(x86 asm): Zero the high parts of the ?MM registers if available.

[catacomb] / base / dispatch.h

diff --git a/base/dispatch.h b/base/dispatch.h
index f778068..dae6a68 100644 (file)
--- a/base/dispatch.h
+++ b/base/dispatch.h
@@ -181,7 +181,8 @@ enum {
   CPUFEAT_ARM_V4,                      /* VFPv4 and/or SIMD v2 */
   CPUFEAT_ARM_D32,                     /* 32 double registers, not 16 */
   CPUFEAT_X86_RDRAND,                  /* Built-in entropy source */
-  CPUFEAT_ARM_AES                      /* AES instructions */
+  CPUFEAT_ARM_AES,                     /* AES instructions */
+  CPUFEAT_X86_AVX                      /* AVX 1 (i.e., 256-bit YMM regs) */
 };
 
 extern int cpu_feature_p(int /*feat*/);