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DYNAMIC_BMI2 enabled for clang 

clang only claims compatibility with gcc 4.2.
Consequently, recent patch which reserved DYNAMIC_BMI2 for gcc >= 4.8
also disabled it for clang.

fix : __clang__ is now enough to enable DYNAMIC_BMI2
(associated with other existing conditions : x64/x64, !bmi2)
dev
Yann Collet 2018-03-04 16:05:59 -08:00
parent 3ba307b240
commit d02b44cf55
1 changed files with 5 additions and 2 deletions
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7
lib/common/compiler.h
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@ -74,8 +74,11 @@
* Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default.
*/
#ifndef DYNAMIC_BMI2
#if defined(__GNUC__) && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) \
&& (defined(__x86_64__) || defined(_M_X86)) && !defined(__BMI2__)
#if defined(__clang__) \
|| (defined(__GNUC__) \
&& (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) \
&& (defined(__x86_64__) || defined(_M_X86)) \
&& !defined(__BMI2__)
# define DYNAMIC_BMI2 1
#else
# define DYNAMIC_BMI2 0