From 2fdf9cb2fb9f2f9c1bec53a5a72287bbf12471b7 Mon Sep 17 00:00:00 2001 From: Falk Hüffner Date: Sun, 19 Jun 2005 21:46:14 +0000 Subject: Communicate proper aliasing to gcc (needed for 4.1). Originally committed as revision 4384 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/alpha/simple_idct_alpha.c | 39 ++++++++++++++++-------------------- 1 file changed, 17 insertions(+), 22 deletions(-) (limited to 'libavcodec/alpha/simple_idct_alpha.c') diff --git a/libavcodec/alpha/simple_idct_alpha.c b/libavcodec/alpha/simple_idct_alpha.c index 889fd2ae11..293a2f9702 100644 --- a/libavcodec/alpha/simple_idct_alpha.c +++ b/libavcodec/alpha/simple_idct_alpha.c @@ -235,25 +235,22 @@ static inline void idct_col2(DCTELEM *col) { int i; uint64_t l, r; - uint64_t *lcol = (uint64_t *) col; for (i = 0; i < 8; ++i) { - int_fast32_t a0 = col[0] + (1 << (COL_SHIFT - 1)) / W4; + int_fast32_t a0 = col[i] + (1 << (COL_SHIFT - 1)) / W4; a0 *= W4; - col[0] = a0 >> COL_SHIFT; - ++col; + col[i] = a0 >> COL_SHIFT; } - l = lcol[0]; - r = lcol[1]; - lcol[ 2] = l; lcol[ 3] = r; - lcol[ 4] = l; lcol[ 5] = r; - lcol[ 6] = l; lcol[ 7] = r; - lcol[ 8] = l; lcol[ 9] = r; - lcol[10] = l; lcol[11] = r; - lcol[12] = l; lcol[13] = r; - lcol[14] = l; lcol[15] = r; + l = ldq(col + 0 * 4); r = ldq(col + 1 * 4); + stq(l, col + 2 * 4); stq(r, col + 3 * 4); + stq(l, col + 4 * 4); stq(r, col + 5 * 4); + stq(l, col + 6 * 4); stq(r, col + 7 * 4); + stq(l, col + 8 * 4); stq(r, col + 9 * 4); + stq(l, col + 10 * 4); stq(r, col + 11 * 4); + stq(l, col + 12 * 4); stq(r, col + 13 * 4); + stq(l, col + 14 * 4); stq(r, col + 15 * 4); } void simple_idct_axp(DCTELEM *block) @@ -275,22 +272,20 @@ void simple_idct_axp(DCTELEM *block) if (rowsZero) { idct_col2(block); } else if (rowsConstant) { - uint64_t *lblock = (uint64_t *) block; - idct_col(block); for (i = 0; i < 8; i += 2) { - uint64_t v = (uint16_t) block[i * 8]; - uint64_t w = (uint16_t) block[i * 8 + 8]; + uint64_t v = (uint16_t) block[0]; + uint64_t w = (uint16_t) block[8]; v |= v << 16; w |= w << 16; v |= v << 32; w |= w << 32; - lblock[0] = v; - lblock[1] = v; - lblock[2] = w; - lblock[3] = w; - lblock += 4; + stq(v, block + 0 * 4); + stq(v, block + 1 * 4); + stq(w, block + 2 * 4); + stq(w, block + 3 * 4); + block += 4 * 4; } } else { for (i = 0; i < 8; i++) -- cgit v1.2.3