[libc-commits] [libc] [llvm] [libc][math] Refactor f16fmaf128 to Header Only (PR #177850)
LLVM Continuous Integration via libc-commits
libc-commits at lists.llvm.org
Thu Feb 5 09:54:40 PST 2026
llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder `libc-riscv32-qemu-yocto-fullbuild-dbg` running on `rv32gc-qemu-system` while building `libc,utils` at step 4 "annotate".
Full details are available at: https://lab.llvm.org/buildbot/#/builders/196/builds/15692
<details>
<summary>Here is the relevant piece of the build log for the reference</summary>
```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
-- Build files have been written to: /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build
@@@BUILD_STEP build libc@@@
Running: ninja libc
ninja: no work to do.
@@@BUILD_STEP build libc-startup@@@
Running: ninja libc-startup
ninja: no work to do.
@@@BUILD_STEP libc-unit-tests@@@
Running: ninja libc-unit-tests
[1/1635] Building CXX object libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o
FAILED: libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o
/usr/local/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_21_0_0_git -D_DEBUG -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc -isystem /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc/include -mabi=ilp32d -march=rv32imafdc --target=riscv32-unknown-linux-gnu --sysroot=/opt/riscv/sysroot --gcc-toolchain=/opt/riscv -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -std=gnu++17 --target=riscv32-unknown-linux-gnu -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_COPT_STRING_LENGTH_IMPL=element -DLIBC_COPT_FIND_FIRST_CHARACTER_IMPL=element -DLIBC_ADD_NULL_CHECKS -DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_DEFAULT -DLIBC_THREAD_MODE=LIBC_THREAD_MODE_PLATFORM -DLIBC_CONF_WCTYPE_MODE=LIBC_WCTYPE_MODE_ASCII -DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=100 -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ffixed-point -Wall -Wextra -Wconversion -Wno-sign-conversion -Wimplicit-fallthrough -Wwrite-strings -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wstrict-prototypes -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wthread-safety -DLIBC_TEST=UNIT -MD -MT libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o -MF libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o.d -o libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o -c /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp:9:
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math.h:63:
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math/f16fmaf128.h:23:13: error: no member named 'f16fmaf128' in namespace '__llvm_libc_21_0_0_git::math'; did you mean 'dfmaf128'?
23 | using math::f16fmaf128;
| ~~~~~~^~~~~~~~~~
| dfmaf128
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/src/__support/math/dfmaf128.h:23:20: note: 'dfmaf128' declared here
23 | LIBC_INLINE double dfmaf128(float128 x, float128 y, float128 z) {
| ^
1 error generated.
[2/1635] Building CXX object libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o
FAILED: libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o
/usr/local/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_21_0_0_git -D_DEBUG -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc -isystem /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc/include -mabi=ilp32d -march=rv32imafdc --target=riscv32-unknown-linux-gnu --sysroot=/opt/riscv/sysroot --gcc-toolchain=/opt/riscv -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -std=gnu++17 --target=riscv32-unknown-linux-gnu -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_COPT_STRING_LENGTH_IMPL=element -DLIBC_COPT_FIND_FIRST_CHARACTER_IMPL=element -DLIBC_ADD_NULL_CHECKS -DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_DEFAULT -DLIBC_THREAD_MODE=LIBC_THREAD_MODE_PLATFORM -DLIBC_CONF_WCTYPE_MODE=LIBC_WCTYPE_MODE_ASCII -DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=100 -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ffixed-point -Wall -Wextra -Wconversion -Wno-sign-conversion -Wimplicit-fallthrough -Wwrite-strings -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wstrict-prototypes -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wthread-safety -DLIBC_TEST=UNIT -MD -MT libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o -MF libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o.d -o libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o -c /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp:9:
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math.h:63:
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math/f16fmaf128.h:23:13: error: no member named 'f16fmaf128' in namespace '__llvm_libc_21_0_0_git::math'; did you mean 'dfmaf128'?
23 | using math::f16fmaf128;
| ~~~~~~^~~~~~~~~~
| dfmaf128
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/src/__support/math/dfmaf128.h:23:20: note: 'dfmaf128' declared here
23 | LIBC_INLINE double dfmaf128(float128 x, float128 y, float128 z) {
| ^
1 error generated.
[3/1635] Running unit test libc.test.src.__support.CPP.bitset_test.__unit__
sh: line 1: /timer.6668: Permission denied
[==========] Running 11 tests from 1 test suite.
