Module: libav Branch: master Commit: f79364b2c30aaaec9f0b1500a74da5a859c2ff37
Author: Mans Rullgard <[email protected]> Committer: Mans Rullgard <[email protected]> Date: Mon Oct 8 23:01:02 2012 +0100 ppc: fix Altivec build with old compilers The vec_splat() intrinsic requires a constant argument for the element number, and the code relies on the compiler unrolling the loop to provide this. Manually unrolling the loop avoids this reliance and works with all compilers. Signed-off-by: Mans Rullgard <[email protected]> --- libavcodec/ppc/fmtconvert_altivec.c | 19 ++++++++++++++----- 1 files changed, 14 insertions(+), 5 deletions(-) diff --git a/libavcodec/ppc/fmtconvert_altivec.c b/libavcodec/ppc/fmtconvert_altivec.c index 129891a..68e5e00 100644 --- a/libavcodec/ppc/fmtconvert_altivec.c +++ b/libavcodec/ppc/fmtconvert_altivec.c @@ -83,6 +83,12 @@ static void float_to_int16_altivec(int16_t *dst, const float *src, long len) } } +#define VSTE_INC(dst, v, elem, inc) do { \ + vector signed short s = vec_splat(v, elem); \ + vec_ste(s, 0, dst); \ + dst += inc; \ + } while (0) + static void float_to_int16_stride_altivec(int16_t *dst, const float *src, long len, int stride) { @@ -91,11 +97,14 @@ static void float_to_int16_stride_altivec(int16_t *dst, const float *src, for (i = 0; i < len - 7; i += 8) { d = float_to_int16_one_altivec(src + i); - for (j = 0; j < 8; j++) { - s = vec_splat(d, j); - vec_ste(s, 0, dst); - dst += stride; - } + VSTE_INC(dst, d, 0, stride); + VSTE_INC(dst, d, 1, stride); + VSTE_INC(dst, d, 2, stride); + VSTE_INC(dst, d, 3, stride); + VSTE_INC(dst, d, 4, stride); + VSTE_INC(dst, d, 5, stride); + VSTE_INC(dst, d, 6, stride); + VSTE_INC(dst, d, 7, stride); } } _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
