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suppress spurious -Waggressive-loop-optimizations warning

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Workaround for issue #88
This commit is contained in:
Matthijs van Duin
2021-07-31 02:05:12 +02:00
committed by Lion
parent 6b0d9b0f32
commit 91dbb5c8c2
1 changed files with 15 additions and 5 deletions
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minimp3.h
+15 -5
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@@ -881,12 +881,22 @@ static void L3_midside_stereo(float *left, int n)
int i = 0;
float *right = left + 576;
#if HAVE_SIMD
if (have_simd()) for (; i < n - 3; i += 4)
if (have_simd())
{
f4 vl = VLD(left + i);
f4 vr = VLD(right + i);
VSTORE(left + i, VADD(vl, vr));
VSTORE(right + i, VSUB(vl, vr));
for (; i < n - 3; i += 4)
{
f4 vl = VLD(left + i);
f4 vr = VLD(right + i);
VSTORE(left + i, VADD(vl, vr));
VSTORE(right + i, VSUB(vl, vr));
}
#ifdef __GNUC__
/* Workaround for spurious -Waggressive-loop-optimizations warning from gcc.
* For more info see: https://github.com/lieff/minimp3/issues/88
*/
if (__builtin_constant_p(n % 4 == 0) && n % 4 == 0)
return;
#endif
}
#endif /* HAVE_SIMD */
for (; i < n; i++)