[libc][math] Refactor exp2f implementation to header-only in src/__support/math folder.

[bassiounix]

Part of #147386

in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450

[bassiounix]

• [libc][math] Refactor fmaf16 implementation to header-only in src/__support/math folder. #163977
• [libc][math] Refactor fmaf implementation to header-only in src/__support/math folder. #163970
• [libc][math] Refactor fma implementation to header-only in src/__support/math folder. #163968
• [libc][math] Refactor expm1f16 implementation to header-only in src/__support/math folder. #162132
• [libc][math] Refactor expm1f implementation to header-only in src/__support/math folder. #162131
• [libc][math] Refactor expm1 implementation to header-only in src/__support/math folder. #162127
• [libc][math] Refactor exp2m1f16 implementation to header-only in src/__support/math folder. #162019
• [libc][math] Refactor exp2m1f implementation to header-only in src/__support/math folder. #162017
• [libc][math] Refactor exp2f16 implementation to header-only in src/__support/math folder. #161993
• [libc][math] Refactor exp2f implementation to header-only in src/__support/math folder. #161992 👈 (View in Graphite)
• [libc][math] Refactor exp2 implementation to header-only in src/__support/math folder. #161297
• [libc][math] Refactor exp10m1f16 implementation to header-only in src/__support/math folder. #161119
• [libc][math] Refactor exp10m1f implementation to header-only in src/__support/math folder. #159897
• [libc][math] Refactor dsqrtl implementation to header-only in src/__support/math folder. #154868
• [libc][math] Refactor cospif16 implementation to header-only in src/__support/math folder. #154222
• [libc][math] Refactor cospif implementation to header-only in src/__support/math folder. #154215
• [libc][math] Refactor coshf16 implementation to header-only in src/__support/math folder. #153582
• [libc][math] Refactor coshf implementation to header-only in src/__support/math folder. #153427
• [libc][math] Refactor cosf16 implementation to header-only in src/__support/math folder. #152871
• [libc][math] Refactor cosf implementation to header-only in src/__support/math folder. #152069
• [libc][math] Refactor cos implementation to header-only in src/__support/math folder. #151883
• [libc][math] Refactor cbrtf implementation to header-only in src/__support/math folder. #151846
• [libc][math] Refactor cbrt implementation to header-only in src/__support/math folder. #151837
• [libc][math] Refactor atanhf16 implementation to header-only in src/__support/math folder. #151779
• [libc][math] Refactor atanhf implementation to header-only in src/__support/math folder. #151399
• [libc][math] Refactor atan2f128 implementation to header-only in src/__support/math folder. #151012
• [libc][math] Refactor atan2f implementation to header-only in src/__support/math folder. #150993
• [libc][math] Refactor atan2 implementation to header-only in src/__support/math folder. #150968
• [libc][math] Refactor atanf16 implementation to header-only in src/__support/math folder. #150868
• [libc][math] Refactor atanf implementation to header-only in src/__support/math folder. #150854
• [libc][math] Refactor atan implementation to header-only in src/__support/math folder. #150852
• [libc][math] Refactor asinhf16 implementation to header-only in src/__support/math folder. #150849
• [libc][math] Refactor asinhf implementation to header-only in src/__support/math folder. #150843
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[bassiounix]

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• Oct 6, 6:06 PM UTC: Graphite rebased this pull request as part of a merge.
• Oct 6, 6:17 PM UTC: Graphite rebased this pull request as part of a merge.
• Oct 6, 6:23 PM UTC: @bassiounix merged this pull request with Graphite.