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[libc][math][c++23] Add nanbf16 math function #153995

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Merged
merged 18 commits into from
Aug 23, 2025
Merged

[libc][math][c++23] Add nanbf16 math function #153995

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b58785d
feat: implement {,u}fromfp{,x}bf16 math functions
krishna2803 Aug 16, 2025
0a2b527
chore: add tests for {,u}fromfp{,x}bf16 math functions
krishna2803 Aug 16, 2025
baaf0e0
chore: update entrypoints
krishna2803 Aug 16, 2025
733f4f1
chore: update docs
krishna2803 Aug 16, 2025
4a80312
feat: implement next{after,down,toward,up}bf16 math functions
krishna2803 Aug 17, 2025
446e637
chore: add smoke tests for next{after,down,toward,up}bf16 math functions
krishna2803 Aug 17, 2025
a98b928
chore: update entrypoints
krishna2803 Aug 17, 2025
12f1923
docs: add next{after,down,toward,up}bf16 math functions
krishna2803 Aug 17, 2025
6f8d84d
feat: implement {get,set}payloadbf16 and setpayloadsigbf16 math funct…
krishna2803 Aug 17, 2025
c8f4380
chore: implement smoke tests for {get,set}payloadbf16 and setpayloads…
krishna2803 Aug 17, 2025
8ea9354
fix: add correct static_cast for fputil::getpload for bfloat16
krishna2803 Aug 17, 2025
fc2b6eb
chore: update entrypoints
krishna2803 Aug 17, 2025
70e4463
docs: add {get,set}payloadbf16 and setpayloadsigbf16 math functions
krishna2803 Aug 17, 2025
ea9625e
feat: implement nanbf16 math function
krishna2803 Aug 17, 2025
ae0e616
chore: add smoke tests for nanbf16 math function
krishna2803 Aug 17, 2025
27364c5
chore: update entrypoints
krishna2803 Aug 17, 2025
250cfea
docs: add nanbf16
krishna2803 Aug 17, 2025
a5013c7
Merge branch 'main' into users/krishna2803/nanbf16
krishna2803 Aug 23, 2025
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12 changes: 12 additions & 0 deletions libc/config/baremetal/aarch64/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -785,9 +785,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
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12 changes: 12 additions & 0 deletions libc/config/baremetal/arm/entrypoints.txt
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -788,9 +788,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
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12 changes: 12 additions & 0 deletions libc/config/baremetal/riscv/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -788,9 +788,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
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12 changes: 12 additions & 0 deletions libc/config/darwin/aarch64/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -618,9 +618,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
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13 changes: 12 additions & 1 deletion libc/config/darwin/x86_64/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -261,10 +261,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16

libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

set(TARGET_LLVMLIBC_ENTRYPOINTS
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12 changes: 12 additions & 0 deletions libc/config/gpu/amdgpu/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -644,9 +644,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

set(TARGET_LLVMLIBC_ENTRYPOINTS
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12 changes: 12 additions & 0 deletions libc/config/gpu/nvptx/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -645,9 +645,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

set(TARGET_LLVMLIBC_ENTRYPOINTS
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12 changes: 12 additions & 0 deletions libc/config/linux/aarch64/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -872,9 +872,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
Expand Down
12 changes: 12 additions & 0 deletions libc/config/linux/arm/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -488,9 +488,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

set(TARGET_LLVMLIBC_ENTRYPOINTS
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12 changes: 12 additions & 0 deletions libc/config/linux/riscv/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -891,9 +891,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
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12 changes: 12 additions & 0 deletions libc/config/linux/x86_64/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -923,9 +923,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

if(LIBC_TYPES_HAS_FLOAT128)
Expand Down
12 changes: 12 additions & 0 deletions libc/config/windows/entrypoints.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -334,9 +334,21 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
libc.src.math.fminimum_magbf16
libc.src.math.fminimum_mag_numbf16
libc.src.math.fminimum_numbf16
libc.src.math.fromfpbf16
libc.src.math.fromfpxbf16
libc.src.math.getpayloadbf16
libc.src.math.nanbf16
libc.src.math.nextafterbf16
libc.src.math.nextdownbf16
libc.src.math.nexttowardbf16
libc.src.math.nextupbf16
libc.src.math.roundbf16
libc.src.math.roundevenbf16
libc.src.math.setpayloadbf16
libc.src.math.setpayloadsigbf16
libc.src.math.truncbf16
libc.src.math.ufromfpbf16
libc.src.math.ufromfpxbf16
)

