[libc] [llvm] [libc] Move printf long double to simple calc (PR #75414)

[via llvm-commits]

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@@ -152,15 +157,17 @@ LIBC_INLINE constexpr uint32_t ceil_log10_pow2(const uint32_t e) {
   return log10_pow2(e) + 1;
 }
 
+LIBC_INLINE constexpr uint32_t div_ceil(const uint32_t num,
+                                        const uint32_t denom) {
+  return (num + (denom - 1)) / denom;
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lntue wrote:

Can you double check if  this division is optimized to multiplication or shifts in the generated codes since `BLOCK_SIZE` is constant?

https://github.com/llvm/llvm-project/pull/75414