[libc-commits] [libc] [libc] Make ldexpf128/scalbnf128/scalblnf128 use emulated Float128 (PR #220295)
Parth Patel via libc-commits
libc-commits at lists.llvm.org
Tue Sep 1 09:55:07 PDT 2026
https://github.com/rigalis created https://github.com/llvm/llvm-project/pull/220295
This makes the three exponent scaling functions ldexpf128, scalbnf128 and scalblnf128 work with the emulated Float128 type, so they can be used on platforms without native __float128.
Fixes #219759 (part of #216576).
>From b1902c73d8f871c7e34b98cdf43992ac929b7a70 Mon Sep 17 00:00:00 2001
From: rigalis <patelpparth15 at gmail.com>
Date: Tue, 1 Sep 2026 21:12:30 +0530
Subject: [PATCH 1/3] ldexpf128
---
libc/config/baremetal/aarch64/entrypoints.txt | 2 +-
libc/config/baremetal/arm/entrypoints.txt | 2 +-
libc/config/baremetal/riscv/entrypoints.txt | 2 +-
libc/config/darwin/aarch64/entrypoints.txt | 2 +-
libc/config/freebsd/x86_64/entrypoints.txt | 2 +-
libc/config/linux/aarch64/entrypoints.txt | 2 +-
libc/config/linux/riscv/entrypoints.txt | 2 +-
libc/config/linux/x86_64/entrypoints.txt | 2 +-
libc/shared/math/ldexpf128.h | 6 ------
libc/src/__support/math/CMakeLists.txt | 4 ++--
libc/src/__support/math/ldexpf128.h | 16 +++++-----------
libc/src/math/generic/CMakeLists.txt | 1 +
libc/src/math/generic/ldexpf128.cpp | 6 ++++--
libc/src/math/ldexpf128.h | 5 +++++
libc/test/shared/shared_math_constexpr_test.cpp | 2 ++
libc/test/shared/shared_math_test.cpp | 6 ++----
16 files changed, 29 insertions(+), 33 deletions(-)
diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index 9a296693e22eb..b0a28afad3f7c 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -412,6 +412,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -779,7 +780,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 7ac1a9ce0d35f..1a0a155c16e44 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -424,6 +424,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -790,7 +791,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 9dbaf71d285ee..fb2d27d98695a 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -420,6 +420,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -787,7 +788,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index ba397e2958cae..26836cffd8a58 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -231,6 +231,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -599,7 +600,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/freebsd/x86_64/entrypoints.txt b/libc/config/freebsd/x86_64/entrypoints.txt
index 2bb022667dd09..f9385e9297a93 100644
--- a/libc/config/freebsd/x86_64/entrypoints.txt
+++ b/libc/config/freebsd/x86_64/entrypoints.txt
@@ -166,6 +166,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -539,7 +540,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 869a8c35b91f7..ec42db3600d6e 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -579,6 +579,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.fdimf
libc.src.math.fdiml
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -940,7 +941,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index e7846fbf40d91..6269172b212d1 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -648,6 +648,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -1026,7 +1027,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index d087d955bca16..e95a214e138c2 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -657,6 +657,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffma
libc.src.math.ffmal
libc.src.math.floor
+ libc.src.math.ldexpf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -1035,7 +1036,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.fsubf128
libc.src.math.getpayloadf128
libc.src.math.ilogbf128
- libc.src.math.ldexpf128
libc.src.math.llogbf128
libc.src.math.logbf128
libc.src.math.modff128
diff --git a/libc/shared/math/ldexpf128.h b/libc/shared/math/ldexpf128.h
index d221d71665516..91bd7bf3c321f 100644
--- a/libc/shared/math/ldexpf128.h
+++ b/libc/shared/math/ldexpf128.h
