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* [gcc r12-8724] fortran: Expand ieee_arithmetic module's ieee_value inline [PR106579]
@ 2022-08-29 10:06 Jakub Jelinek
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From: Jakub Jelinek @ 2022-08-29 10:06 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:87a07e96dc4e6849ab6ac0b1ceeb5a19aebee9d6
commit r12-8724-g87a07e96dc4e6849ab6ac0b1ceeb5a19aebee9d6
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri Aug 26 09:56:19 2022 +0200
fortran: Expand ieee_arithmetic module's ieee_value inline [PR106579]
The following patch expands IEEE_VALUE function inline in the FE,
but only for the powerpc64le-linux IEEE quad real(kind=16) case.
2022-08-26 Jakub Jelinek <jakub@redhat.com>
PR fortran/106579
* trans-intrinsic.cc: Include realmpfr.h.
(conv_intrinsic_ieee_value): New function.
(gfc_conv_ieee_arithmetic_function): Handle ieee_value.
(cherry picked from commit 0c2d6aa1be2ea85e751852834986ae52d58134d3)
Diff:
---
gcc/fortran/trans-intrinsic.cc | 125 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 125 insertions(+)
diff --git a/gcc/fortran/trans-intrinsic.cc b/gcc/fortran/trans-intrinsic.cc
index 6ed60846ff6..86e0bf9655f 100644
--- a/gcc/fortran/trans-intrinsic.cc
+++ b/gcc/fortran/trans-intrinsic.cc
@@ -41,6 +41,7 @@ along with GCC; see the file COPYING3. If not see
#include "trans-array.h"
#include "dependency.h" /* For CAF array alias analysis. */
#include "attribs.h"
+#include "realmpfr.h"
/* Only for gfc_trans_assign and gfc_trans_pointer_assign. */
@@ -10100,6 +10101,128 @@ conv_intrinsic_ieee_class (gfc_se *se, gfc_expr *expr)
}
+/* Generate code for IEEE_VALUE. */
+
+static bool
+conv_intrinsic_ieee_value (gfc_se *se, gfc_expr *expr)
+{
+ tree args[2], arg, ret, tmp;
+ stmtblock_t body;
+
+ /* In GCC 12, handle inline only the powerpc64le-linux IEEE quad
+ real(kind=16) and nothing else. */
+ if (gfc_type_abi_kind (&expr->ts) != 17)
+ return false;
+
+ /* Convert args, evaluate the second one only once. */
+ conv_ieee_function_args (se, expr, args, 2);
+ arg = gfc_evaluate_now (args[1], &se->pre);
+
+ tree type = TREE_TYPE (arg);
+ /* Perform a quick sanity check that the second argument's type is
+ IEEE_CLASS_TYPE derived type defined in
+ libgfortran/ieee/ieee_arithmetic.F90
+ Primarily check that it is a derived type with a single
+ member in it. */
+ gcc_assert (TREE_CODE (type) == RECORD_TYPE);
+ tree field = NULL_TREE;
+ for (tree f = TYPE_FIELDS (type); f != NULL_TREE; f = DECL_CHAIN (f))
+ if (TREE_CODE (f) == FIELD_DECL)
+ {
+ gcc_assert (field == NULL_TREE);
+ field = f;
+ }
+ gcc_assert (field);
+ arg = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field),
+ arg, field, NULL_TREE);
+ arg = gfc_evaluate_now (arg, &se->pre);
+
+ type = gfc_typenode_for_spec (&expr->ts);
+ gcc_assert (TREE_CODE (type) == REAL_TYPE);
+ ret = gfc_create_var (type, NULL);
+
+ gfc_init_block (&body);
+
+ tree end_label = gfc_build_label_decl (NULL_TREE);
+ for (int c = IEEE_SIGNALING_NAN; c <= IEEE_POSITIVE_INF; ++c)
+ {
+ tree label = gfc_build_label_decl (NULL_TREE);
+ tree low = build_int_cst (TREE_TYPE (arg), c);
+ tmp = build_case_label (low, low, label);
+ gfc_add_expr_to_block (&body, tmp);
+
+ REAL_VALUE_TYPE real;
+ int k;
+ switch (c)
+ {
+ case IEEE_SIGNALING_NAN:
+ real_nan (&real, "", 0, TYPE_MODE (type));
+ break;
+ case IEEE_QUIET_NAN:
+ real_nan (&real, "", 1, TYPE_MODE (type));
+ break;
+ case IEEE_NEGATIVE_INF:
+ real_inf (&real);
+ real = real_value_negate (&real);
+ break;
+ case IEEE_NEGATIVE_NORMAL:
+ real_from_integer (&real, TYPE_MODE (type), -42, SIGNED);
+ break;
+ case IEEE_NEGATIVE_DENORMAL:
+ k = gfc_validate_kind (BT_REAL, expr->ts.kind, false);
+ real_from_mpfr (&real, gfc_real_kinds[k].tiny,
+ type, GFC_RND_MODE);
+ real_arithmetic (&real, RDIV_EXPR, &real, &dconst2);
+ real = real_value_negate (&real);
+ break;
+ case IEEE_NEGATIVE_ZERO:
+ real_from_integer (&real, TYPE_MODE (type), 0, SIGNED);
+ real = real_value_negate (&real);
+ break;
+ case IEEE_POSITIVE_ZERO:
+ /* Make this also the default: label. The other possibility
+ would be to add a separate default: label followed by
+ __builtin_unreachable (). */
+ label = gfc_build_label_decl (NULL_TREE);
+ tmp = build_case_label (NULL_TREE, NULL_TREE, label);
+ gfc_add_expr_to_block (&body, tmp);
+ real_from_integer (&real, TYPE_MODE (type), 0, SIGNED);
+ break;
+ case IEEE_POSITIVE_DENORMAL:
+ k = gfc_validate_kind (BT_REAL, expr->ts.kind, false);
+ real_from_mpfr (&real, gfc_real_kinds[k].tiny,
+ type, GFC_RND_MODE);
+ real_arithmetic (&real, RDIV_EXPR, &real, &dconst2);
+ break;
+ case IEEE_POSITIVE_NORMAL:
+ real_from_integer (&real, TYPE_MODE (type), 42, SIGNED);
+ break;
+ case IEEE_POSITIVE_INF:
+ real_inf (&real);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+
+ tree val = build_real (type, real);
+ gfc_add_modify (&body, ret, val);
+
+ tmp = build1_v (GOTO_EXPR, end_label);
+ gfc_add_expr_to_block (&body, tmp);
+ }
+
+ tmp = gfc_finish_block (&body);
+ tmp = fold_build2_loc (input_location, SWITCH_EXPR, NULL_TREE, arg, tmp);
+ gfc_add_expr_to_block (&se->pre, tmp);
+
+ tmp = build1_v (LABEL_EXPR, end_label);
+ gfc_add_expr_to_block (&se->pre, tmp);
+
+ se->expr = ret;
+ return true;
+}
+
+
/* Generate code for an intrinsic function from the IEEE_ARITHMETIC
module. */
@@ -10132,6 +10255,8 @@ gfc_conv_ieee_arithmetic_function (gfc_se * se, gfc_expr * expr)
conv_intrinsic_ieee_logb_rint (se, expr, BUILT_IN_RINT);
else if (startswith (name, "ieee_class_") && ISDIGIT (name[11]))
return conv_intrinsic_ieee_class (se, expr);
+ else if (startswith (name, "ieee_value_") && ISDIGIT (name[11]))
+ return conv_intrinsic_ieee_value (se, expr);
else
/* It is not among the functions we translate directly. We return
false, so a library function call is emitted. */
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