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- ALOG10(3I) Last changed: 4-13-99
-
-
- NNAAMMEE
- AALLOOGG1100, DDLLOOGG1100, QQLLOOGG1100 - Computes common logarithm
-
- SSYYNNOOPPSSIISS
- LLOOGG1100 (([XX==]_x))
- AALLOOGG1100 (([XX==]_x))
- DDLLOOGG1100 (([XX==]_x))
- QQLLOOGG1100 (([XX==]_x))
-
- IIMMPPLLEEMMEENNTTAATTIIOONN
- UNICOS, UNICOS/mk, IRIX systems
-
- CF90, MIPSpro 7 Fortran 90, MIPSpro Fortran 77
-
- SSTTAANNDDAARRDDSS
- Fortran
-
- Fortran extension: QQLLOOGG1100
-
- DDEESSCCRRIIPPTTIIOONN
- LLOOGG1100 is the generic function name; the others are specifics. These
- are elemental intrinsic functions. These functions accept the
- following argument:
-
- _x Must be type single precision, double precision, or quad
- precision. See the RETURN VALUES section for information on
- input data types and return values.
-
- These functions evaluate _y = log (_x).
- 10
- Vector versions of these intrinsics exist on some systems. Vector
- versions of AALLOOGG1100 and DDLLOOGG1100 intrinsics exist on UNICOS and UNICOS/mk
- systems. On UNICOS/mk systems, the vector version of these intrinsics
- is used when --OO vveeccttoorr33 or --OO33 are specified on the compiler command
- line. On UNICOS/mk systems, the 64-bit intrinsic vectorizes; the
- 32-bit version does not. A vector version of the single-precision and
- double-precision LLOOGG1100 intrinsic exists on IRIX systems and is used
- when --OO33 is specified on the compiler command line.
-
- NNOOTTEESS
- The AALLOOGG1100 and DDLLOOGG1100 intrinsic function names can be passed as
- arguments; the others cannot.
-
- On CRAY T90 systems that support IEEE arithmetic, the following return
- values occur:
-
- AALLOOGG1100((00)) = -infinity
-
- AALLOOGG1100((--00)) = NaN
-
- AALLOOGG1100((_x)) = NaN, if -infinity <= _x < 0
-
- AALLOOGG1100((infinity)) = infinity
-
- RREETTUURRNN VVAALLUUEESS
- LLOOGG1100 returns the real logarithm of its argument. The generic
- function LLOOGG1100 becomes a call to AALLOOGG1100, DDLLOOGG1100, or QQLLOOGG1100 depending
- on the data type and kind of its argument.
-
- AALLOOGG1100 returns the real common logarithm of its real argument.
-
- DDLLOOGG1100 returns the double-precision common logarithm of its
- double-precision argument.
-
- QQLLOOGG1100 returns the quad-precision common logarithm of its
- quad-precision argument.
-
- The data type and kind type for real, double-precision, and
- quad-precision values differ depending on your platform. For
- platform-specific information, see the TERMINOLOGY section of the
- IINNTTRROO__IINNTTRRIINN(3I) man page.
-
- SSEEEE AALLSSOO
- _I_n_t_r_i_n_s_i_c _P_r_o_c_e_d_u_r_e_s _R_e_f_e_r_e_n_c_e _M_a_n_u_a_l for the printed version of this
- man page.
-