diff options
| author | Søren Sandmann Pedersen <ssp@redhat.com> | 2012-07-01 16:59:53 -0400 |
|---|---|---|
| committer | Søren Sandmann Pedersen <ssp@redhat.com> | 2012-07-02 18:21:21 -0400 |
| commit | f9c91ee2f27eaea68d8c3a130bf7d4bc0c860834 (patch) | |
| tree | 48506151ee52c0643f05ab426ba39bda139a4bd6 /configure.ac | |
| parent | cd7ecf548a9e8115226bf0fec174f3abc54becb5 (diff) | |
Use a compile-time constant for the "K" constraint in the MMX detection.
When compiling with -O0, gcc doesn't understand that in
signed char x = 0;
...
asm ("...",
: "K" (x));
x is constant. Fix this by using an immediate constant instead of a
variable.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 2b9d1ba2..36f423ef 100644 --- a/configure.ac +++ b/configure.ac @@ -351,12 +351,11 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ int main () { __m64 v = _mm_cvtsi32_si64 (1); __m64 w; - signed char x = 0; /* Some versions of clang will choke on K */ asm ("pshufw %2, %1, %0\n\t" : "=y" (w) - : "y" (v), "K" (x) + : "y" (v), "K" (5) ); return _mm_cvtsi64_si32 (v); |