--- old/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp	2018-09-12 16:10:18.798974194 -0700
+++ new/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp	2018-09-12 16:10:18.642974196 -0700
@@ -3765,24 +3765,14 @@
     if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
       __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
     }
-    if (UseAVX > 0) {
-      __ vnegatess(dest->as_xmm_float_reg(), dest->as_xmm_float_reg(),
-                   ExternalAddress((address)float_signflip_pool));
-    } else {
-      __ xorps(dest->as_xmm_float_reg(),
-               ExternalAddress((address)float_signflip_pool));
-    }
+    __ xorps(dest->as_xmm_float_reg(),
+             ExternalAddress((address)float_signflip_pool));
   } else if (dest->is_double_xmm()) {
     if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
       __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
     }
-    if (UseAVX > 0) {
-      __ vnegatesd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg(),
-                   ExternalAddress((address)double_signflip_pool));
-    } else {
-      __ xorpd(dest->as_xmm_double_reg(),
-               ExternalAddress((address)double_signflip_pool));
-    }
+    __ xorpd(dest->as_xmm_double_reg(),
+             ExternalAddress((address)double_signflip_pool));
   } else if (left->is_single_fpu() || left->is_double_fpu()) {
     assert(left->fpu() == 0, "arg must be on TOS");
     assert(dest->fpu() == 0, "dest must be TOS");