re PR middle-end/77925 (Add __builtin_issubnormal)

2017-06-08  Tamar Christina  <tamar.christina@arm.com>

	PR middle-end/77925
	PR middle-end/77926
	PR middle-end/66462

	* gcc/builtins.c (fold_builtin_fpclassify): Remove.
	(fold_builtin_interclass_mathfn): Remove.
	(expand_builtin): Add builtins to lowering list.
	(fold_builtin_n): Remove fold_builtin_varargs.
	(fold_builtin_varargs): Remove.
	* gcc/builtins.def (BUILT_IN_ISZERO, BUILT_IN_ISSUBNORMAL): New.
	* gcc/real.h (get_min_float): New.
	(real_format): Add is_ieee_compatible field.
	* gcc/real.c (get_min_float): New.
	(ieee_single_format): Set is_ieee_compatible flag.
	* gcc/gimple-low.c (lower_stm): Define BUILT_IN_FPCLASSIFY,
	CASE_FLT_FN (BUILT_IN_ISINF), BUILT_IN_ISINFD32, BUILT_IN_ISINFD64,
	BUILT_IN_ISINFD128, BUILT_IN_ISNAND32, BUILT_IN_ISNAND64,
	BUILT_IN_ISNAND128, BUILT_IN_ISNAN, BUILT_IN_ISNORMAL, BUILT_IN_ISZERO,
	BUILT_IN_ISSUBNORMAL, CASE_FLT_FN (BUILT_IN_FINITE), BUILT_IN_FINITED32
	BUILT_IN_FINITED64, BUILT_IN_FINITED128, BUILT_IN_ISFINITE.
	(lower_builtin_fpclassify, is_nan, is_normal, is_infinity): New.
	(is_zero, is_subnormal, is_finite, use_ieee_int_mode): Likewise.
	(lower_builtin_isnan, lower_builtin_isinfinite): Likewise.
	(lower_builtin_isnormal, lower_builtin_iszero): Likewise.
	(lower_builtin_issubnormal, lower_builtin_isfinite): Likewise.
	(emit_tree_cond, get_num_as_int, emit_tree_and_return_var): New.
	(mips_single_format): Likewise.
	(motorola_single_format): Likewise.
	(spu_single_format): Likewise.
	(ieee_double_format): Likewise.
	(mips_double_format): Likewise.
	(motorola_double_format): Likewise.
	(ieee_extended_motorola_format): Likewise.
	(ieee_extended_intel_128_format): Likewise.
	(ieee_extended_intel_96_round_53_format): Likewise.
	(ibm_extended_format): Likewise.
	(mips_extended_format): Likewise.
	(ieee_quad_format): Likewise.
	(mips_quad_format): Likewise.
	(vax_f_format): Likewise.
	(vax_d_format): Likewise.
	(vax_g_format): Likewise.
	(decimal_single_format): Likewise.
	(decimal_quad_format): Likewise.
	(iee_half_format): Likewise.
	(mips_single_format): Likewise.
	(arm_half_format): Likewise.
	(real_internal_format): Likewise.
	* gcc/doc/extend.texi: Add documentation for built-ins.
	* gcc/c/c-typeck.c (convert_arguments): Add BUILT_IN_ISZERO
	and BUILT_IN_ISSUBNORMAL.

gcc/testsuite/
2017-06-08  Tamar Christina  <tamar.christina@arm.com>

	* gcc.target/aarch64/builtin-fpclassify.c: New codegen test.
	* gcc.dg/fold-notunord.c: Removed.
	* gcc.dg/torture/floatn-tg-4.h: Add tests for iszero and issubnormal.
	* gcc.dg/torture/float128-tg-4.c: Likewise.
	* gcc.dg/torture/float128x-tg-4: Likewise.
	* gcc.dg/torture/float16-tg-4.c: Likewise.
	* gcc.dg/torture/float32-tg-4.c: Likewise.
	* gcc.dg/torture/float32x-tg-4.c: Likewise.
	* gcc.dg/torture/float64-tg-4.c: Likewise.
	* gcc.dg/torture/float64x-tg-4.c: Likewise.
	* gcc.dg/pr28796-1.c: Add -O2.
	* gcc.dg/builtins-43.c: Check lower instead of gimple.
	* gcc.dg/tg-tests.h: Add iszero and issubnormal.
	* gcc.dg/pr77925.c: Add to test safe cases.

