Re: [Qemu-devel] [PATCH for-4.0 2/7] Remove support for compilers that can not do 128-bit arithmetics

[Thomas Huth]

On 2018-12-03 15:11, Richard Henderson wrote:
> On 12/3/18 8:05 AM, Thomas Huth wrote:
>> +++ b/include/qemu/host-utils.h
>> @@ -28,7 +28,6 @@
>>  
>>  #include "qemu/bswap.h"
>>  
>> -#ifdef CONFIG_INT128
>>  static inline void mulu64(uint64_t *plow, uint64_t *phigh,
>>                            uint64_t a, uint64_t b)
>>  {
>> @@ -76,35 +75,6 @@ static inline int divs128(int64_t *plow, int64_t *phigh, 
>> int64_t divisor)
>>          return result != *plow;
>>      }
>>  }
>> -#else
>> -void muls64(uint64_t *phigh, uint64_t *plow, int64_t a, int64_t b);
>> -void mulu64(uint64_t *phigh, uint64_t *plow, uint64_t a, uint64_t b);
> 
> No, because __int128 support requires a 64-bit host.
> This will not compile for a 32-bit host.

Oops, my bad, you're right, of course. This would have been too easy, I
guess ... So it seems that the only thing that we could do here is to
get rid of the Clang version check in the configure script...

 Thomas