host/include/i386: Implement clmul.h

Detect PCLMUL in cpuinfo; implement the accel hook.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

util/cpuinfo-i386.c

@@ -39,6 +39,7 @@ unsigned __attribute__((constructor)) cpuinfo_init(void)
         info |= (c & bit_SSE4_1 ? CPUINFO_SSE4 : 0);
         info |= (c & bit_MOVBE ? CPUINFO_MOVBE : 0);
         info |= (c & bit_POPCNT ? CPUINFO_POPCNT : 0);
+        info |= (c & bit_PCLMUL ? CPUINFO_PCLMUL : 0);
 
         /* Our AES support requires PSHUFB as well. */
         info |= ((c & bit_AES) && (c & bit_SSSE3) ? CPUINFO_AES : 0);