Move BF16 to basics.h for easier access, and use that typedef.

PiperOrigin-RevId: 691422334

compression/BUILD.bazel

@@ -88,6 +88,7 @@ cc_library(
         "shared.h",
     ],
     deps = [
+        "//:basics",
         "@highway//:hwy",
         "@highway//:stats",
         "@highway//hwy/contrib/sort:vqsort",
@@ -112,6 +113,7 @@ cc_library(
     hdrs = ["shared.h"],
     textual_hdrs = ["sfp-inl.h"],
     deps = [
+        "//:basics",
         "@highway//:hwy",
     ],
 )
@@ -198,6 +200,7 @@ cc_library(
         ":nuq",
         ":sfp",
         "//:allocator",
+        "//:basics",
         "@highway//:hwy",
         "@highway//:nanobenchmark",
         "@highway//:profiler",

compression/shared.h

@@ -25,13 +25,14 @@
 #include <complex>
 #include <cstdio>
 
+// IWYU pragma: begin_exports
+#include "util/basics.h"  // BF16
 #include "hwy/aligned_allocator.h"
 #include "hwy/base.h"  // HWY_INLINE
+// IWYU pragma: end_exports
 
 namespace gcpp {
 
-using BF16 = hwy::bfloat16_t;
-
 // Switching Floating Point: a hybrid 8-bit float representation of bf16/f32
 // inputs that combines the advantages of e4m3 and e5m2 into a single format.
 // It supports seeking at a granularity of 1 and decoding to bf16/f32.

util/basics.h

@@ -20,7 +20,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include "hwy/base.h"  // HWY_IS_MSAN
+#include "hwy/base.h"
 // IWYU pragma: end_exports
 
 #if HWY_IS_MSAN
@@ -29,6 +29,8 @@
 
 namespace gcpp {
 
+using BF16 = hwy::bfloat16_t;
+
 static inline void MaybeCheckInitialized(const void* ptr, size_t size) {
 #if HWY_IS_MSAN
   __msan_check_mem_is_initialized(ptr, size);