@@ -9,10 +9,6 @@
#ifndef LLVM_LIBC_SHARED_MATH_LDEXPF128_H
#define LLVM_LIBC_SHARED_MATH_LDEXPF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "shared/libc_common.h"
#include "src/__support/math/ldexpf128.h"
@@ -24,6 +20,4 @@ using math::ldexpf128;
} // namespace shared
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SHARED_MATH_LDEXPF128_H
diff --git a/libc/src/__support/math/CMakeLists.txt b/libc/src/__support/math/CMakeLists.txt
index 272e9425a4e1e..d42d095bb457f 100644
--- a/libc/src/__support/math/CMakeLists.txt
+++ b/libc/src/__support/math/CMakeLists.txt
@@ -4039,9 +4039,9 @@ add_header_library(
HDRS
ldexpf128.h
DEPENDS
- libc.src.__support.macros.properties.types
+ libc.src.__support.FPUtil.float128
libc.src.__support.FPUtil.manipulation_functions
- libc.include.llvm-libc-types.float128
+ libc.src.__support.macros.config
)
add_header_library(
diff --git a/libc/src/__support/math/ldexpf128.h b/libc/src/__support/math/ldexpf128.h
index 74e4c354ff8fe..e543d2870f2f7 100644
--- a/libc/src/__support/math/ldexpf128.h
+++ b/libc/src/__support/math/ldexpf128.h
@@ -1,4 +1,4 @@
-//===-- Implementation header for ldexpf ------------------------*- C++ -*-===//
+//===-- Implementation header for ldexpf128 ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -9,26 +9,20 @@
#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_LDEXPF128_H
#define LLVM_LIBC_SRC___SUPPORT_MATH_LDEXPF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "src/__support/FPUtil/ManipulationFunctions.h"
-#include "src/__support/common.h"
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
namespace LIBC_NAMESPACE_DECL {
-
namespace math {
-LIBC_INLINE constexpr float128 ldexpf128(float128 x, int exp) {
+using LIBC_NAMESPACE::fputil::Float128;
+
+LIBC_INLINE constexpr Float128 ldexpf128(Float128 x, int exp) {
return fputil::ldexp(x, exp);
}
} // namespace math
-
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SRC___SUPPORT_MATH_LDEXPF128_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 71f610d9f8281..2f78f8cca4074 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -1733,6 +1733,7 @@ add_entrypoint_object(
HDRS
../ldexpf128.h
DEPENDS
+ libc.src.__support.CPP.bit
libc.src.__support.math.ldexpf128
)
diff --git a/libc/src/math/generic/ldexpf128.cpp b/libc/src/math/generic/ldexpf128.cpp
index 40afa5b285bcd..13c64041b7eda 100644
--- a/libc/src/math/generic/ldexpf128.cpp
+++ b/libc/src/math/generic/ldexpf128.cpp
@@ -7,13 +7,15 @@
//===----------------------------------------------------------------------===//
#include "src/math/ldexpf128.h"
-
+#include "src/__support/CPP/bit.h"
#include "src/__support/math/ldexpf128.h"
namespace LIBC_NAMESPACE_DECL {
+using LIBC_NAMESPACE::fputil::Float128;
+
LLVM_LIBC_FUNCTION(float128, ldexpf128, (float128 x, int exp)) {
- return math::ldexpf128(x, exp);
+ return cpp::bit_cast<float128>(math::ldexpf128(cpp::bit_cast<Float128>(x), exp));
}
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/ldexpf128.h b/libc/src/math/ldexpf128.h
index 74c3ef612166e..64e1e07ed80b3 100644
--- a/libc/src/math/ldexpf128.h
+++ b/libc/src/math/ldexpf128.h
@@ -9,11 +9,16 @@
#ifndef LLVM_LIBC_SRC_MATH_LDEXPF128_H
#define LLVM_LIBC_SRC_MATH_LDEXPF128_H
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/properties/types.h"
namespace LIBC_NAMESPACE_DECL {
+#ifndef LIBC_TYPES_HAS_NATIVE_FLOAT128
+using float128 = LIBC_NAMESPACE::fputil::Float128;
+#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
+
float128 ldexpf128(float128 x, int exp);
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/shared/shared_math_constexpr_test.cpp b/libc/test/shared/shared_math_constexpr_test.cpp
index c04f1a361395a..fcf5de3b2f1db 100644
--- a/libc/test/shared/shared_math_constexpr_test.cpp
+++ b/libc/test/shared/shared_math_constexpr_test.cpp
@@ -403,6 +403,8 @@ static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::roundf128(Float128(0.0)));
