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Viewing changes to src/pulsecore/svolume_mmx.c

  • Committer: Bazaar Package Importer
  • Author(s): Luke Yelavich, Daniel T Chen, Luke Yelavich
  • Date: 2009-09-21 10:28:25 UTC
  • mfrom: (1.14.5 upstream)
  • Revision ID: james.westby@ubuntu.com-20090921102825-dn0svrgwo8w19bc8
Tags: 1:0.9.18-0ubuntu1
https://launchpad.net/bugs/403859
https://launchpad.net/bugs/433209
[ Daniel T Chen ]
* New upstream bugfix release
* debian/patches/:
  - 0052-backport-56b6e18030.patch: Drop
  - 0053-fix-output-element.patch: Drop, applied upstream
  - 0090-use-volume-ignore-for-analog-output.patch: Stop applying
    this patch. Too many people are confused as to why PCM isn't
    being changed when they adjust PA's volume.
  + 0060-backport-c194d.patch: Backport fixes from 0.9.18-stable
    branch (to changeset c194db71b0ff853b4f46df26e135edf63b215451)
  + 0090-disable-flat-volumes.patch: Many people seem uncomfortable
    with PA's new default volume adjustment routine, so disable it
    in favour of the existing behaviour known in previous Ubuntu
    releases. The downside is that the user again has many knobs to
    fiddle; the upside is that applications can no longer drop the
    volume floor. This addresses LP: #403859, #433209.

[ Luke Yelavich ]
* debian/pulse-alsa.conf: Expose the pulse device to the ALSA name hint API.
  Thanks to David Henningsson <launchpad.web@epost.diwic.se> for the patch.
* Add epoch to shlibs version definitions.

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src/pulsecore/svolume_mmx.c
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      " punpcklwd %%mm4, "#s"        \n\t" /* .. |    0  |   p0  | */                   \
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      " pcmpgtw "#v", %%mm4          \n\t" /* .. |    0  | s(vl) | */                   \
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      " pand "#s", %%mm4             \n\t" /* .. |    0  |  (p0) |  (vl >> 15) & p */   \
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      " movq %%mm6, %%mm5            \n\t" /* .. |  ffff |   0   | */                   \
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      " pand "#v", %%mm5             \n\t" /* .. |   vh  |   0   | */                   \
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      " por %%mm5, %%mm4             \n\t" /* .. |   vh  |  (p0) | */                   \
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      " pmulhw "#s", "#v"            \n\t" /* .. |    0  | vl*p0 | */                   \
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      " paddw %%mm4, "#v"            \n\t" /* .. |   vh  | vl*p0 | vh + sign correct */ \
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      " pslld $16, "#s"              \n\t" /* .. |   p0  |    0  | */                   \
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      " por %%mm7, "#s"              \n\t" /* .. |   p0  |    1  | */                   \
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      " pmaddwd "#s", "#v"           \n\t" /* .. |    p0 * v0    | */                   \
 
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      " movq "#s", %%mm5             \n\t"                                              \
 
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      " pmulhw "#v", "#s"            \n\t" /* .. |    0  | vl*p0 | */                   \
 
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      " paddw %%mm4, "#s"            \n\t" /* .. |    0  | vl*p0 | + sign correct */    \
 
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      " psrld $16, "#v"              \n\t" /* .. |    0  |   vh  | */                   \
 
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      " pmaddwd %%mm5, "#v"          \n\t" /* .. |    p0 * vh    | */                   \
 
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      " paddd "#s", "#v"             \n\t" /* .. |    p0 * v0    | */                   \
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      " packssdw "#v", "#v"          \n\t" /* .. | p1*v1 | p0*v0 | */
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/* approximately advances %3 = (%3 + a) % b. This function requires that
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    __asm__ __volatile__ (
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        " xor %3, %3                    \n\t"
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        " sar $1, %2                    \n\t" /* length /= sizeof (int16_t) */
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        " pcmpeqw %%mm6, %%mm6          \n\t" /* .. |  ffff |  ffff | */
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        " pcmpeqw %%mm7, %%mm7          \n\t" /* .. |  ffff |  ffff | */
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        " pslld  $16, %%mm6             \n\t" /* .. |  ffff |     0 | */
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        " psrld  $31, %%mm7             \n\t" /* .. |     0 |     1 | */
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        " test $1, %2                   \n\t" /* check for odd samples */
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        " je 2f                         \n\t"