This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH][GCC][PATCHv3] Improve fpclassify w.r.t IEEE like numbers in GIMPLE.
- From: Tamar Christina <Tamar dot Christina at arm dot com>
- To: Joseph Myers <joseph at codesourcery dot com>, Jeff Law <law at redhat dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Wilco Dijkstra <Wilco dot Dijkstra at arm dot com>, "rguenther at suse dot de" <rguenther at suse dot de>, "Michael Meissner" <meissner at linux dot vnet dot ibm dot com>, nd <nd at arm dot com>
- Date: Thu, 19 Jan 2017 14:24:41 +0000
- Subject: Re: [PATCH][GCC][PATCHv3] Improve fpclassify w.r.t IEEE like numbers in GIMPLE.
- Authentication-results: sourceware.org; auth=none
- Authentication-results: spf=none (sender IP is ) smtp.mailfrom=Tamar dot Christina at arm dot com;
- Nodisclaimer: True
- References: <HE1PR0801MB2027D1CA7B116B16DD1E5641FFBB0@HE1PR0801MB2027.eurprd08.prod.outlook.com> <alpine.DEB.2.20.1611112157270.32183@digraph.polyomino.org.uk> <VI1PR0801MB2031689EAA3643B992C12E0AFFB60@VI1PR0801MB2031.eurprd08.prod.outlook.com> <alpine.DEB.2.20.1611241821520.21096@digraph.polyomino.org.uk> <VI1PR0801MB203191C5CA00160F3DAC7E40FF890@VI1PR0801MB2031.eurprd08.prod.outlook.com> <bad2845d-1944-d792-d4d1-91eac63eb73c@redhat.com> <VI1PR0801MB20311CC45C387326291E49F1FF9D0@VI1PR0801MB2031.eurprd08.prod.outlook.com> <alpine.DEB.2.20.1612151858040.2106@digraph.polyomino.org.uk> <VI1PR0801MB20313CD2538258D3AAA60F5DFF910@VI1PR0801MB2031.eurprd08.prod.outlook.com> <72535306-7d9c-bc2d-b7a3-06360633cfef@redhat.com> <alpine.DEB.2.20.1701181641540.1980@digraph.polyomino.org.uk>,<alpine.DEB.2.20.1701181703580.1980@digraph.polyomino.org.uk>
- Spamdiagnosticmetadata: NSPM
- Spamdiagnosticoutput: 1:99
Hi Joseph & Jeff,
Thanks for the feedback!
> > Generally, I don't see tests added that these new functions are correct
> > for float, double and long double, which would detect such issues if run
> > for a target with IBM long double.
>
> Specifically, I think gcc.dg/tg-tests.h should have tests added for
> __builtin_issubnormal and __builtin_iszero (i.e. have the existing test
> inputs also tested with the new functions).
Right, sorry I missed these, I had tests for them in the aarch64 specific backend
but not in the general area.
> Also, I don't think the call to perform_ibm_extended_fixups in
> is_subnormal is correct. Subnormal for IBM long double is *not* the same
> as subnormal double high part. Likewise it's incorrect in is_normal as
> well.
The calls to is_zero and is_subnormal were incorrect indeed. I've corrected them
by not calling the fixup code and to instead make sure it falls through into the
old fp based code which did normal floating point operations on the number. This
is the same code as was before in fpclassify so it should work.
As for is_normal, the code is almost identical as the code that used to be in
fold_builtin_interclass_mathfn in BUILT_IN_ISNORMAL, with the exception that I
don't check <= max_value but instead < inifity, so I can reuse the same constant.
The code was mostly just copy pasted from that procedure (with now a bug fix in
that it uses the abs value and not the original one).
> Since the patch adds new built-in functions __builtin_issubnormal and
> __builtin_iszero, it also needs to update c-typeck.c:convert_arguments to
> make those functions remove excess precision. This is mentioned in the
> PRs 77925 and 77926 for addition of those functions (which as I noted in
> <https://gcc.gnu.org/ml/gcc-patches/2016-11/msg01190.html> should be
> included in the ChangeLog entry for the patch).
Hmm, I had missed this detail when I looked at the tickets. I've added it now.
> > +#include "stor-layout.h"
> > +#include "target.h"
> Presumably these are for the endianness & mode checking? It's a bit of
> a wart checking those in gimple-low, but I can live with it. We might
> consider ways to avoid this layering violation in the future.
