x86_emulate: Fix build with some versions of gcc targeting i386.

Signed-off-by: Keir Fraser <keir@xen.org>

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emulate/x86_emulate.c
index 7ad0dd5d2f92363da09320c03ee1e43e614d0d2f..d6586d6944ae94daa2a1661d044a0dac870ca2d3 100644 (file)
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -2101,9 +2101,11 @@ x86_emulate(
         case 4:
             _regs.edx = (uint32_t)(((int32_t)_regs.eax < 0) ? -1 : 0);
             break;
+#ifdef __x86_64__ /* compile warning with some versions of 32-bit gcc */
         case 8:
             _regs.edx = ((int64_t)_regs.eax < 0) ? -1 : 0;
             break;
+#endif
         }
         break;