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Add reduce_add() for int8 and int16 types.

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This maps to specialized instructions (e.g. PSADBW) when available.
This commit is contained in:
Matt Pharr
2013-07-25 09:11:39 -07:00
parent 2d063925a1
commit b6df447b55
24 changed files with 464 additions and 44 deletions
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39
docs/ispc.rst
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@@ -3711,29 +3711,44 @@ instances are added together by the ``reduce_add()`` function.
::
uniform float reduce_add(float x)
uniform int reduce_add(int x)
uniform unsigned int reduce_add(unsigned int x)
uniform int16 reduce_add(int8 x)
uniform unsigned int16 reduce_add(unsigned int8 x)
uniform int32 reduce_add(int16 x)
uniform unsigned int32 reduce_add(unsigned 16int x)
uniform int64 reduce_add(int32 x)
uniform unsigned int64 reduce_add(unsigned int32 x)
uniform int64 reduce_add(int64 x)
uniform unsigned int64 reduce_add(unsigned int64 x)
You can also use functions to compute the minimum and maximum value of the
given value across all of the currently-executing program instances.
uniform float reduce_add(float x)
uniform double reduce_add(double x)
You can also use functions to compute the minimum value of the given value
across all of the currently-executing program instances.
::
uniform float reduce_min(float a)
uniform int32 reduce_min(int32 a)
uniform unsigned int32 reduce_min(unsigned int32 a)
uniform double reduce_min(double a)
uniform int64 reduce_min(int64 a)
uniform unsigned int64 reduce_min(unsigned int64 a)
uniform float reduce_max(float a)
uniform float reduce_min(float a)
uniform double reduce_min(double a)
Equivalent functions are available to comptue the maximum of the given
varying variable over the active program instances.
::
uniform int32 reduce_max(int32 a)
uniform unsigned int32 reduce_max(unsigned int32 a)
uniform double reduce_max(double a)
uniform int64 reduce_max(int64 a)
uniform unsigned int64 reduce_max(unsigned int64 a)
uniform float reduce_max(float a)
uniform double reduce_max(double a)
Finally, you can check to see if a particular value has the same value in
all of the currently-running program instances:
@@ -3741,9 +3756,10 @@ all of the currently-running program instances:
uniform bool reduce_equal(int32 v)
uniform bool reduce_equal(unsigned int32 v)
uniform bool reduce_equal(float v)
uniform bool reduce_equal(int64 v)
uniform bool reduce_equal(unsigned int64 v)
uniform bool reduce_equal(float v)
uniform bool reduce_equal(double)
There are also variants of these functions that return the value as a
@@ -3758,10 +3774,11 @@ performance in the `Performance Guide`_.
uniform bool reduce_equal(int32 v, uniform int32 * uniform sameval)
uniform bool reduce_equal(unsigned int32 v,
uniform unsigned int32 * uniform sameval)
uniform bool reduce_equal(float v, uniform float * uniform sameval)
uniform bool reduce_equal(int64 v, uniform int64 * uniform sameval)
uniform bool reduce_equal(unsigned int64 v,
uniform unsigned int64 * uniform sameval)
uniform bool reduce_equal(float v, uniform float * uniform sameval)
uniform bool reduce_equal(double, uniform double * uniform sameval)
If called when none of the program instances are running,