Branches: main
Support unboxed float fields in high-level C grades.
When the representation of `float' is no wider than a machine word, d.u.
functor arguments of type `float' (or equivalent) will be stored directly
within cells constructed for that functor, instead of a pointer to the box
containing the value. This was already so for low-level C grades.
compiler/mlds.m:
Add an option to mlds_type, equivalent to
`mlds_array_type(mlds_generic_type)' except that some elements are
known to be floats.
Update some comments.
compiler/ml_global_data.m:
Remember the `--unboxed-float' option in `ml_global_data'.
Special case generic arrays in `ml_gen_static_scalar_const_addr' and
`ml_gen_static_scalar_const_value'. Float literals cannot be used to
initialize an element of a generic array in C. If any appear, replace
the generic array type by an instance of
`mlds_mostly_generic_array_type' with float fields in the positions
which have float initializers.
compiler/ml_code_util.m:
Make `ml_must_box_field_type' and `ml_gen_box_const_rval' depend on the
`--unboxed-float' option.
Delete some now-misleading comments.
Delete an unused predicate.
compiler/mlds_to_c.m:
Update code that writes out scalar static data to handle
`mlds_mostly_generic_array_type'.
In one case, for `--high-level-data' only, output float constants by
their integer representation, so that they may be cast to pointer
types.
compiler/ml_unify_gen.m:
Rename some predicates for clarity.
compiler/ml_accurate_gc.m:
compiler/ml_lookup_switch.m:
compiler/ml_proc_gen.m:
compiler/ml_simplify_switch.m:
compiler/mlds_to_cs.m:
compiler/mlds_to_gcc.m:
compiler/mlds_to_il.m:
compiler/mlds_to_java.m:
Conform to changes.
library/float.m:
Add hidden functions to return the integer representation of the bit
layout of floating point values.
library/exception.m:
Delete mention of MR_AVOID_MACROS.
runtime/mercury.c:
runtime/mercury.h:
Make MR_box_float/MR_unbox_float act like "casts" when MR_BOXED_FLOAT
is undefined, and only define them in high-level grades. I think they
should be replaced by MR_float_to_word/MR_word_to_float (which have
less confusing names when there is no boxing) but that would require
some header file reshuffling which I don't want to undertake yet.
Delete references to MR_AVOID_MACROS. Apparently it existed to support
the defunct gcc back-end but I cannot see it ever being defined.
runtime/mercury_conf_param.h:
MR_HIGHLEVEL_CODE no longer implies MR_BOXED_FLOAT.
Delete mention of MR_AVOID_MACROS.
runtime/mercury_float.h:
Fix a comment.
tests/hard_coded/Mmakefile:
tests/hard_coded/float_ground_term.exp:
tests/hard_coded/float_ground_term.m:
Add a test case.
