gfortran: Runtime library status
Contents
IO Library
Intrinsic functions and subroutines
Some formatted IO of integers. The current implementation will silently
ignore many IO commands.
The library is not thread-safe. This will have to be fixed because OpenMP
allows threaded IO.
TODO: Figure out what the IO library can really do
Some intrinsics map directly to library functions, and in most
cases the name of the library function used depends on the type of
the arguments. For some intrinsics we generate inline code, and for
others, such as sin, cos and sqrt, we rely on the backend to use
special instructions in the floating point unit of the CPU if
available, or to fall back to a call to libm if not.
Implementation of some non-elemental intrinsic functions (eg. DOT_PRODUCT,
AVERAGE) is not yet optimal. This is hard because we have to make decisions
whether to use inline code (good for small arrays as no function call
overhead occurs) or generate function calls (good for large arrays as it allows
use of hand-optimized assembly routines, SIMD instructions, etc.)
Implementations marked * are performed by the frontend, and
are never seen by the code generation routines. Other calls may also
be eliminated if their value is known at compile time. Intrinsics
marked ** are implemented by means of inline code. There is no
code for these in the library.
| Name | Status | Testsuite |
|---|
| ABS | Implemented | YES |
| ACHAR | Implemented | NO |
| ACOS | Implemented | YES |
| ADJUSTL | Implemented | NO |
| ADJUSTR | Implemented | NO |
| AIMAG | Implemented | YES |
| AINT | Implemented | YES |
| ALL | Implemented | YES |
| ALLOCATED | Implemented** | NO |
| ANINT | Implemented | YES |
| ANY | Implemented | YES |
| ASIN | Implemented | YES |
| ASSOCIATED | Implemented | YES |
| ATAN | Implemented | YES |
| ATAN2 | Implemented | YES |
| BIT_SIZE | Implemented* | NO |
| BTEST | Implemented | YES |
| CEILING | Implemented | YES |
| CHAR | ASCII only | NO |
| CMPLX | Implemented | YES |
| CONJG | Implemented | YES |
| COS | Implemented | YES |
| COSH | Implemented | YES |
| COUNT | Implemented | YES |
| CPU_TIME | Implemented | NO |
| CSHIFT | Not implemented | NO |
| DATE_AND_TIME | Implemented | NO |
| DBLE | Implemented | NO |
| DIGITS | Implemented* | NO |
| DIM | Implemented | YES |
| DOT_PRODUCT | Implemented | YES |
| DPROD | Implemented | YES |
| EOSHIFT | Implemented | YES |
| EPSILON | Implemented* | NO |
| EXP | Implemented | YES |
| EXPONENT | Implemented | YES |
| FLOOR | Implemented | YES |
| FRACTION | Implemented | YES |
| HUGE | Implemented* | NO |
| IACHAR | Implemented | NO |
| IAND | Implemented | YES |
| IBCLR | Implemented | YES |
| IBITS | Implemented | YES |
| IBSET | Implemented | YES |
| ICHAR | ASCII only | NO |
| IEOR | Implemented | YES |
| INDEX | Implemented | NO |
| INT | Implemented | YES |
| IOR | Implemented | YES |
| ISHFT | Implemented | YES |
| ISHFTC | Implemented | YES |
| KIND | Implemented* | NO |
| LBOUND | Implemented | NO |
| LEN | Implemented | NO |
| LEN_TRIM | ASCII only | NO |
| LGE | ASCII only | NO |
| LGT | ASCII only | NO |
| LLE | ASCII only | NO |
| LLT | ASCII only | NO |
| LOG | Implemented | YES |
| LOG10 | Implemented | YES |
| LOGICAL | Implemented | NO |
| MATMUL | Implemented | YES |
| MAX | Implemented | YES |
| MAXEXPONENT | Implemented* | NO |
| MAXVAL | Implemented | YES |
| MAXLOC | Implemented | YES |
| MERGE | Implemented | YES |
| MIN | Implemented | YES |
| MINEXPONENT | Implemented* | NO |
| MINLOC | Implemented | YES |
| MINVAL | Implemented | YES |
| MOD | Implemented | YES |
| MODULO | Implemented | YES |
| MVBITS | Not implemented | NO |
| NEAREST | Implemented | YES |
| NINT | Implemented | YES |
| NOT | Implemented | YES |
| NULL | Implemented | NO |
| PACK | Implemented | YES |
| PRECISION | Implemented* | NO |
| PRESENT | Implemented | YES |
| PRODUCT | Implemented | YES |
| RADIX | Implemented* | NO |
| RANDOM_NUMBER | Not implemented | NO |
| RANDOM_SEED | Not implemented | NO |
| RANGE | Implemented* | NO |
| REAL | Implemented | NO |
| REPEAT | Not implemented | NO |
| RESHAPE | Implemented | NO |
| RRSPACING | Not implemented | NO |
| SCALE | Implemented | YES |
| SCAN | Not implemented | NO |
| SELECTED_INT_KIND | Implemented | YES |
| SELECTED_REAL_KIND | Implemented | YES |
| SET_EXPONENT | Implemented | YES |
| SHAPE | Implemented | YES |
| SIGN | Implemented | YES |
| SIN | Implemented | YES |
| SINH | Implemented | YES |
| SIZE | Implemented | YES |
| SPACING | Implemented | YES |
| SPREAD | Implemented | YES |
| SQRT | Implemented | YES |
| SUM | Implemented | YES |
| SYSTEM_CLOCK | Implemented | NO |
| TAN | Implemented | NO |
| TANH | Implemented | NO |
| TINY | Implemented* | NO |
| TRANSFER | Not implemented | NO |
| TRANSPOSE | Implemented | YES |
| TRIM | Not implemented | NO |
| UBOUND | Implemented | NO |
| UNPACK | Implemented | YES |
| VERIFY | Not implemented | NO |
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Last modified 2006-06-21
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