Hi all !
I can not get at c++-side a struct by value from exported ispc-function
(ispc v1.12 and msvc 2017 are used). Program compiles and runs smoothly
(32bit, debug mode), except i have empty fields where i expect non-zero
values. In 32bit release mode i have slightly different values. In 64bit i
always have zeros at c++-side. I have not found any direct mention or
example of such snippet around. Bundled samples contain only void or
primitive types returning exported functions.. My code:
kernel.ispc:
struct fp32_2 { float v0, v1; };
export uniform fp32_2 loopback( uniform float arg0, uniform float arg1 ){
uniform fp32_2 result;
result.v0 = arg0;
result.v1 = arg1;
print( "ispc side: v0 = %\n", result.v0 );
print( "ispc side: v1 = %\n", result.v1 );
return result;
}
kernel.h (generated by ispc, related parts):
#ifndef __ISPC_STRUCT_fp32_2__
#define __ISPC_STRUCT_fp32_2__
struct fp32_2 {
float v0;
float v1;
};
#endif
...
extern "C"{
extern struct fp32_2 loopback(float arg0, float arg1);
}
main.cpp:
#include "kernel.h"
#include <iostream>
int main(){
auto res = ispc::loopback( 10.0f, 11.0f );
std::cout << "c++ side: v0 = " << res.v0 << "\n";
std::cout << "c++ side: v1 = " << res.v1 << "\n";
}
command line parameters for ispc file compiling (for 32bit debug mode):
ispc %(FullPath) --arch=x86 --target-os=windows --target=sse4-i32x4
-O1 --opt=disable-loop-unroll --emit-obj --outfile=$(IntDir)%(FileName).obj
--header-outfile=%(RootDir)%(Directory)%(Filename).h --werror -g
output (32 bit debug mode or 64bit both modes):
ispc side: v0 = 10.000000
ispc side: v1 = 11.000000
c++ side: v0 = 0
c++ side: v1 = 0
output (32bit release mode):
ispc side: v0 = 10.000000
ispc side: v1 = 11.000000
c++ side: v0 = 0
c++ side: v1 = 5.39308e+33
Each run i got same values. What am i missing or doing wrong ?
Thanks in advance
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