatType>]>,
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FunctionSpec<"fmodl", RetValSpec<LongDoubleType>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoubleType>]>,
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GuardedFunctionSpec<"fmodf16", RetValSpec<Float16Type>, [ArgSpec<Float16Type>, ArgSpec<Float16Type>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"fmodf128", RetValSpec<Float128Type>, [ArgSpec<Float128Type>, ArgSpec<Float128Type>], "LIBC_TYPES_HAS_FLOAT128">,
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FunctionSpec<"frexp", RetValSpec<DoubleType>, [ArgSpec<DoubleType>, ArgSpec<IntPtr>]>,

‎libc/src/__support/FPUtil/FPBits.h

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@@ -744,7 +744,7 @@ struct FPRepImpl : public FPRepSem<fp_type, RetT> {
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if (LIBC_LIKELY(ep >= 0)) {
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// Implicit number bit will be removed by mask
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result.set_significand(number);
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result.set_biased_exponent(ep + 1);
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result.set_biased_exponent(static_cast<StorageType>(ep + 1));
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} else {
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result.set_significand(number >> -ep);
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}

‎libc/src/__support/FPUtil/generic/FMod.h

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@@ -210,7 +210,9 @@ class FMod {
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e_x - e_y <= int(FPB::EXP_LEN))) {
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StorageType m_x = sx.get_explicit_mantissa();
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StorageType m_y = sy.get_explicit_mantissa();
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StorageType d = (e_x == e_y) ? (m_x - m_y) : (m_x << (e_x - e_y)) % m_y;
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StorageType d = (e_x == e_y)
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? (m_x - m_y)
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: static_cast<StorageType>(m_x << (e_x - e_y)) % m_y;
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if (d == 0)
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return FPB::zero();
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// iy - 1 because of "zero power" for number with power 1

‎libc/src/math/CMakeLists.txt

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@@ -183,6 +183,7 @@ add_math_entrypoint_object(fminimum_mag_numf128)
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add_math_entrypoint_object(fmod)
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add_math_entrypoint_object(fmodf)
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add_math_entrypoint_object(fmodl)
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add_math_entrypoint_object(fmodf16)
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add_math_entrypoint_object(fmodf128)
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add_math_entrypoint_object(frexp)

‎libc/src/math/fmodf16.h

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@@ -0,0 +1,20 @@
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//===-- Implementation header for fmodf16 -----------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_SRC_MATH_FMODF16_H
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#define LLVM_LIBC_SRC_MATH_FMODF16_H
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#include "src/__support/macros/properties/types.h"
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namespace LIBC_NAMESPACE {
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float16 fmodf16(float16 x, float16 y);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_MATH_FMODF16_H

‎libc/src/math/generic/CMakeLists.txt

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@@ -2887,6 +2887,19 @@ add_entrypoint_object(
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-O3
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)
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add_entrypoint_object(
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fmodf16
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SRCS
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fmodf16.cpp
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HDRS
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../fmodf16.h
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DEPENDS
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libc.src.__support.macros.properties.types
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libc.src.__support.FPUtil.generic.fmod
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COMPILE_OPTIONS
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-O3
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)
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add_entrypoint_object(
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fmodf128
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SRCS

‎libc/src/math/generic/fmodf16.cpp

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@@ -0,0 +1,19 @@
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//===-- Implementation of fmodf16 function --------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/math/fmodf16.h"
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#include "src/__support/FPUtil/generic/FMod.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(float16, fmodf16, (float16 x, float16 y)) {
16+
return fputil::generic::FMod<float16>::eval(x, y);
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}
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} // namespace LIBC_NAMESPACE

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