From-SVN: r249005

1 files changed, 34 insertions, 0 deletions

diff --git a/gcc/real.c b/gcc/real.c
index a5671b2..4b4635f 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -3052,6 +3052,7 @@ const struct real_format ieee_single_format =
     true,
     true,
     false,
+    true,
     "ieee_single"
   };
 
@@ -3075,6 +3076,7 @@ const struct real_format mips_single_format =
     true,
     false,
     true,
+    true,
     "mips_single"
   };
 
@@ -3098,6 +3100,7 @@ const struct real_format motorola_single_format =
     true,
     true,
     true,
+    true,
     "motorola_single"
   };
 
@@ -3132,6 +3135,7 @@ const struct real_format spu_single_format =
     true,
     false,
     false,
+    false,
     "spu_single"
   };
 
@@ -3343,6 +3347,7 @@ const struct real_format ieee_double_format =
     true,
     true,
     false,
+    true,
     "ieee_double"
   };
 
@@ -3366,6 +3371,7 @@ const struct real_format mips_double_format =
     true,
     false,
     true,
+    true,
     "mips_double"
   };
 
@@ -3389,6 +3395,7 @@ const struct real_format motorola_double_format =
     true,
     true,
     true,
+    true,
     "motorola_double"
   };
 
@@ -3735,6 +3742,7 @@ const struct real_format ieee_extended_motorola_format =
     true,
     true,
     true,
+    false,
     "ieee_extended_motorola"
   };
 
@@ -3758,6 +3766,7 @@ const struct real_format ieee_extended_intel_96_format =
     true,
     true,
     false,
+    false,
     "ieee_extended_intel_96"
   };
 
@@ -3781,6 +3790,7 @@ const struct real_format ieee_extended_intel_128_format =
     true,
     true,
     false,
+    false,
     "ieee_extended_intel_128"
   };
 
@@ -3806,6 +3816,7 @@ const struct real_format ieee_extended_intel_96_round_53_format =
     true,
     true,
     false,
+    false,
     "ieee_extended_intel_96_round_53"
   };
 
@@ -3896,6 +3907,7 @@ const struct real_format ibm_extended_format =
     true,
     true,
     false,
+    false,
     "ibm_extended"
   };
 
@@ -3919,6 +3931,7 @@ const struct real_format mips_extended_format =
     true,
     false,
     true,
+    false,
     "mips_extended"
   };
 
@@ -4184,6 +4197,7 @@ const struct real_format ieee_quad_format =
     true,
     true,
     false,
+    true,
     "ieee_quad"
   };
 
@@ -4207,6 +4221,7 @@ const struct real_format mips_quad_format =
     true,
     false,
     true,
+    true,
     "mips_quad"
   };
 
@@ -4509,6 +4524,7 @@ const struct real_format vax_f_format =
     false,
     false,
     false,
+    false,
     "vax_f"
   };
 
@@ -4532,6 +4548,7 @@ const struct real_format vax_d_format =
     false,
     false,
     false,
+    false,
     "vax_d"
   };
 
@@ -4555,6 +4572,7 @@ const struct real_format vax_g_format =
     false,
     false,
     false,
+    false,
     "vax_g"
   };
 
@@ -4633,6 +4651,7 @@ const struct real_format decimal_single_format =
     true,
     true,
     false,
+    false,
     "decimal_single"
   };
 
@@ -4657,6 +4676,7 @@ const struct real_format decimal_double_format =
     true,
     true,
     false,
+    false,
     "decimal_double"
   };
 
@@ -4681,6 +4701,7 @@ const struct real_format decimal_quad_format =
     true,
     true,
     false,
+    false,
     "decimal_quad"
   };
 
@@ -4820,6 +4841,7 @@ const struct real_format ieee_half_format =
     true,
     true,
     false,
+    true,
     "ieee_half"
   };
 
@@ -4846,6 +4868,7 @@ const struct real_format arm_half_format =
     true,
     false,
     false,
+    false,
     "arm_half"
   };
 
@@ -4893,6 +4916,7 @@ const struct real_format real_internal_format =
     true,
     true,
     false,
+    false,
     "real_internal"
   };
 
@@ -5080,6 +5104,16 @@ get_max_float (const struct real_format *fmt, char *buf, size_t len)
   gcc_assert (strlen (buf) < len);
 }
 
+/* Write into BUF the minimum negative representable finite floating-point
+   number, x, such that b**(x-1) is normalized.
+   BUF must be large enough to contain the result.  */
+void
+get_min_float (const struct real_format *fmt, char *buf, size_t len)
+{
+  sprintf (buf, "0x1p%d", fmt->emin - 1);
+  gcc_assert (strlen (buf) < len);
+}
+
 /* True if mode M has a NaN representation and
    the treatment of NaN operands is important.  */