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exclusive_scan_and is supported, but must be called outside if-statements. in pricniple other must do the same

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Evghenii
2014-01-22 22:12:51 +01:00
parent 08d78e6be5
commit 06313e0ec3
4 changed files with 23 additions and 6 deletions
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8
tests/exclusive-scan-and-1.ispc
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@@ -4,9 +4,17 @@ export uniform int width() { return programCount; }
export void f_f(uniform float RET[], uniform float aFOO[]) {
RET[programIndex] = -1;
int32 a = (programIndex & 1) ? 0xff : 0;
#if 0
if (programIndex & 1) {
RET[programIndex] = exclusive_scan_and(a);
}
#else
const bool mask = programIndex & 1;
const float res = exclusive_scan_and(mask ? a : -1);
if (mask) {
RET[programIndex] = res;
}
#endif
}

10
tests/exclusive-scan-and-2.ispc
View File

@@ -4,9 +4,19 @@ export uniform int width() { return programCount; }
export void f_f(uniform float RET[], uniform float aFOO[]) {
RET[programIndex] = -1;
int32 a = ~(1ul << programIndex);
#if 0
if ((programIndex < 32) && (programIndex & 1) == 0) {
RET[programIndex] = exclusive_scan_and(a);
}
#else
const bool mask = ((programIndex < 32) && (programIndex & 1) == 0);
const float res = exclusive_scan_and(mask ? a : -1);
if (mask)
{
RET[programIndex] = res;
}
#endif
}