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| author | yash1112 | 2017-07-07 21:20:49 +0530 |
|---|---|---|
| committer | yash1112 | 2017-07-07 21:20:49 +0530 |
| commit | 9e5793a7b05b23e6044a6d7a9ddd5db39ba375f0 (patch) | |
| tree | f50d6e06d8fe6bc1a9053ef10d4b4d857800ab51 /2.3-1/src/fortran/lapack/ieeeck.f | |
| download | Scilab2C-9e5793a7b05b23e6044a6d7a9ddd5db39ba375f0.tar.gz Scilab2C-9e5793a7b05b23e6044a6d7a9ddd5db39ba375f0.tar.bz2 Scilab2C-9e5793a7b05b23e6044a6d7a9ddd5db39ba375f0.zip | |
sci2c arduino updated
Diffstat (limited to '2.3-1/src/fortran/lapack/ieeeck.f')
| -rw-r--r-- | 2.3-1/src/fortran/lapack/ieeeck.f | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/2.3-1/src/fortran/lapack/ieeeck.f b/2.3-1/src/fortran/lapack/ieeeck.f new file mode 100644 index 00000000..ac4aff85 --- /dev/null +++ b/2.3-1/src/fortran/lapack/ieeeck.f @@ -0,0 +1,147 @@ + INTEGER FUNCTION IEEECK( ISPEC, ZERO, ONE ) +* +* -- LAPACK auxiliary routine (version 3.1) -- +* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. +* November 2006 +* +* .. Scalar Arguments .. + INTEGER ISPEC + REAL ONE, ZERO +* .. +* +* Purpose +* ======= +* +* IEEECK is called from the ILAENV to verify that Infinity and +* possibly NaN arithmetic is safe (i.e. will not trap). +* +* Arguments +* ========= +* +* ISPEC (input) INTEGER +* Specifies whether to test just for inifinity arithmetic +* or whether to test for infinity and NaN arithmetic. +* = 0: Verify infinity arithmetic only. +* = 1: Verify infinity and NaN arithmetic. +* +* ZERO (input) REAL +* Must contain the value 0.0 +* This is passed to prevent the compiler from optimizing +* away this code. +* +* ONE (input) REAL +* Must contain the value 1.0 +* This is passed to prevent the compiler from optimizing +* away this code. +* +* RETURN VALUE: INTEGER +* = 0: Arithmetic failed to produce the correct answers +* = 1: Arithmetic produced the correct answers +* +* .. Local Scalars .. + REAL NAN1, NAN2, NAN3, NAN4, NAN5, NAN6, NEGINF, + $ NEGZRO, NEWZRO, POSINF +* .. +* .. Executable Statements .. + IEEECK = 1 +* + POSINF = ONE / ZERO + IF( POSINF.LE.ONE ) THEN + IEEECK = 0 + RETURN + END IF +* + NEGINF = -ONE / ZERO + IF( NEGINF.GE.ZERO ) THEN + IEEECK = 0 + RETURN + END IF +* + NEGZRO = ONE / ( NEGINF+ONE ) + IF( NEGZRO.NE.ZERO ) THEN + IEEECK = 0 + RETURN + END IF +* + NEGINF = ONE / NEGZRO + IF( NEGINF.GE.ZERO ) THEN + IEEECK = 0 + RETURN + END IF +* + NEWZRO = NEGZRO + ZERO + IF( NEWZRO.NE.ZERO ) THEN + IEEECK = 0 + RETURN + END IF +* + POSINF = ONE / NEWZRO + IF( POSINF.LE.ONE ) THEN + IEEECK = 0 + RETURN + END IF +* + NEGINF = NEGINF*POSINF + IF( NEGINF.GE.ZERO ) THEN + IEEECK = 0 + RETURN + END IF +* + POSINF = POSINF*POSINF + IF( POSINF.LE.ONE ) THEN + IEEECK = 0 + RETURN + END IF +* +* +* +* +* Return if we were only asked to check infinity arithmetic +* + IF( ISPEC.EQ.0 ) + $ RETURN +* + NAN1 = POSINF + NEGINF +* + NAN2 = POSINF / NEGINF +* + NAN3 = POSINF / POSINF +* + NAN4 = POSINF*ZERO +* + NAN5 = NEGINF*NEGZRO +* + NAN6 = NAN5*0.0 +* + IF( NAN1.EQ.NAN1 ) THEN + IEEECK = 0 + RETURN + END IF +* + IF( NAN2.EQ.NAN2 ) THEN + IEEECK = 0 + RETURN + END IF +* + IF( NAN3.EQ.NAN3 ) THEN + IEEECK = 0 + RETURN + END IF +* + IF( NAN4.EQ.NAN4 ) THEN + IEEECK = 0 + RETURN + END IF +* + IF( NAN5.EQ.NAN5 ) THEN + IEEECK = 0 + RETURN + END IF +* + IF( NAN6.EQ.NAN6 ) THEN + IEEECK = 0 + RETURN + END IF +* + RETURN + END |