Yes, one way to possibly avoid it is to just pass them along as arguments to the
top level function. I can make a ticket to resolve this when stage1 opens again
if you'd like.
Are you ok with the changes Joseph?
The changelog has also been updated:
gcc/
2017-01-19 Tamar Christina <tamar.christina@arm.com>
PR middle-end/77925
PR middle-end/77926
PR middle-end/66462
* gcc/builtins.c (fold_builtin_fpclassify): Removed.
(fold_builtin_interclass_mathfn): Removed.
(expand_builtin): Added builtins to lowering list.
(fold_builtin_n): Removed fold_builtin_varargs.
(fold_builtin_varargs): Removed.
* gcc/builtins.def (BUILT_IN_ISZERO, BUILT_IN_ISSUBNORMAL): Added.
* gcc/real.h (get_min_float): Added.
(real_format): Added is_ieee_compatible field.
* gcc/real.c (get_min_float): Added.
(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): Added.
(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): Added.
(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: Added documentation for built-ins.
* gcc/c/c-typeck.c (convert_arguments): Added BUILT_IN_ISZERO
and BUILT_IN_ISSUBNORMAL.
gcc/testsuite/
2017-01-19 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: Added 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: Added -O2.
* gcc.dg/builtins-43.c: Check lower instead of gimple.
* gcc/testsuite/gcc.dg/tg-tests.h: Added iszero and issubnormal.
Tamar.
________________________________________
From: Joseph Myers <joseph@codesourcery.com>
Sent: Wednesday, January 18, 2017 5:05:07 PM
To: Jeff Law
Cc: Tamar Christina; GCC Patches; Wilco Dijkstra; rguenther@suse.de; Michael Meissner; nd
Subject: Re: [PATCH][GCC][PATCHv3] Improve fpclassify w.r.t IEEE like numbers in GIMPLE.
On Wed, 18 Jan 2017, Joseph Myers wrote:
> Generally, I don't see tests added that these new functions are correct
> for float, double and long double, which would detect such issues if run
> for a target with IBM long double.
Specifically, I think gcc.dg/tg-tests.h should have tests added for
__builtin_issubnormal and __builtin_iszero (i.e. have the existing test
inputs also tested with the new functions).
--
Joseph S. Myers
joseph@codesourcery.com
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 3ac2d44148440b124559ba7cd3de483b7a74b72d..d8ff9c70ae6b9e72e09b8cbd9a0bd41b6830b83e 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -160,7 +160,6 @@ static tree fold_builtin_0 (location_t, tree);
static tree fold_builtin_1 (location_t, tree, tree);
static tree fold_builtin_2 (location_t, tree, tree, tree);
static tree fold_builtin_3 (location_t, tree, tree, tree, tree);
-static tree fold_builtin_varargs (location_t, tree, tree*, int);
static tree fold_builtin_strpbrk (location_t, tree, tree, tree);
static tree fold_builtin_strstr (location_t, tree, tree, tree);
@@ -2202,19 +2201,8 @@ interclass_mathfn_icode (tree arg, tree fndecl)
switch (DECL_FUNCTION_CODE (fndecl))
{
CASE_FLT_FN (BUILT_IN_ILOGB):
- errno_set = true; builtin_optab = ilogb_optab; break;
- CASE_FLT_FN (BUILT_IN_ISINF):
- builtin_optab = isinf_optab; break;
- case BUILT_IN_ISNORMAL:
- case BUILT_IN_ISFINITE:
- CASE_FLT_FN (BUILT_IN_FINITE):
- case BUILT_IN_FINITED32:
- case BUILT_IN_FINITED64:
- case BUILT_IN_FINITED128:
- case BUILT_IN_ISINFD32:
- case BUILT_IN_ISINFD64:
- case BUILT_IN_ISINFD128:
- /* These builtins have no optabs (yet). */
+ errno_set = true;
+ builtin_optab = ilogb_optab;
break;
default:
gcc_unreachable ();
@@ -2233,8 +2221,7 @@ interclass_mathfn_icode (tree arg, tree fndecl)
}
/* Expand a call to one of the builtin math functions that operate on
- floating point argument and output an integer result (ilogb, isinf,
- isnan, etc).
+ floating point argument and output an integer result (ilogb, etc).
