[PATCH 19/55] rs6000: Write output to the builtins init file, part 2 of 3

[Bill Schmidt via Gcc-patches]

2021-06-07  Bill Schmidt  <wschm...@linux.ibm.com>

gcc/
        * config/rs6000/rs6000-gen-builtins.c (write_init_bif_table):
        Implement.
---
 gcc/config/rs6000/rs6000-gen-builtins.c | 81 +++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c 
b/gcc/config/rs6000/rs6000-gen-builtins.c
index 2240dfc030f..a261da88097 100644
--- a/gcc/config/rs6000/rs6000-gen-builtins.c
+++ b/gcc/config/rs6000/rs6000-gen-builtins.c
@@ -2238,6 +2238,87 @@ write_header_file (void)
 static void
 write_init_bif_table (void)
 {
+  for (int i = 0; i <= curr_bif; i++)
+    {
+      fprintf (init_file,
+              "  rs6000_builtin_info_x[RS6000_BIF_%s].fntype"
+              "\n    = %s;\n",
+              bifs[i].idname, bifs[i].fndecl);
+
+      /* Check whether we have a "tf" token in this string, representing
+        a float128_type_node.  It's possible that float128_type_node is
+        undefined (occurs for -maltivec -mno-vsx, for example), so we
+        must guard against that.  */
+      int tf_found = strstr (bifs[i].fndecl, "tf") != NULL;
+
+      /* Similarly, look for decimal float tokens.  */
+      int dfp_found = (strstr (bifs[i].fndecl, "dd") != NULL
+                      || strstr (bifs[i].fndecl, "td") != NULL
+                      || strstr (bifs[i].fndecl, "sd") != NULL);
+
+      fprintf (init_file,
+              "  if (new_builtins_are_live)\n");
+      fprintf (init_file, "    {\n");
+
+      if (tf_found)
+       {
+         fprintf (init_file, "      if (float128_type_node)\n");
+         fprintf (init_file, "        {\n");
+       }
+      else if (dfp_found)
+       {
+         fprintf (init_file, "      if (dfloat64_type_node)\n");
+         fprintf (init_file, "        {\n");
+       }
+
+      fprintf (init_file,
+              "      rs6000_builtin_decls_x[(int)RS6000_BIF_%s] = t\n",
+              bifs[i].idname);
+      fprintf (init_file,
+              "        = add_builtin_function (\"%s\",\n",
+              bifs[i].proto.bifname);
+      fprintf (init_file,
+              "                                %s,\n",
+              bifs[i].fndecl);
+      fprintf (init_file,
+              "                                (int)RS6000_BIF_%s,"
+              " BUILT_IN_MD,\n",
+              bifs[i].idname);
+      fprintf (init_file,
+              "                                NULL, NULL_TREE);\n");
+      if (bifs[i].kind == FNK_CONST)
+       {
+         fprintf (init_file, "      TREE_READONLY (t) = 1;\n");
+         fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+       }
+      else if (bifs[i].kind == FNK_PURE)
+       {
+         fprintf (init_file, "      DECL_PURE_P (t) = 1;\n");
+         fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+       }
+      else if (bifs[i].kind == FNK_FPMATH)
+       {
+         fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+         fprintf (init_file, "      if (flag_rounding_math)\n");
+         fprintf (init_file, "        {\n");
+         fprintf (init_file, "          DECL_PURE_P (t) = 1;\n");
+         fprintf (init_file, "          DECL_IS_NOVOPS (t) = 1;\n");
+         fprintf (init_file, "        }\n");
+         fprintf (init_file, "      else\n");
+         fprintf (init_file, "        TREE_READONLY (t) = 1;\n");
+       }
+
+      if (tf_found || dfp_found)
+       {
+         fprintf (init_file, "        }\n");
+         fprintf (init_file, "      else\n");
+         fprintf (init_file, "        {\n");
+         fprintf (init_file, "          rs6000_builtin_decls_x"
+                  "[(int)RS6000_BIF_%s] = NULL_TREE;\n", bifs[i].idname);
+         fprintf (init_file, "        }\n");
+       }
+      fprintf (init_file, "    }\n\n");
+    }
 }
 
 /* Write code to initialize the overload table.  */
-- 
2.27.0