diff options
| author | Wim Taymans <wim.taymans@collabora.co.uk> | 2009-08-14 15:41:32 +0200 |
|---|---|---|
| committer | Wim Taymans <wim.taymans@collabora.co.uk> | 2009-08-20 11:31:03 +0200 |
| commit | f24c24c14b6614cf19ee916886c8b02384bac435 (patch) | |
| tree | 978169fdcb41b8361ed1aab6156b15e52b53cc68 /src/pulsecore/svolume_sse.c | |
| parent | a1235446a733164f00a96688784913172456a34e (diff) | |
volume: improved comments
Diffstat (limited to 'src/pulsecore/svolume_sse.c')
| -rw-r--r-- | src/pulsecore/svolume_sse.c | 45 |
1 files changed, 24 insertions, 21 deletions
diff --git a/src/pulsecore/svolume_sse.c b/src/pulsecore/svolume_sse.c index 8138c6c1..d95fa9d9 100644 --- a/src/pulsecore/svolume_sse.c +++ b/src/pulsecore/svolume_sse.c @@ -231,12 +231,12 @@ pa_volume_s16re_sse (int16_t *samples, int32_t *volumes, unsigned channels, unsi " test $1, %2 \n\t" /* check for odd samples */ " je 2f \n\t" - " movd (%1, %3, 4), %%xmm0 \n\t" /* do odd sample */ - " movw (%0), %4 \n\t" + " movd (%1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */ + " movw (%0), %4 \n\t" /* .. | p0 | */ " rorw $8, %4 \n\t" " movd %4, %%xmm1 \n\t" VOLUME_32x16 (%%xmm1, %%xmm0) - " movd %%xmm0, %4 \n\t" + " movd %%xmm0, %4 \n\t" /* .. | p0*v0 | */ " rorw $8, %4 \n\t" " movw %4, (%0) \n\t" " add $2, %0 \n\t" @@ -244,31 +244,34 @@ pa_volume_s16re_sse (int16_t *samples, int32_t *volumes, unsigned channels, unsi "2: \n\t" " sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */ - " test $1, %2 \n\t" /* check for odd samples */ + " test $1, %2 \n\t" " je 4f \n\t" - "3: \n\t" /* do samples in pairs of 2 */ - " movq (%1, %3, 4), %%xmm0 \n\t" /* v1_h | v1_l | v0_h | v0_l */ - " movd (%0), %%xmm1 \n\t" /* X | X | p1 | p0 */ + "3: \n\t" /* do samples in groups of 2 */ + " movq (%1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */ + " movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */ SWAP_16 (%%xmm1) VOLUME_32x16 (%%xmm1, %%xmm0) SWAP_16 (%%xmm0) - " movd %%xmm0, (%0) \n\t" + " movd %%xmm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */ " add $4, %0 \n\t" MOD_ADD ($2, %5) "4: \n\t" " sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */ - " test $1, %2 \n\t" /* check for odd samples */ + " test $1, %2 \n\t" " je 6f \n\t" - "5: \n\t" /* do samples in pairs of 4 */ - " movdqu (%1, %3, 4), %%xmm0 \n\t" /* v1_h | v1_l | v0_h | v0_l */ - " movq (%0), %%xmm1 \n\t" /* X | X | p1 | p0 */ + /* FIXME, we can do aligned access of the volume values if we can guarantee + * that the array is 16 bytes aligned, we probably have to do the odd values + * after this then. */ + "5: \n\t" /* do samples in groups of 4 */ + " movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */ + " movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */ SWAP_16 (%%xmm1) VOLUME_32x16 (%%xmm1, %%xmm0) SWAP_16 (%%xmm0) - " movq %%xmm0, (%0) \n\t" + " movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */ " add $8, %0 \n\t" MOD_ADD ($4, %5) @@ -277,17 +280,17 @@ pa_volume_s16re_sse (int16_t *samples, int32_t *volumes, unsigned channels, unsi " cmp $0, %2 \n\t" " je 8f \n\t" - "7: \n\t" /* do samples in pairs of 8 */ - " movdqu (%1, %3, 4), %%xmm0 \n\t" /* v1_h | v1_l | v0_h | v0_l */ - " movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* v3_h | v3_l | v2_h | v2_l */ - " movq (%0), %%xmm1 \n\t" /* X | X | p1 | p0 */ - " movq 8(%0), %%xmm3 \n\t" /* X | X | p3 | p2 */ + "7: \n\t" /* do samples in groups of 8 */ + " movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */ + " movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */ + " movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */ + " movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */ SWAP_16_2 (%%xmm1, %%xmm3) VOLUME_32x16 (%%xmm1, %%xmm0) VOLUME_32x16 (%%xmm3, %%xmm2) SWAP_16_2 (%%xmm0, %%xmm2) - " movq %%xmm0, (%0) \n\t" - " movq %%xmm2, 8(%0) \n\t" + " movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */ + " movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */ " add $16, %0 \n\t" MOD_ADD ($8, %5) " dec %2 \n\t" @@ -458,7 +461,7 @@ pa_volume_s24_32re_sse (uint32_t *samples, int32_t *volumes, unsigned channels, } #endif -#define RUN_TEST +#undef RUN_TEST #ifdef RUN_TEST #define CHANNELS 2 |