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Provide both signed and unsigned int variants of bitcode-based builtins.

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When creating function Symbols for functions that were defined in LLVM bitcode for the standard library, if any of the function parameters are integer types, create two ispc-side Symbols: one where the integer types are all signed and the other where they are all unsigned.  This allows us to provide, for example, both store_to_int16(reference int a[], uniform int offset, int val) as well as store_to_int16(reference unsigned int a[], uniform int offset, unsigned int val). functions.

Added some additional tests to exercise the new variants of these.

Also fixed some cases where the __{load,store}_int{8,16} builtins would read from/write to memory even if the mask was all off (which could cause crashes in some cases.)
This commit is contained in:
Matt Pharr
2011-07-04 12:07:00 +01:00
parent fac50ba454
commit c14c3ceba6
14 changed files with 293 additions and 91 deletions
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tests/packed-store.ispc
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@@ -3,10 +3,10 @@ export uniform int width() { return programCount; }
export void f_f(uniform float RET[], uniform float aFOO[]) {
float a = aFOO[programIndex];
uniform int pack[programCount];
uniform unsigned int pack[programCount];
for (uniform int i = 0; i < programCount; ++i)
pack[i] = 0;
packed_store_active(pack, 0, a);
packed_store_active(pack, 0, (unsigned int)a);
RET[programIndex] = pack[programIndex];
}