configure: Rename cmov processor capability to i686

The goal is to make the capapility slightly more general and have it
cover the availability of the nopl instruction in addition to cmov.

configure

@@ -1253,7 +1253,6 @@ HAVE_LIST="
     cdio_paranoia_h
     cdio_paranoia_paranoia_h
     closesocket
-    cmov
     CommandLineToArgvW
     cpunop
     CryptGenRandom
@@ -1287,6 +1286,7 @@ HAVE_LIST="
     gettimeofday
     gnu_as
     gsm_h
+    i686
     ibm_asm
     inet_aton
     io_h
@@ -1470,7 +1470,7 @@ ppc4xx_deps="ppc"
 
 vis_deps="sparc"
 
-x86_64_suggest="cmov fast_cmov"
+x86_64_suggest="fast_cmov i686"
 
 amd3dnow_deps="mmx"
 amd3dnowext_deps="amd3dnow"
@@ -2870,21 +2870,21 @@ elif enabled x86; then
             cpuflags="-march=$cpu"
             disable mmx
         ;;
-        # targets that do NOT support conditional mov (cmov)
+        # targets that do NOT support nopl and conditional mov (cmov)
         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
             cpuflags="-march=$cpu"
-            disable cmov
+            disable i686
         ;;
-        # targets that do support conditional mov (cmov)
+        # targets that do support nopl and conditional mov (cmov)
         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
             cpuflags="-march=$cpu"
-            enable cmov
+            enable i686
             enable fast_cmov
         ;;
         # targets that do support conditional mov but on which it's slow
         pentium4|pentium4m|prescott|nocona)
             cpuflags="-march=$cpu"
-            enable cmov
+            enable i686
             disable fast_cmov
         ;;
     esac
@@ -3895,7 +3895,7 @@ if enabled x86; then
     echo "SSSE3 enabled             ${ssse3-no}"
     echo "AVX enabled               ${avx-no}"
     echo "FMA4 enabled              ${fma4-no}"
-    echo "CMOV enabled              ${cmov-no}"
+    echo "i686 features enabled     ${i686-no}"
     echo "CMOV is fast              ${fast_cmov-no}"
     echo "EBX available             ${ebx_available-no}"
     echo "EBP available             ${ebp_available-no}"

libavcodec/x86/mathops.h

@@ -68,7 +68,7 @@ static av_always_inline av_const int64_t MUL64(int a, int b)
 
 #endif /* ARCH_X86_32 */
 
-#if HAVE_CMOV
+#if HAVE_I686
 /* median of 3 */
 #define mid_pred mid_pred
 static inline av_const int mid_pred(int a, int b, int c)
@@ -87,9 +87,7 @@ static inline av_const int mid_pred(int a, int b, int c)
     );
     return i;
 }
-#endif
 
-#if HAVE_CMOV
 #define COPY3_IF_LT(x, y, a, b, c, d)\
 __asm__ volatile(\
     "cmpl  %0, %3       \n\t"\
@@ -99,7 +97,7 @@ __asm__ volatile(\
     : "+&r" (x), "+&r" (a), "+r" (c)\
     : "r" (y), "r" (b), "r" (d)\
 );
-#endif
+#endif /* HAVE_I686 */
 
 #define MASK_ABS(mask, level)                   \
     __asm__ ("cltd                   \n\t"      \