set(TARGET_LLVMLIBC_ENTRYPOINTS
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24 changes: 12 additions & 12 deletions libc/docs/headers/math/index.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -181,13 +181,13 @@ Basic Operations
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| frexp | |check| | |check| | |check| | |check| | |check| | | 7.12.6.7 | F.10.3.7 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| fromfp | |check| | |check| | |check| | |check| | |check| | | 7.12.9.10 | F.10.6.10 |
| fromfp | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.9.10 | F.10.6.10 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| fromfpx | |check| | |check| | |check| | |check| | |check| | | 7.12.9.11 | F.10.6.11 |
| fromfpx | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.9.11 | F.10.6.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| fsub | N/A | |check| | |check| | N/A | |check|\* | N/A | 7.12.14.2 | F.10.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| getpayload | |check| | |check| | |check| | |check| | |check| | | F.10.13.1 | N/A |
| getpayload | |check| | |check| | |check| | |check| | |check| | |check| | F.10.13.1 | N/A |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| ilogb | |check| | |check| | |check| | |check| | |check| | | 7.12.6.8 | F.10.3.8 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
Expand All @@ -211,17 +211,17 @@ Basic Operations
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| modf | |check| | |check| | |check| | |check| | |check| | | 7.12.6.18 | F.10.3.18 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nan | |check| | |check| | |check| | |check| | |check| | | 7.12.11.2 | F.10.8.2 |
| nan | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.11.2 | F.10.8.2 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nearbyint | |check| | |check| | |check| | |check| | |check| | | 7.12.9.3 | F.10.6.3 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nextafter | |check| | |check| | |check| | |check| | |check| | | 7.12.11.3 | F.10.8.3 |
| nextafter | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.11.3 | F.10.8.3 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nextdown | |check| | |check| | |check| | |check| | |check| | | 7.12.11.6 | F.10.8.6 |
| nextdown | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.11.6 | F.10.8.6 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nexttoward | |check| | |check| | |check| | |check| | N/A | | 7.12.11.4 | F.10.8.4 |
| nexttoward | |check| | |check| | |check| | |check| | N/A | |check| | 7.12.11.4 | F.10.8.4 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| nextup | |check| | |check| | |check| | |check| | |check| | | 7.12.11.5 | F.10.8.5 |
| nextup | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.11.5 | F.10.8.5 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| remainder | |check| | |check| | |check| | |check| | |check| | | 7.12.10.2 | F.10.7.2 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
Expand All @@ -237,19 +237,19 @@ Basic Operations
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| scalbn | |check| | |check| | |check| | |check| | |check| | | 7.12.6.19 | F.10.3.19 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| setpayload | |check| | |check| | |check| | |check| | |check| | | F.10.13.2 | N/A |
| setpayload | |check| | |check| | |check| | |check| | |check| | |check| | F.10.13.2 | N/A |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| setpayloadsig | |check| | |check| | |check| | |check| | |check| | | F.10.13.3 | N/A |
| setpayloadsig | |check| | |check| | |check| | |check| | |check| | |check| | F.10.13.3 | N/A |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| totalorder | |check| | |check| | |check| | |check| | |check| | | F.10.12.1 | N/A |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| totalordermag | |check| | |check| | |check| | |check| | |check| | | F.10.12.2 | N/A |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| trunc | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.9.9 | F.10.6.9 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| ufromfp | |check| | |check| | |check| | |check| | |check| | | 7.12.9.10 | F.10.6.10 |
| ufromfp | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.9.10 | F.10.6.10 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
| ufromfpx | |check| | |check| | |check| | |check| | |check| | | 7.12.9.11 | F.10.6.11 |
| ufromfpx | |check| | |check| | |check| | |check| | |check| | |check| | 7.12.9.11 | F.10.6.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+

Higher Math Functions
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