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Merge pull request #641 from jbrodman/stdlibshift

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Add a "shift" operator to the stdlib.
This commit is contained in:
Dmitry Babokin
2013-10-28 14:18:31 -07:00
parent ef5d2dc043 e682b19eda
commit 6585a925be
12 changed files with 425 additions and 59 deletions
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14
tests/shift-1.ispc Normal file
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export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
int rot = shift(a, -1);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = programIndex;
if (val < 0) val = 0;
RET[programIndex] = val;
}

15
tests/shift-2.ispc Normal file
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export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
uniform int delta = b - 6; // -1
int rot = shift(a, delta);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = programIndex;
if (val < 0) val = 0;
RET[programIndex] = val;
}

14
tests/shift-3.ispc Normal file
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export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
int rot = shift(a, 1);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = 2 + programIndex;
if (val > programCount) val = 0;
RET[programIndex] = val;
}