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- CCCCLLLLAAAARRRRTTTTGGGG((((3333SSSS)))) CCCCLLLLAAAARRRRTTTTGGGG((((3333SSSS))))
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- CLARTG - generate a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ]
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- SUBROUTINE CLARTG( F, G, CS, SN, R )
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- REAL CS
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- COMPLEX F, G, R, SN
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- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
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- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CLARTG generates a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ] .
- [ ] = [ ] where CS**2 + |SN|**2 = 1. [ -SN CS ] [ G ] [ 0 ]
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- This is a faster version of the BLAS1 routine CROTG, except for the
- following differences:
- F and G are unchanged on return.
- If G=0, then CS=1 and SN=0.
- If F=0, then CS=0 and SN is chosen so that R is real.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- F (input) COMPLEX
- The first component of vector to be rotated.
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- G (input) COMPLEX
- The second component of vector to be rotated.
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- CS (output) REAL
- The cosine of the rotation.
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- SN (output) COMPLEX
- The sine of the rotation.
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- R (output) COMPLEX
- The nonzero component of the rotated vector.
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- PPPPaaaaggggeeee 1111
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- CCCCLLLLAAAARRRRTTTTGGGG((((3333SSSS)))) CCCCLLLLAAAARRRRTTTTGGGG((((3333SSSS))))
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- FFFFUUUURRRRTTTTHHHHEEEERRRR DDDDEEEETTTTAAAAIIIILLLLSSSS
- 3-5-96 - Modified with a new algorithm by W. Kahan and J. Demmel
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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- PPPPaaaaggggeeee 2222
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