static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::truncf128(Float128(0.0)));
+static_assert(Float128(0.0) ==
+ LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
//===----------------------------------------------------------------------===//
// Native Float128 Tests
diff --git a/libc/test/shared/shared_math_test.cpp b/libc/test/shared/shared_math_test.cpp
index 737efdb09d8c5..74e336070ff82 100644
--- a/libc/test/shared/shared_math_test.cpp
+++ b/libc/test/shared/shared_math_test.cpp
@@ -604,6 +604,8 @@ TEST(LlvmLibcSharedMathTest, AllEmuFloat128) {
EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::roundf128(Float128(0.0)));
EXPECT_FP_EQ(Float128(1.0), LIBC_NAMESPACE::shared::sqrtf128(Float128(1.0)));
EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::truncf128(Float128(0.0)));
+ EXPECT_FP_EQ(Float128(0.0),
+ LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
}
#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
@@ -620,10 +622,6 @@ TEST(LlvmLibcSharedMathTest, AllFloat128) {
EXPECT_EQ(exponent, 5);
EXPECT_EQ(3, LIBC_NAMESPACE::shared::ilogbf128(float128(8.0)));
- ASSERT_FP_EQ(float128(8 << 5),
- LIBC_NAMESPACE::shared::ldexpf128(float128(8), 5));
- ASSERT_FP_EQ(float128(-1 * (8 << 5)),
- LIBC_NAMESPACE::shared::ldexpf128(float128(-8), 5));
EXPECT_FP_EQ(float128(0.0), LIBC_NAMESPACE::shared::logbf128(float128(1.0)));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::shared::dfmaf128(
float128(0.0), float128(0.0), float128(0.0)));
>From 0f49bd2574eb6d82887c5b76769cddb19e9e5062 Mon Sep 17 00:00:00 2001
From: rigalis <patelpparth15 at gmail.com>
Date: Tue, 1 Sep 2026 21:18:27 +0530
Subject: [PATCH 2/3] scalbnf128
---
libc/config/baremetal/aarch64/entrypoints.txt | 2 +-
libc/config/baremetal/arm/entrypoints.txt | 2 +-
libc/config/baremetal/riscv/entrypoints.txt | 2 +-
libc/config/darwin/aarch64/entrypoints.txt | 2 +-
libc/config/freebsd/x86_64/entrypoints.txt | 2 +-
libc/config/linux/aarch64/entrypoints.txt | 2 +-
libc/config/linux/riscv/entrypoints.txt | 2 +-
libc/config/linux/x86_64/entrypoints.txt | 2 +-
libc/shared/math/scalbnf128.h | 8 +-------
libc/src/__support/math/CMakeLists.txt | 2 +-
libc/src/__support/math/scalbnf128.h | 11 ++++-------
libc/src/math/generic/CMakeLists.txt | 1 +
libc/src/math/generic/scalbnf128.cpp | 5 ++++-
libc/src/math/scalbnf128.h | 7 ++++++-
libc/test/shared/shared_math_constexpr_test.cpp | 5 +++--
libc/test/shared/shared_math_test.cpp | 5 +++--
16 files changed, 31 insertions(+), 29 deletions(-)
diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index b0a28afad3f7c..a0597c1c54f08 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -413,6 +413,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -790,7 +791,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 1a0a155c16e44..2cb544b947611 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -425,6 +425,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -801,7 +802,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index fb2d27d98695a..af0a31784985d 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -421,6 +421,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -798,7 +799,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 26836cffd8a58..d5ade421f2a8d 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -232,6 +232,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -610,7 +611,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/freebsd/x86_64/entrypoints.txt b/libc/config/freebsd/x86_64/entrypoints.txt
index f9385e9297a93..ca25f637addcb 100644
--- a/libc/config/freebsd/x86_64/entrypoints.txt
+++ b/libc/config/freebsd/x86_64/entrypoints.txt
@@ -167,6 +167,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -550,7 +551,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index ec42db3600d6e..0895bcf3301f2 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -580,6 +580,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.fdiml
