skcuda.cublas.cublasSrotmg¶
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skcuda.cublas.cublasSrotmg(handle, d1, d2, x1, y1)[source]¶ Construct a single precision real modified Givens rotation matrix.
Constructs the single precision real modified Givens rotation matrix h = [[h11, h12], [h21, h22]] that zeros out the second entry of the vector [[sqrt(d1)*x1], [sqrt(d2)*x2]].
Parameters: - handle (int) – CUBLAS context.
- d1 (numpy.float32) – single precision real value.
- d2 (numpy.float32) – single precision real value.
- x1 (numpy.float32) – single precision real value.
- x2 (numpy.float32) – single precision real value.
Returns: sparam – sparam[0] contains the flag described below; sparam[1:5] contains the values [h00, h10, h01, h11] that determine the rotation matrix h.
Return type: Notes
The rotation matrix may assume the following values:
for flag == -1.0, h == [[h00, h01], [h10, h11]] for flag == 0.0, h == [[1.0, h01], [h10, 1.0]] for flag == 1.0, h == [[h00, 1.0], [-1.0, h11]] for flag == -2.0, h == [[1.0, 0.0], [0.0, 1.0]]
References