Return 0 if a normal call should be emitted rather than expanding the
function in-line. EXP is the expression that is a call to the builtin
function; if convenient, the result should be placed in TARGET. */
@@ -5997,11 +5984,7 @@ expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode,
CASE_FLT_FN (BUILT_IN_ILOGB):
if (! flag_unsafe_math_optimizations)
break;
- gcc_fallthrough ();
- CASE_FLT_FN (BUILT_IN_ISINF):
- CASE_FLT_FN (BUILT_IN_FINITE):
- case BUILT_IN_ISFINITE:
- case BUILT_IN_ISNORMAL:
+
target = expand_builtin_interclass_mathfn (exp, target);
if (target)
return target;
@@ -6281,8 +6264,25 @@ expand_builtin (tree exp, rtx target, rtx subtarget, machine_mode mode,
}
break;
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ case BUILT_IN_ISNAND32:
+ case BUILT_IN_ISNAND64:
+ case BUILT_IN_ISNAND128:
+ case BUILT_IN_ISNAN:
+ case BUILT_IN_ISINFD32:
+ case BUILT_IN_ISINFD64:
+ case BUILT_IN_ISINFD128:
+ case BUILT_IN_ISNORMAL:
+ case BUILT_IN_ISZERO:
+ case BUILT_IN_ISSUBNORMAL:
+ case BUILT_IN_FPCLASSIFY:
case BUILT_IN_SETJMP:
- /* This should have been lowered to the builtins below. */
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ case BUILT_IN_FINITED32:
+ case BUILT_IN_FINITED64:
+ case BUILT_IN_FINITED128:
+ case BUILT_IN_ISFINITE:
+ /* These should have been lowered to the builtins in gimple-low.c. */
gcc_unreachable ();
case BUILT_IN_SETJMP_SETUP:
@@ -7622,184 +7622,19 @@ fold_builtin_modf (location_t loc, tree arg0, tree arg1, tree rettype)
return NULL_TREE;
}
-/* Given a location LOC, an interclass builtin function decl FNDECL
- and its single argument ARG, return an folded expression computing
- the same, or NULL_TREE if we either couldn't or didn't want to fold
- (the latter happen if there's an RTL instruction available). */
-
-static tree
-fold_builtin_interclass_mathfn (location_t loc, tree fndecl, tree arg)
-{
- machine_mode mode;
-
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- if (interclass_mathfn_icode (arg, fndecl) != CODE_FOR_nothing)
- return NULL_TREE;
-
- 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))
- {
- tree result;
- CASE_FLT_FN (BUILT_IN_ISINF):
- {
- /* isinf(x) -> isgreater(fabs(x),DBL_MAX). */
- tree const isgr_fn = builtin_decl_explicit (BUILT_IN_ISGREATER);
- 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,
- fold_build1_loc (loc, ABS_EXPR, type, arg),
- build_real (type, r));
- return result;
- }
- CASE_FLT_FN (BUILT_IN_FINITE):
- case BUILT_IN_ISFINITE:
- {
- /* isfinite(x) -> islessequal(fabs(x),DBL_MAX). */
- tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL);
- 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,
- fold_build1_loc (loc, ABS_EXPR, type, arg),
- build_real (type, r));
- /*result = fold_build2_loc (loc, UNGT_EXPR,
- TREE_TYPE (TREE_TYPE (fndecl)),
- fold_build1_loc (loc, ABS_EXPR, type, arg),
- build_real (type, r));
- result = fold_build1_loc (loc, TRUTH_NOT_EXPR,
- TREE_TYPE (TREE_TYPE (fndecl)),
- result);*/
- return result;
- }
- case BUILT_IN_ISNORMAL:
- {
- /* isnormal(x) -> isgreaterequal(fabs(x),DBL_MIN) &
- islessequal(fabs(x),DBL_MAX). */
- tree const isle_fn = builtin_decl_explicit (BUILT_IN_ISLESSEQUAL);
- 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 (orig_mode)->emin - 1);
- real_from_string (&rmin, buf);
- 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:
- break;
- }
-
- return NULL_TREE;
-}
-
-/* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite.
+/* Fold a call to __builtin_isinf_sign.
