[compiler-rt] [compiler-rt] Implement __extendxftf2 and __trunctfxf2 for x86_64 (PR #66918)

[Alexander Shaposhnikov via llvm-commits]

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@@ -20,14 +20,21 @@
 typedef float src_t;
 typedef uint32_t src_rep_t;
 #define SRC_REP_C UINT32_C
-static const int srcSigBits = 23;
+static const int srcBits = sizeof(src_t) * CHAR_BIT;
+static const int srcSigFracBits = 23;
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alexander-shaposhnikov wrote:

It definitely would, but I wanted to apply these changes in multiple phases 
(see also the description)  (partially to limit the scope of this PR and partially to avoid concurrently editing fp_lib.h (so that multiple PRs could make progress/land independently / a bit easier).

https://github.com/llvm/llvm-project/pull/66918