[ RUN ] LlvmLibcBitsetTest.SetBitForSizeEqualToOne
[ OK ] LlvmLibcBitsetTest.SetBitForSizeEqualToOne (387 us)
[ RUN ] LlvmLibcBitsetTest.SetsBitsForSizeEqualToTwo
[ OK ] LlvmLibcBitsetTest.SetsBitsForSizeEqualToTwo (299 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanEight
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanEight (137 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanSixteen
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanSixteen (127 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanThirtyTwo
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanThirtyTwo (133 us)
[ RUN ] LlvmLibcBitsetTest.DefaultHasNoSetBits
Step 8 (libc-unit-tests) failure: libc-unit-tests (failure)
@@@BUILD_STEP libc-unit-tests@@@
Running: ninja libc-unit-tests
[1/1635] Building CXX object libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o
FAILED: libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o
/usr/local/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_21_0_0_git -D_DEBUG -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc -isystem /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc/include -mabi=ilp32d -march=rv32imafdc --target=riscv32-unknown-linux-gnu --sysroot=/opt/riscv/sysroot --gcc-toolchain=/opt/riscv -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -std=gnu++17 --target=riscv32-unknown-linux-gnu -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_COPT_STRING_LENGTH_IMPL=element -DLIBC_COPT_FIND_FIRST_CHARACTER_IMPL=element -DLIBC_ADD_NULL_CHECKS -DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_DEFAULT -DLIBC_THREAD_MODE=LIBC_THREAD_MODE_PLATFORM -DLIBC_CONF_WCTYPE_MODE=LIBC_WCTYPE_MODE_ASCII -DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=100 -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ffixed-point -Wall -Wextra -Wconversion -Wno-sign-conversion -Wimplicit-fallthrough -Wwrite-strings -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wstrict-prototypes -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wthread-safety -DLIBC_TEST=UNIT -MD -MT libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o -MF libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o.d -o libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__NO_FMA_OPT.__build__.dir/shared_math_test.cpp.o -c /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp:9:
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math.h:63:
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math/f16fmaf128.h:23:13: error: no member named 'f16fmaf128' in namespace '__llvm_libc_21_0_0_git::math'; did you mean 'dfmaf128'?
23 | using math::f16fmaf128;
| ~~~~~~^~~~~~~~~~
| dfmaf128
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/src/__support/math/dfmaf128.h:23:20: note: 'dfmaf128' declared here
23 | LIBC_INLINE double dfmaf128(float128 x, float128 y, float128 z) {
| ^
1 error generated.
[2/1635] Building CXX object libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o
FAILED: libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o
/usr/local/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_21_0_0_git -D_DEBUG -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc -isystem /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc/include -mabi=ilp32d -march=rv32imafdc --target=riscv32-unknown-linux-gnu --sysroot=/opt/riscv/sysroot --gcc-toolchain=/opt/riscv -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -std=gnu++17 --target=riscv32-unknown-linux-gnu -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_COPT_STRING_LENGTH_IMPL=element -DLIBC_COPT_FIND_FIRST_CHARACTER_IMPL=element -DLIBC_ADD_NULL_CHECKS -DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_DEFAULT -DLIBC_THREAD_MODE=LIBC_THREAD_MODE_PLATFORM -DLIBC_CONF_WCTYPE_MODE=LIBC_WCTYPE_MODE_ASCII -DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=100 -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ffixed-point -Wall -Wextra -Wconversion -Wno-sign-conversion -Wimplicit-fallthrough -Wwrite-strings -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wstrict-prototypes -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wthread-safety -DLIBC_TEST=UNIT -MD -MT libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o -MF libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o.d -o libc/test/shared/CMakeFiles/libc.test.shared.shared_math_test.__unit__.__build__.dir/shared_math_test.cpp.o -c /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/shared/shared_math_test.cpp:9:
In file included from /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math.h:63:
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/shared/math/f16fmaf128.h:23:13: error: no member named 'f16fmaf128' in namespace '__llvm_libc_21_0_0_git::math'; did you mean 'dfmaf128'?
23 | using math::f16fmaf128;
| ~~~~~~^~~~~~~~~~
| dfmaf128
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/src/__support/math/dfmaf128.h:23:20: note: 'dfmaf128' declared here
23 | LIBC_INLINE double dfmaf128(float128 x, float128 y, float128 z) {
| ^
1 error generated.
[3/1635] Running unit test libc.test.src.__support.CPP.bitset_test.__unit__
sh: line 1: /timer.6668: Permission denied
[==========] Running 11 tests from 1 test suite.
[ RUN ] LlvmLibcBitsetTest.SetBitForSizeEqualToOne
[ OK ] LlvmLibcBitsetTest.SetBitForSizeEqualToOne (387 us)
[ RUN ] LlvmLibcBitsetTest.SetsBitsForSizeEqualToTwo
[ OK ] LlvmLibcBitsetTest.SetsBitsForSizeEqualToTwo (299 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanEight
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanEight (137 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanSixteen
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanSixteen (127 us)
[ RUN ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanThirtyTwo
[ OK ] LlvmLibcBitsetTest.SetsAllBitsForSizeLessThanThirtyTwo (133 us)
[ RUN ] LlvmLibcBitsetTest.DefaultHasNoSetBits
[ OK ] LlvmLibcBitsetTest.DefaultHasNoSetBits (219 us)
[ RUN ] LlvmLibcBitsetTest.SettingBitXDoesNotSetBitY
[ OK ] LlvmLibcBitsetTest.SettingBitXDoesNotSetBitY (42 ms)
[ RUN ] LlvmLibcBitsetTest.SettingBitXDoesNotResetBitY
[ OK ] LlvmLibcBitsetTest.SettingBitXDoesNotResetBitY (236 us)
[ RUN ] LlvmLibcBitsetTest.FlipTest
[ OK ] LlvmLibcBitsetTest.FlipTest (542 us)
[ RUN ] LlvmLibcBitsetTest.EqualTest
```
</details>
https://github.com/llvm/llvm-project/pull/177850
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