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -951,7 +952,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 6269172b212d1..65c3c40337b55 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -649,6 +649,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -1037,7 +1038,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index e95a214e138c2..0da786e0e3fd9 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -658,6 +658,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
libc.src.math.floorl
@@ -1046,7 +1047,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.remainderf128
libc.src.math.remquof128
libc.src.math.scalblnf128
- libc.src.math.scalbnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/shared/math/scalbnf128.h b/libc/shared/math/scalbnf128.h
index 74c8defc0e6d3..a870b276a6dac 100644
--- a/libc/shared/math/scalbnf128.h
+++ b/libc/shared/math/scalbnf128.h
@@ -1,4 +1,4 @@
-//===-- Shared scalbnf128 function ------------------------------*- C++ -*-===//
+//===-- Shared scalbnf128 function -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -9,10 +9,6 @@
#ifndef LLVM_LIBC_SHARED_MATH_SCALBNF128_H
#define LLVM_LIBC_SHARED_MATH_SCALBNF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "shared/libc_common.h"
#include "src/__support/math/scalbnf128.h"
@@ -24,6 +20,4 @@ using math::scalbnf128;
} // namespace shared
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SHARED_MATH_SCALBNF128_H
diff --git a/libc/src/__support/math/CMakeLists.txt b/libc/src/__support/math/CMakeLists.txt
index d42d095bb457f..a07cc81dd1839 100644
--- a/libc/src/__support/math/CMakeLists.txt
+++ b/libc/src/__support/math/CMakeLists.txt
@@ -2684,7 +2684,7 @@ add_header_library(
scalbnf128.h
DEPENDS
libc.hdr.float_macros
- libc.include.llvm-libc-types.float128
+ libc.src.__support.FPUtil.float128
libc.src.__support.FPUtil.manipulation_functions
libc.src.__support.macros.config
)
diff --git a/libc/src/__support/math/scalbnf128.h b/libc/src/__support/math/scalbnf128.h
index bb9b3ecfa4024..98aadb1f6165b 100644
--- a/libc/src/__support/math/scalbnf128.h
+++ b/libc/src/__support/math/scalbnf128.h
@@ -9,12 +9,9 @@
#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_SCALBNF128_H
#define LLVM_LIBC_SRC___SUPPORT_MATH_SCALBNF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "hdr/float_macros.h"
#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
#if FLT_RADIX != 2
@@ -24,13 +21,13 @@
namespace LIBC_NAMESPACE_DECL {
namespace math {
-LIBC_INLINE constexpr float128 scalbnf128(float128 x, int n) {
+using LIBC_NAMESPACE::fputil::Float128;
+
+LIBC_INLINE constexpr Float128 scalbnf128(Float128 x, int n) {
return fputil::ldexp(x, n);
}
} // namespace math
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SRC___SUPPORT_MATH_SCALBNF128_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 2f78f8cca4074..79a65e07b8e44 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -4179,6 +4179,7 @@ add_entrypoint_object(
HDRS
../scalbnf128.h
DEPENDS
+ libc.src.__support.CPP.bit
libc.src.__support.math.scalbnf128
)
diff --git a/libc/src/math/generic/scalbnf128.cpp b/libc/src/math/generic/scalbnf128.cpp
index f2655a3782f33..0923372dc6c53 100644
--- a/libc/src/math/generic/scalbnf128.cpp
+++ b/libc/src/math/generic/scalbnf128.cpp
@@ -7,12 +7,15 @@
//===----------------------------------------------------------------------===//
#include "src/math/scalbnf128.h"
+#include "src/__support/CPP/bit.h"
#include "src/__support/math/scalbnf128.h"
namespace LIBC_NAMESPACE_DECL {
+using LIBC_NAMESPACE::fputil::Float128;
+
LLVM_LIBC_FUNCTION(float128, scalbnf128, (float128 x, int n)) {
- return math::scalbnf128(x, n);
+ return cpp::bit_cast<float128>(math::scalbnf128(cpp::bit_cast<Float128>(x), n));
}
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/scalbnf128.h b/libc/src/math/scalbnf128.h
index b96d954c69e30..35771da381c58 100644
--- a/libc/src/math/scalbnf128.h
+++ b/libc/src/math/scalbnf128.h
@@ -1,4 +1,4 @@
-//===-- Implementation header for scalbnf128 --------------------*- C++ -*-===//
