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The data is not unaligned, it will be aligned at the boundary natural for its size or larger. (Typically at a sizeof(void*) boundary.) It is misaligned in the sense that it isn't at the 16 byte boundary we require.

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Steve Checkoway
2006-12-11 10:33:35 +00:00
parent 380868986f
commit d5e67ae508
1 changed files with 3 additions and 3 deletions
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stepmania/src/archutils/Darwin/VectorHelper.cpp
+3 -3
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@@ -47,7 +47,7 @@ void Vector::FastSoundWrite( int32_t *dest, const int16_t *src, unsigned size, s
vSInt32 load1Dest = vec_ld( 0, dest ); vSInt32 load1Dest = vec_ld( 0, dest );
vSInt32 store = (vSInt32)(0); vSInt32 store = (vSInt32)(0);
// If dest is unaligned, pull first loop iteration out. // If dest is misaligned, pull first loop iteration out.
if( intptr_t(dest) & 0xF ) if( intptr_t(dest) & 0xF )
{ {
vSInt16 load2Src = vec_ld( 15, src ); vSInt16 load2Src = vec_ld( 15, src );
@@ -213,7 +213,7 @@ void Vector::FastSoundWrite( int32_t *dest, const int16_t *src, unsigned size, s
size -= 8; size -= 8;
} }
// Store the remainder of the vector, if it was unaligned. // Store the remainder of the vector, if it was misaligned.
if( index < 0 ) if( index < 0 )
{ {
store = vec_perm( store, store, storeMask ); store = vec_perm( store, store, storeMask );
@@ -224,7 +224,7 @@ void Vector::FastSoundWrite( int32_t *dest, const int16_t *src, unsigned size, s
} }
} }
} }
/* If we account for both unaligned dest and src, there is really no way to /* If we account for both misaligned dest and src, there is really no way to
* do this in vector code so do the last at most 7 elements in scalar code. */ * do this in vector code so do the last at most 7 elements in scalar code. */
while( size-- ) while( size-- )
*(dest++) += *(src++) * volume; *(dest++) += *(src++) * volume;