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[GPU] Explicitly export bfloat16 compiler-rt conversion builtins from codonrt - #835

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arshajii merged 1 commit into
exaloop:developfrom
BI71317:pr-add-bf16-builtin
Jul 5, 2026
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[GPU] Explicitly export bfloat16 compiler-rt conversion builtins from codonrt#835
arshajii merged 1 commit into
exaloop:developfrom
BI71317:pr-add-bf16-builtin

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@BI71317 BI71317 commented Jul 5, 2026 •
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fixes #834

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Add bfloat16 compiler runtime conversion helper symbols to COMPILER_RT_DEFAULT_VIS_SYMBOLS in CMakeLists.txt.

This makes Codon's copied libclang_rt.builtins.default.a mark the bf16 conversion helpers default-visible before linking them into libcodonrt.so.

Added symbols include:

__truncdfbf2
__truncsfbf2
__trunctfbf2
__truncxfbf2
__trunchfbf2
__extendbfsf2

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BI71317 requested review from arshajii and inumanag as code owners July 5, 2026 09:24
@cla-bot cla-bot Bot added the cla-signed label Jul 5, 2026
@arshajii

arshajii commented Jul 5, 2026

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Thanks, LGTM

@arshajii
arshajii merged commit 3217c3e into exaloop:develop Jul 5, 2026
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@BI71317
BI71317 deleted the pr-add-bf16-builtin branch July 6, 2026 00:37
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@arshajii arshajii Awaiting requested review from arshajii arshajii is a code owner
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[GPU] bfloat16 GPU kernels can fail to link when libgcc_s does not provide bf16 conversion builtins

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