+//===-- Implementation header for scalbnf128 ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -9,11 +9,16 @@
#ifndef LLVM_LIBC_SRC_MATH_SCALBNF128_H
#define LLVM_LIBC_SRC_MATH_SCALBNF128_H
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/properties/types.h"
namespace LIBC_NAMESPACE_DECL {
+#ifndef LIBC_TYPES_HAS_NATIVE_FLOAT128
+using float128 = LIBC_NAMESPACE::fputil::Float128;
+#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
+
float128 scalbnf128(float128 x, int n);
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/shared/shared_math_constexpr_test.cpp b/libc/test/shared/shared_math_constexpr_test.cpp
index fcf5de3b2f1db..6bfb8f5287081 100644
--- a/libc/test/shared/shared_math_constexpr_test.cpp
+++ b/libc/test/shared/shared_math_constexpr_test.cpp
@@ -405,6 +405,8 @@ static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::truncf128(Float128(0.0)));
static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
+static_assert(Float128(0.0) ==
+ LIBC_NAMESPACE::shared::scalbnf128(Float128(0.0), 0));
//===----------------------------------------------------------------------===//
// Native Float128 Tests
@@ -494,8 +496,7 @@ static_assert(float128(0.0) == [] {
}());
static_assert(float128(0.0) ==
LIBC_NAMESPACE::shared::scalblnf128(float128(0.0), 0.0));
-static_assert(float128(0.0) ==
- LIBC_NAMESPACE::shared::scalbnf128(float128(0.0), 0.0));
+
static_assert(0 == [] {
float128 setpayload_x = float128(0.0);
return LIBC_NAMESPACE::shared::setpayloadf128(&setpayload_x, float128(0.0));
diff --git a/libc/test/shared/shared_math_test.cpp b/libc/test/shared/shared_math_test.cpp
index 74e336070ff82..9c868309e302b 100644
--- a/libc/test/shared/shared_math_test.cpp
+++ b/libc/test/shared/shared_math_test.cpp
@@ -606,6 +606,8 @@ TEST(LlvmLibcSharedMathTest, AllEmuFloat128) {
EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::truncf128(Float128(0.0)));
EXPECT_FP_EQ(Float128(0.0),
LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
+ EXPECT_FP_EQ(Float128(0.0),
+ LIBC_NAMESPACE::shared::scalbnf128(Float128(0.0), 0));
}
#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
@@ -747,8 +749,7 @@ TEST(LlvmLibcSharedMathTest, AllFloat128) {
EXPECT_EQ(1, remquof128_exp);
EXPECT_FP_EQ(float128(0.0),
LIBC_NAMESPACE::shared::scalblnf128(float128(0.0), 0L));
- EXPECT_FP_EQ(float128(0.0),
- LIBC_NAMESPACE::shared::scalbnf128(float128(0.0), 0));
+
EXPECT_FP_EQ(0x0p+0f,
LIBC_NAMESPACE::shared::fsubf128(float128(0.0), float128(0.0)));
EXPECT_FP_EQ(0x0p+0f,
>From a4bd0dabaaa3b95584d600f8c309d8aeb26e8413 Mon Sep 17 00:00:00 2001
From: rigalis <patelpparth15 at gmail.com>
Date: Tue, 1 Sep 2026 21:23:39 +0530
Subject: [PATCH 3/3] scalblnf128
---
libc/config/baremetal/aarch64/entrypoints.txt | 2 +-
libc/config/baremetal/arm/entrypoints.txt | 2 +-
libc/config/baremetal/riscv/entrypoints.txt | 2 +-
libc/config/darwin/aarch64/entrypoints.txt | 2 +-
libc/config/freebsd/x86_64/entrypoints.txt | 2 +-
libc/config/linux/aarch64/entrypoints.txt | 2 +-
libc/config/linux/riscv/entrypoints.txt | 2 +-
libc/config/linux/x86_64/entrypoints.txt | 2 +-
libc/shared/math/scalblnf128.h | 8 +-------
libc/src/__support/math/CMakeLists.txt | 2 +-
libc/src/__support/math/scalblnf128.h | 11 ++++-------
libc/src/math/generic/CMakeLists.txt | 1 +
libc/src/math/generic/scalblnf128.cpp | 5 ++++-
libc/src/math/scalblnf128.h | 7 ++++++-
libc/test/shared/shared_math_constexpr_test.cpp | 5 ++---
libc/test/shared/shared_math_test.cpp | 5 +++--
16 files changed, 30 insertions(+), 30 deletions(-)
diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index a0597c1c54f08..fad95af15ae81 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -413,6 +413,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -790,7 +791,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 2cb544b947611..24a39419fedbb 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -425,6 +425,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -801,7 +802,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index af0a31784985d..4b4690f433ebc 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -421,6 +421,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -798,7 +799,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index d5ade421f2a8d..801dda0f51b5f 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -232,6 +232,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -610,7 +611,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/freebsd/x86_64/entrypoints.txt b/libc/config/freebsd/x86_64/entrypoints.txt
index ca25f637addcb..f2320521e4ab4 100644
--- a/libc/config/freebsd/x86_64/entrypoints.txt
+++ b/libc/config/freebsd/x86_64/entrypoints.txt
@@ -167,6 +167,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -550,7 +551,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 0895bcf3301f2..a4673b2033136 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -580,6 +580,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.fdiml
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -951,7 +952,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 65c3c40337b55..e1f84d0ec7482 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -649,6 +649,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -1037,7 +1038,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 0da786e0e3fd9..c162a7abdc609 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -658,6 +658,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.ffmal
libc.src.math.floor
libc.src.math.ldexpf128
+ libc.src.math.scalblnf128
libc.src.math.scalbnf128
libc.src.math.floorf
libc.src.math.floorf128
@@ -1046,7 +1047,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
libc.src.math.nextupf128
libc.src.math.remainderf128
libc.src.math.remquof128
- libc.src.math.scalblnf128
libc.src.math.setpayloadf128
libc.src.math.setpayloadsigf128
libc.src.math.totalorderf128
diff --git a/libc/shared/math/scalblnf128.h b/libc/shared/math/scalblnf128.h
index dfb15bed117cf..3953ea59401eb 100644
--- a/libc/shared/math/scalblnf128.h
+++ b/libc/shared/math/scalblnf128.h
@@ -1,4 +1,4 @@
-//===-- Shared scalblnf128 function -----------------------------*- C++ -*-===//
+//===-- Shared scalblnf128 function -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -9,10 +9,6 @@
#ifndef LLVM_LIBC_SHARED_MATH_SCALBLNF128_H
#define LLVM_LIBC_SHARED_MATH_SCALBLNF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "shared/libc_common.h"
#include "src/__support/math/scalblnf128.h"
@@ -24,6 +20,4 @@ using math::scalblnf128;
} // namespace shared
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SHARED_MATH_SCALBLNF128_H
diff --git a/libc/src/__support/math/CMakeLists.txt b/libc/src/__support/math/CMakeLists.txt
index a07cc81dd1839..809d90fe3df69 100644
--- a/libc/src/__support/math/CMakeLists.txt
+++ b/libc/src/__support/math/CMakeLists.txt
@@ -2621,7 +2621,7 @@ add_header_library(
scalblnf128.h
DEPENDS
libc.hdr.float_macros
- libc.include.llvm-libc-types.float128
+ libc.src.__support.FPUtil.float128
libc.src.__support.FPUtil.manipulation_functions
libc.src.__support.macros.config
)
diff --git a/libc/src/__support/math/scalblnf128.h b/libc/src/__support/math/scalblnf128.h
index 6bd6dd92b7eb1..d0947e1e168b1 100644
--- a/libc/src/__support/math/scalblnf128.h
+++ b/libc/src/__support/math/scalblnf128.h
@@ -9,12 +9,9 @@
#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_SCALBLNF128_H
#define LLVM_LIBC_SRC___SUPPORT_MATH_SCALBLNF128_H
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#include "hdr/float_macros.h"
#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
#if FLT_RADIX != 2
@@ -24,13 +21,13 @@
namespace LIBC_NAMESPACE_DECL {
namespace math {
-LIBC_INLINE constexpr float128 scalblnf128(float128 x, long n) {
+using LIBC_NAMESPACE::fputil::Float128;
+
+LIBC_INLINE constexpr Float128 scalblnf128(Float128 x, long n) {
return fputil::ldexp(x, n);
}
} // namespace math
} // namespace LIBC_NAMESPACE_DECL
