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Posted to commits@tvm.apache.org by GitBox <gi...@apache.org> on 2022/06/27 17:05:59 UTC

[GitHub] [tvm] AndrewZhaoLuo commented on a diff in pull request #11906: set FLUSH_TO_ZERO ON by default

AndrewZhaoLuo commented on code in PR #11906:
URL: https://github.com/apache/tvm/pull/11906#discussion_r907607721


##########
src/target/codegen.cc:
##########
@@ -54,6 +55,13 @@ runtime::Module Build(IRModule mod, Target target) {
 
   // the build function.
   std::string build_f_name = "target.build." + target->kind->name;
+  if (target->kind->name == "llvm" && !(_mm_getcsr() & 0x8040)) {
+    LOG(WARNING) << "Set FLUSH_TO_ZERO ON by default in Build on LLVM."<< std::endl;
+    //DAZ
+    _mm_setcsr( _mm_getcsr() | 0x0040 );
+    //FTZ
+    _mm_setcsr( _mm_getcsr() | 0x8000 );
+  }

Review Comment:
   Is this portable?



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