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more informative warnings

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This commit is contained in:
conrad
2025-07-23 12:00:50 +10:00
parent 03ee00c429
commit 0bb7d88a3e
1 changed files with 11 additions and 2 deletions
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include/armadillo_bits/typedef_elem.hpp
+11 -2
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@@ -145,6 +145,7 @@ typedef void* void_ptr;
#define ARMA_GOOD_FP16
#endif
#elif defined(__x86_64__) || defined(__i386__)
// TODO: seems that F16C extensions (previously known as CVT16) also provide "good enough" fp16 support
#if defined(__AVX512FP16__)
// need AVX512-FP16 extensions for native FP16 support
#define ARMA_GOOD_FP16
@@ -160,13 +161,21 @@ typedef void* void_ptr;
#endif
#if defined(ARMA_FORCE_USE_FP16) && !defined(ARMA_GOOD_FP16)
#pragma message ("WARNING: hardware support for fp16 not detected; use of fp16 can be very slow")
#if defined(__GNUG__) || defined(__clang__)
#pragma message ("WARNING: hardware support for fp16 not detected; emulated fp16 can be slow; try adding -march=native to compiler flags")
#else
#pragma message ("WARNING: hardware support for fp16 not detected; emulated fp16 can be slow")
#endif
#endif
#else
#if defined(ARMA_FORCE_USE_FP16)
#pragma message ("WARNING: C++ support for fp16 not detected")
#if defined(__GNUG__) || defined(__clang__)
#pragma message ("WARNING: C++ support for fp16 not detected; try adding -std=c++23 to compiler flags")
#else
#pragma message ("WARNING: C++ support for fp16 not detected")
#endif
#endif
#undef ARMA_GOOD_FP16