diff options
Diffstat (limited to 'gcc/ada/misc.c')
| -rw-r--r-- | gcc/ada/misc.c | 118 |
1 files changed, 112 insertions, 6 deletions
diff --git a/gcc/ada/misc.c b/gcc/ada/misc.c index d2af6f2..42bb3fa 100644 --- a/gcc/ada/misc.c +++ b/gcc/ada/misc.c @@ -39,6 +39,7 @@ #include "coretypes.h" #include "tm.h" #include "tree.h" +#include "real.h" #include "rtl.h" #include "errors.h" #include "diagnostic.h" @@ -146,7 +147,7 @@ static void gnat_adjust_rli (record_layout_info); const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER; -/* Tables describing GCC tree codes used only by GNAT. +/* Tables describing GCC tree codes used only by GNAT. Table indexed by tree code giving a string containing a character classifying the tree code. Possibilities are @@ -272,7 +273,7 @@ gnat_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED) case OPT_gant: warning ("`-gnat' misspelled as `-gant'"); - + /* ... fall through ... */ case OPT_gnat: @@ -283,7 +284,7 @@ gnat_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED) gnat_argc++; if (arg[0] == 'O') - for (i = 1; i < save_argc - 1; i++) + for (i = 1; i < save_argc - 1; i++) if (!strncmp (save_argv[i], "-gnatO", 6)) if (save_argv[++i][0] != '-') { @@ -304,8 +305,8 @@ static unsigned int gnat_init_options (unsigned int argc, const char **argv) { /* Initialize gnat_argv with save_argv size. */ - gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0])); - gnat_argv[0] = xstrdup (argv[0]); /* name of the command */ + gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0])); + gnat_argv[0] = xstrdup (argv[0]); /* name of the command */ gnat_argc = 1; save_argc = argc; @@ -706,7 +707,7 @@ static int gnat_eh_type_covers (tree a, tree b) { /* a catches b if they represent the same exception id or if a - is an "others". + is an "others". ??? integer_zero_node for "others" is hardwired in too many places currently. */ @@ -886,3 +887,108 @@ must_pass_by_ref (tree gnu_type) || (TYPE_SIZE (gnu_type) != 0 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST)); } + +/* This function is called by the front end to enumerate all the supported + modes for the machine. We pass a function which is called back with + the following integer parameters: + + FLOAT_P nonzero if this represents a floating-point mode + COMPLEX_P nonzero is this represents a complex mode + COUNT count of number of items, nonzero for vector mode + PRECISION number of bits in data representation + MANTISSA number of bits in mantissa, if FP and known, else zero. + SIZE number of bits used to store data + ALIGN number of bits to which mode is aligned. */ + +void +enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int)) +{ + enum machine_mode i; + + for (i = 0; i < NUM_MACHINE_MODES; i++) + { + enum machine_mode j; + bool float_p = 0; + bool complex_p = 0; + bool vector_p = 0; + bool skip_p = 0; + int mantissa = 0; + enum machine_mode inner_mode = i; + + switch (GET_MODE_CLASS (i)) + { + case MODE_INT: + break; + case MODE_FLOAT: + float_p = 1; + break; + case MODE_COMPLEX_INT: + complex_p = 1; + inner_mode = GET_MODE_INNER (i); + break; + case MODE_COMPLEX_FLOAT: + float_p = 1; + complex_p = 1; + inner_mode = GET_MODE_INNER (i); + break; + case MODE_VECTOR_INT: + vector_p = 1; + inner_mode = GET_MODE_INNER (i); + break; + case MODE_VECTOR_FLOAT: + float_p = 1; + vector_p = 1; + inner_mode = GET_MODE_INNER (i); + break; + default: + skip_p = 1; + } + + /* Skip this mode if it's one the front end doesn't need to know about + (e.g., the CC modes) or if there is no add insn for that mode (or + any wider mode), meaning it is not supported by the hardware. If + this a complex or vector mode, we care about the inner mode. */ + for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j)) + if (add_optab->handlers[j].insn_code != CODE_FOR_nothing) + break; + + if (float_p) + { + const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode); + + mantissa = fmt->p * fmt->log2_b; + } + + if (!skip_p && j != VOIDmode) + (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0, + GET_MODE_BITSIZE (i), mantissa, + GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i)); + } +} + +int +fp_prec_to_size (int prec) +{ + enum machine_mode mode; + + for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode; + mode = GET_MODE_WIDER_MODE (mode)) + if (GET_MODE_BITSIZE (mode) == prec) + return GET_MODE_SIZE (mode) * BITS_PER_UNIT; + + abort (); +} + +int +fp_size_to_prec (int size) +{ + enum machine_mode mode; + + for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode; + mode = GET_MODE_WIDER_MODE (mode)) + if (GET_MODE_SIZE (mode) * BITS_PER_UNIT == size) + return GET_MODE_BITSIZE (mode); + + abort (); +} + |