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Diffstat (limited to 'testsuites/ada/sptests/sp19/README')
| -rw-r--r-- | testsuites/ada/sptests/sp19/README | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/testsuites/ada/sptests/sp19/README b/testsuites/ada/sptests/sp19/README new file mode 100644 index 0000000000..4fd698381e --- /dev/null +++ b/testsuites/ada/sptests/sp19/README @@ -0,0 +1,19 @@ +This is a "problem" test in Ada versus the C equivalent. In C, +we used macros to : + + + declare a LOT of local integer and floating point variables + + load them with values + + check them at certain times + + to avoid floating point operations on CPUs w/o hardware support + +The macros are not equivalent to subprograms doing the same thing. +We are trying to insure that the register set is fully utilized and +checking that it survives context switches. If the routines are +subprograms, then calling conventions and scoping rules apply. Thus +the variables do not exist throughout the entire life of the task +as in the C test. + +It seems to point out that although the conditional compilation +and macro capabilities of C are often abused, they do provide +capabilities which are difficult if not impossible to mimic entirely +with subprograms. |