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
#endif // LLVM_LIBC_SRC___SUPPORT_MATH_SCALBLNF128_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 79a65e07b8e44..274d679bb8593 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -4119,6 +4119,7 @@ add_entrypoint_object(
HDRS
../scalblnf128.h
DEPENDS
+ libc.src.__support.CPP.bit
libc.src.__support.math.scalblnf128
)
diff --git a/libc/src/math/generic/scalblnf128.cpp b/libc/src/math/generic/scalblnf128.cpp
index 151b75a913dac..31428084a5951 100644
--- a/libc/src/math/generic/scalblnf128.cpp
+++ b/libc/src/math/generic/scalblnf128.cpp
@@ -7,12 +7,15 @@
//===----------------------------------------------------------------------===//
#include "src/math/scalblnf128.h"
+#include "src/__support/CPP/bit.h"
#include "src/__support/math/scalblnf128.h"
namespace LIBC_NAMESPACE_DECL {
+using LIBC_NAMESPACE::fputil::Float128;
+
LLVM_LIBC_FUNCTION(float128, scalblnf128, (float128 x, long n)) {
- return math::scalblnf128(x, n);
+ return cpp::bit_cast<float128>(math::scalblnf128(cpp::bit_cast<Float128>(x), n));
}
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/scalblnf128.h b/libc/src/math/scalblnf128.h
index b9b7a862f66f6..35ba8ae5f0095 100644
--- a/libc/src/math/scalblnf128.h
+++ b/libc/src/math/scalblnf128.h
@@ -1,4 +1,4 @@
-//===-- Implementation header for scalblnf128 -------------------*- C++ -*-===//
+//===-- Implementation header for scalblnf128 ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -9,11 +9,16 @@
#ifndef LLVM_LIBC_SRC_MATH_SCALBLNF128_H
#define LLVM_LIBC_SRC_MATH_SCALBLNF128_H
+#include "src/__support/FPUtil/float128.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/properties/types.h"
namespace LIBC_NAMESPACE_DECL {
+#ifndef LIBC_TYPES_HAS_NATIVE_FLOAT128
+using float128 = LIBC_NAMESPACE::fputil::Float128;
+#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
+
float128 scalblnf128(float128 x, long n);
} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/shared/shared_math_constexpr_test.cpp b/libc/test/shared/shared_math_constexpr_test.cpp
index 6bfb8f5287081..39bb4406b14e6 100644
--- a/libc/test/shared/shared_math_constexpr_test.cpp
+++ b/libc/test/shared/shared_math_constexpr_test.cpp
@@ -407,6 +407,8 @@ static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
static_assert(Float128(0.0) ==
LIBC_NAMESPACE::shared::scalbnf128(Float128(0.0), 0));
+static_assert(Float128(0.0) ==
+ LIBC_NAMESPACE::shared::scalblnf128(Float128(0.0), 0L));
//===----------------------------------------------------------------------===//
// Native Float128 Tests
@@ -494,9 +496,6 @@ static_assert(float128(0.0) == [] {
int exp{};
return LIBC_NAMESPACE::shared::remquof128(float128(1.0), float128(1.0), &exp);
}());
-static_assert(float128(0.0) ==
- LIBC_NAMESPACE::shared::scalblnf128(float128(0.0), 0.0));
-
static_assert(0 == [] {
float128 setpayload_x = float128(0.0);
return LIBC_NAMESPACE::shared::setpayloadf128(&setpayload_x, float128(0.0));
diff --git a/libc/test/shared/shared_math_test.cpp b/libc/test/shared/shared_math_test.cpp
index 9c868309e302b..05155bc2dff70 100644
--- a/libc/test/shared/shared_math_test.cpp
+++ b/libc/test/shared/shared_math_test.cpp
@@ -608,6 +608,8 @@ TEST(LlvmLibcSharedMathTest, AllEmuFloat128) {
LIBC_NAMESPACE::shared::ldexpf128(Float128(0.0), 0));
EXPECT_FP_EQ(Float128(0.0),
LIBC_NAMESPACE::shared::scalbnf128(Float128(0.0), 0));
+ EXPECT_FP_EQ(Float128(0.0),
+ LIBC_NAMESPACE::shared::scalblnf128(Float128(0.0), 0L));
}
#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
@@ -747,8 +749,7 @@ TEST(LlvmLibcSharedMathTest, AllFloat128) {
LIBC_NAMESPACE::shared::remquof128(float128(1.0), float128(1.0),
&remquof128_exp));
EXPECT_EQ(1, remquof128_exp);
- EXPECT_FP_EQ(float128(0.0),
- LIBC_NAMESPACE::shared::scalblnf128(float128(0.0), 0L));
+
EXPECT_FP_EQ(0x0p+0f,
LIBC_NAMESPACE::shared::fsubf128(float128(0.0), float128(0.0)));
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