I'm experiencing an INTERNAL COMPILER ERROR in MSVC-2017
(latest version 19.13.26129 for x86) when compiling
volk/lib/volk_machine_sse2_mmx.c.
Function volk_32f_index_max_16u_a_sse(), ref:
https://www.gnuradio.org/doc/doxygen-3.7.2.1/volk__32f__index__max__16u_8h_source.html
at lines 70 - 122.
Is anybody else having troubles with this?
A fix for me was to remove all '-O..' flags when compiling
this file. No problems with any other files. Or use the attached patch.
This "optimizer bug" has been reported here:
https://developercommunity.visualstudio.com/content/problem/237802/optimizer-bug-still-persists.html
--
--gv
--- a/kernels/volk/volk_32f_index_max_16u.h 2016-07-28 15:53:26
+++ b/kernels/volk/volk_32f_index_max_16u.h 2018-06-25 11:28:31
@@ -143,6 +143,23 @@
#include <xmmintrin.h>
+/*
+ * To bypass an Optimizer bug in MSVC-2017.
+ * Ref:
+ *
https://developercommunity.visualstudio.com/content/problem/215602/new-optimizer-code-generation-bug.html
+ *
+ * Turn off all optimizations for this function.
+ */
+#if defined(_MSC_VER) && !defined(__clang__)
+ #define OPTIMIZE_OFF() __pragma (optimize ("g", off));
+ #define OPTIMIZE_DEF() __pragma (optimize ("", on));
+#else
+ #define OPTIMIZE_OFF()
+ #define OPTIMIZE_DEF()
+#endif
+
+OPTIMIZE_OFF()
+
static inline void
volk_32f_index_max_16u_a_sse(uint16_t* target, const float* src0,
uint32_t num_points)
@@ -200,6 +217,8 @@
target[0] = (uint16_t)index;
}
+OPTIMIZE_DEF()
+
#endif /*LV_HAVE_SSE*/
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