diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 102 |
1 files changed, 90 insertions, 12 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 166abbeea02..ca24982b67d 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -502,7 +502,7 @@ get_pointer_alignment_1 (tree exp, unsigned int *alignp, if (*alignp == 0) *alignp = 1u << (HOST_BITS_PER_INT - 1); /* We cannot really tell whether this result is an approximation. */ - return true; + return false; } else { @@ -9559,6 +9559,8 @@ fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) mode = TYPE_MODE (TREE_TYPE (arg)); + bool is_ibm_extended = MODE_COMPOSITE_P (mode); + /* If there is no optab, try generic code. */ switch (DECL_FUNCTION_CODE (fndecl)) { @@ -9568,10 +9570,18 @@ fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) { /* isinf(x) -> isgreater(fabs(x),DBL_MAX). */ tree const isgr_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); - tree const type = TREE_TYPE (arg); + tree type = TREE_TYPE (arg); REAL_VALUE_TYPE r; char buf[128]; + if (is_ibm_extended) + { + /* NaN and Inf are encoded in the high-order double value + only. The low-order value is not significant. */ + type = double_type_node; + mode = DFmode; + arg = fold_build1_loc (loc, NOP_EXPR, type, arg); + } get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); real_from_string (&r, buf); result = build_call_expr (isgr_fn, 2, @@ -9584,10 +9594,18 @@ fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) { /* isfinite(x) -> islessequal(fabs(x),DBL_MAX). */ tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); - tree const type = TREE_TYPE (arg); + tree type = TREE_TYPE (arg); REAL_VALUE_TYPE r; char buf[128]; + if (is_ibm_extended) + { + /* NaN and Inf are encoded in the high-order double value + only. The low-order value is not significant. */ + type = double_type_node; + mode = DFmode; + arg = fold_build1_loc (loc, NOP_EXPR, type, arg); + } get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); real_from_string (&r, buf); result = build_call_expr (isle_fn, 2, @@ -9607,21 +9625,72 @@ fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg) /* isnormal(x) -> isgreaterequal(fabs(x),DBL_MIN) & islessequal(fabs(x),DBL_MAX). */ tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL); - tree const isge_fn = builtin_decl_explicit (BUILT_IN_ISGREATEREQUAL); - tree const type = TREE_TYPE (arg); + tree type = TREE_TYPE (arg); + tree orig_arg, max_exp, min_exp; + machine_mode orig_mode = mode; REAL_VALUE_TYPE rmax, rmin; char buf[128]; + orig_arg = arg = builtin_save_expr (arg); + if (is_ibm_extended) + { + /* Use double to test the normal range of IBM extended + precision. Emin for IBM extended precision is + different to emin for IEEE double, being 53 higher + since the low double exponent is at least 53 lower + than the high double exponent. */ + type = double_type_node; + mode = DFmode; + arg = fold_build1_loc (loc, NOP_EXPR, type, arg); + } + arg = fold_build1_loc (loc, ABS_EXPR, type, arg); + get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf)); real_from_string (&rmax, buf); - sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1); + sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (orig_mode)->emin - 1); real_from_string (&rmin, buf); - arg = builtin_save_expr (fold_build1_loc (loc, ABS_EXPR, type, arg)); - result = build_call_expr (isle_fn, 2, arg, - build_real (type, rmax)); - result = fold_build2 (BIT_AND_EXPR, integer_type_node, result, - build_call_expr (isge_fn, 2, arg, - build_real (type, rmin))); + max_exp = build_real (type, rmax); + min_exp = build_real (type, rmin); + + max_exp = build_call_expr (isle_fn, 2, arg, max_exp); + if (is_ibm_extended) + { + /* Testing the high end of the range is done just using + the high double, using the same test as isfinite(). + For the subnormal end of the range we first test the + high double, then if its magnitude is equal to the + limit of 0x1p-969, we test whether the low double is + non-zero and opposite sign to the high double. */ + tree const islt_fn = builtin_decl_explicit (BUILT_IN_ISLESS); + tree const isgt_fn = builtin_decl_explicit (BUILT_IN_ISGREATER); + tree gt_min = build_call_expr (isgt_fn, 2, arg, min_exp); + tree eq_min = fold_build2 (EQ_EXPR, integer_type_node, + arg, min_exp); + tree as_complex = build1 (VIEW_CONVERT_EXPR, + complex_double_type_node, orig_arg); + tree hi_dbl = build1 (REALPART_EXPR, type, as_complex); + tree lo_dbl = build1 (IMAGPART_EXPR, type, as_complex); + tree zero = build_real (type, dconst0); + tree hilt = build_call_expr (islt_fn, 2, hi_dbl, zero); + tree lolt = build_call_expr (islt_fn, 2, lo_dbl, zero); + tree logt = build_call_expr (isgt_fn, 2, lo_dbl, zero); + tree ok_lo = fold_build1 (TRUTH_NOT_EXPR, integer_type_node, + fold_build3 (COND_EXPR, + integer_type_node, + hilt, logt, lolt)); + eq_min = fold_build2 (TRUTH_ANDIF_EXPR, integer_type_node, + eq_min, ok_lo); + min_exp = fold_build2 (TRUTH_ORIF_EXPR, integer_type_node, + gt_min, eq_min); + } + else + { + tree const isge_fn + = builtin_decl_explicit (BUILT_IN_ISGREATEREQUAL); + min_exp = build_call_expr (isge_fn, 2, arg, min_exp); + } + result = fold_build2 (BIT_AND_EXPR, integer_type_node, + max_exp, min_exp); return result; } default: @@ -9716,6 +9785,15 @@ fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index) return real_isnan (&r) ? integer_one_node : integer_zero_node; } + { + bool is_ibm_extended = MODE_COMPOSITE_P (TYPE_MODE (TREE_TYPE (arg))); + if (is_ibm_extended) + { + /* NaN and Inf are encoded in the high-order double value + only. The low-order value is not significant. */ + arg = fold_build1_loc (loc, NOP_EXPR, double_type_node, arg); + } + } arg = builtin_save_expr (arg); return fold_build2_loc (loc, UNORDERED_EXPR, type, arg, arg); |