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[libc][math] Implement C23 half precision pow function #159906

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[libc][math] Implement C23 half precision pow function #159906

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f433dfd
[libc][math] Implement C23 half precision pow function
AnonMiraj Sep 20, 2025
21275a3
fix formatting
AnonMiraj Sep 20, 2025
7db8703
add missing argument in math.yml
AnonMiraj Sep 23, 2025
7a8db3f
remove optimzation option
AnonMiraj Sep 23, 2025
7bb9c40
make tests exaustive
AnonMiraj Sep 24, 2025
28d52f6
update log poly to double
AnonMiraj Sep 24, 2025
13dd3ff
fix powf16 tests
AnonMiraj Oct 11, 2025
ba92b59
update powf16 approach
AnonMiraj Nov 2, 2025
561dd53
update tests
AnonMiraj Nov 2, 2025
fc0f59e
Merge branch 'main' into origin/add_powf16
AnonMiraj Nov 2, 2025
2a83767
fix build failure
AnonMiraj Nov 3, 2025
9652c18
handle LIBC_TARGET_CPU_HAS_FMA_DOUBLE
AnonMiraj Nov 9, 2025
54e3d60
ensure f16 literals are used in smoke test
AnonMiraj Nov 9, 2025
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1 change: 1 addition & 0 deletions libc/config/gpu/amdgpu/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -451,6 +451,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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1 change: 1 addition & 0 deletions libc/config/gpu/nvptx/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -452,6 +452,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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1 change: 1 addition & 0 deletions libc/config/linux/aarch64/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -592,6 +592,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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1 change: 1 addition & 0 deletions libc/config/linux/arm/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -405,6 +405,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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1 change: 1 addition & 0 deletions libc/config/linux/riscv/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -600,6 +600,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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1 change: 1 addition & 0 deletions libc/config/linux/x86_64/entrypoints.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -632,6 +632,7 @@ set(TARGET_LIBM_ENTRYPOINTS
libc.src.math.nextupl
libc.src.math.pow
libc.src.math.powf
libc.src.math.powf16
libc.src.math.remainder
libc.src.math.remainderf
libc.src.math.remainderl
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7 changes: 7 additions & 0 deletions libc/include/math.yaml
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Expand Up @@ -2162,6 +2162,13 @@ functions:
arguments:
- type: float
- type: float
- name: powf16
standards:
- stdc
return_type: _Float16
arguments:
- type: _Float16
- type: _Float16
- name: powi
standards: llvm_libc_ext
return_type: double
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1 change: 1 addition & 0 deletions libc/src/math/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -479,6 +479,7 @@ add_math_entrypoint_object(nextupbf16)

add_math_entrypoint_object(pow)
add_math_entrypoint_object(powf)
add_math_entrypoint_object(powf16)
add_math_entrypoint_object(powi)
add_math_entrypoint_object(powif)

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22 changes: 22 additions & 0 deletions libc/src/math/generic/CMakeLists.txt
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Expand Up @@ -1626,6 +1626,28 @@ add_entrypoint_object(
libc.src.__support.math.expxf16_utils
)

add_entrypoint_object(
powf16
SRCS
powf16.cpp
HDRS
../powf16.h
DEPENDS
libc.hdr.errno_macros
libc.hdr.fenv_macros
libc.src.__support.CPP.bit
libc.src.__support.FPUtil.fenv_impl
libc.src.__support.FPUtil.fp_bits
libc.src.__support.FPUtil.polyeval
libc.src.__support.FPUtil.cast
libc.src.__support.FPUtil.multiply_add
libc.src.__support.FPUtil.nearest_integer
libc.src.__support.FPUtil.sqrt
libc.src.__support.macros.optimization
libc.src.__support.math.exp10f_utils
libc.src.__support.math.common_constants
)

add_entrypoint_object(
powf
SRCS
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