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| author | Suren A. Chilingaryan <csa@ipecompute4.ands.kit.edu> | 2022-07-26 23:29:12 +0200 |
|---|---|---|
| committer | Suren A. Chilingaryan <csa@ipecompute4.ands.kit.edu> | 2022-07-26 23:29:12 +0200 |
| commit | 9888385e475a747250ab802ee137b76f2b87925d (patch) | |
| tree | 9fd968221e25d71dec56cb285e0d5942b5751c38 /cuda/3d/par3d_fp.cu | |
| parent | 0bad868e66827f94ae93a909dc8ea330a8540a11 (diff) | |
| download | astra-half.tar.gz astra-half.tar.bz2 astra-half.tar.xz astra-half.zip | |
Half-precision back-/forward-projection for parallel geometryhalf
Diffstat (limited to 'cuda/3d/par3d_fp.cu')
| -rw-r--r-- | cuda/3d/par3d_fp.cu | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/cuda/3d/par3d_fp.cu b/cuda/3d/par3d_fp.cu index fda6f93..075784b 100644 --- a/cuda/3d/par3d_fp.cu +++ b/cuda/3d/par3d_fp.cu @@ -146,6 +146,7 @@ bool transferConstants(const SPar3DProjection* angles, unsigned int iProjAngles) // blockIdx: x = u/v detector // y = angle block +#include "rounding.h" template<class COORD, class SCALE> __global__ void par3D_FP_t(float* D_projData, unsigned int projPitch, @@ -212,10 +213,28 @@ __global__ void par3D_FP_t(float* D_projData, unsigned int projPitch, float f0 = startSlice + 0.5f; float f1 = a1 * (startSlice - 0.5f*c.nSlices(dims) + 0.5f) + b1 + 0.5f*c.nDim1(dims) - 0.5f + 0.5f; float f2 = a2 * (startSlice - 0.5f*c.nSlices(dims) + 0.5f) + b2 + 0.5f*c.nDim2(dims) - 0.5f + 0.5f; + //printf("%f, %f (%f), %f (%f)\n", f0, f1, a1, f2, a2); // Only f1 non linear for (int s = startSlice; s < endSlice; ++s) { - fVal += c.tex(tex, f0, f1, f2); + + textype h5 = texto(0.5f); + textype f1_ = texto(f1); + textype f1f_ = texto(floor(f1)); + float f1f = floor(f1); + + if ((f1 - f1f) < 0.5f) { + textype fVal1 = texto(c.tex(tex, f0, f1f - 0.5f, f2)); + textype fVal2 = texto(c.tex(tex, f0, f1f + 0.5f, f2)); + fVal += texfrom(fVal1 + (f1_ + h5 - f1f_) * (fVal2 - fVal1)); +// fVal += texfrom(__hfma(__hadd(h5,__hsub(f1_, f1f_)), __hsub(fVal2, fVal1), fVal1)); + } else { + textype fVal1 = texto(c.tex(tex, f0, f1f + 0.5f, f2)); + textype fVal2 = texto(c.tex(tex, f0, f1f + 1.5f, f2)); + fVal += texfrom(fVal1 + (f1_ - h5 - f1f_) * (fVal2 - fVal1)); + } + +// fVal += c.tex(tex, f0, f1, f2); f0 += 1.0f; f1 += a1; f2 += a2; @@ -308,6 +327,7 @@ __global__ void par3D_FP_SS_t(float* D_projData, unsigned int projPitch, for (int s = startSlice; s < endSlice; ++s) { fVal += c.tex(tex, f0, f1, f2); + f0 += 1.0f; f1 += a1; f2 += a2; |