ARG is the argument for the call. */
static tree
-fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index)
+fold_builtin_classify (location_t loc, tree arg, int builtin_index)
{
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
-
if (!validate_arg (arg, REAL_TYPE))
return NULL_TREE;
switch (builtin_index)
{
- case BUILT_IN_ISINF:
- if (!HONOR_INFINITIES (arg))
- return omit_one_operand_loc (loc, type, integer_zero_node, arg);
-
- return NULL_TREE;
-
case BUILT_IN_ISINF_SIGN:
{
/* isinf_sign(x) -> isinf(x) ? (signbit(x) ? -1 : 1) : 0 */
@@ -7832,106 +7667,11 @@ fold_builtin_classify (location_t loc, tree fndecl, tree arg, int builtin_index)
return tmp;
}
- case BUILT_IN_ISFINITE:
- if (!HONOR_NANS (arg)
- && !HONOR_INFINITIES (arg))
- return omit_one_operand_loc (loc, type, integer_one_node, arg);
-
- return NULL_TREE;
-
- case BUILT_IN_ISNAN:
- if (!HONOR_NANS (arg))
- return omit_one_operand_loc (loc, type, integer_zero_node, arg);
-
- {
- 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);
-
default:
gcc_unreachable ();
}
}
-/* Fold a call to __builtin_fpclassify(int, int, int, int, int, ...).
- This builtin will generate code to return the appropriate floating
- point classification depending on the value of the floating point
- number passed in. The possible return values must be supplied as
- int arguments to the call in the following order: FP_NAN, FP_INFINITE,
- FP_NORMAL, FP_SUBNORMAL and FP_ZERO. The ellipses is for exactly
- one floating point argument which is "type generic". */
-
-static tree
-fold_builtin_fpclassify (location_t loc, tree *args, int nargs)
-{
- tree fp_nan, fp_infinite, fp_normal, fp_subnormal, fp_zero,
- arg, type, res, tmp;
- machine_mode mode;
- REAL_VALUE_TYPE r;
- char buf[128];
-
- /* Verify the required arguments in the original call. */
- if (nargs != 6
- || !validate_arg (args[0], INTEGER_TYPE)
- || !validate_arg (args[1], INTEGER_TYPE)
- || !validate_arg (args[2], INTEGER_TYPE)
- || !validate_arg (args[3], INTEGER_TYPE)
- || !validate_arg (args[4], INTEGER_TYPE)
- || !validate_arg (args[5], REAL_TYPE))
- return NULL_TREE;
-
- fp_nan = args[0];
- fp_infinite = args[1];
- fp_normal = args[2];
- fp_subnormal = args[3];
- fp_zero = args[4];
- arg = args[5];
- type = TREE_TYPE (arg);
- mode = TYPE_MODE (type);
- arg = builtin_save_expr (fold_build1_loc (loc, ABS_EXPR, type, arg));
-
- /* fpclassify(x) ->
- isnan(x) ? FP_NAN :
- (fabs(x) == Inf ? FP_INFINITE :
- (fabs(x) >= DBL_MIN ? FP_NORMAL :
- (x == 0 ? FP_ZERO : FP_SUBNORMAL))). */
-
- tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg,
- build_real (type, dconst0));
- res = fold_build3_loc (loc, COND_EXPR, integer_type_node,
- tmp, fp_zero, fp_subnormal);
-
- sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1);
- real_from_string (&r, buf);
- tmp = fold_build2_loc (loc, GE_EXPR, integer_type_node,
- arg, build_real (type, r));
- res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, fp_normal, res);
-
- if (HONOR_INFINITIES (mode))
- {
- real_inf (&r);
- tmp = fold_build2_loc (loc, EQ_EXPR, integer_type_node, arg,
- build_real (type, r));
- res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp,
- fp_infinite, res);
- }
-
- if (HONOR_NANS (mode))
- {
- tmp = fold_build2_loc (loc, ORDERED_EXPR, integer_type_node, arg, arg);
- res = fold_build3_loc (loc, COND_EXPR, integer_type_node, tmp, res, fp_nan);
- }
-
- return res;
-}
-
/* Fold a call to an unordered comparison function such as
__builtin_isgreater(). FNDECL is the FUNCTION_DECL for the function
being called and ARG0 and ARG1 are the arguments for the call.
@@ -8232,40 +7972,8 @@ fold_builtin_1 (location_t loc, tree fndecl, tree arg0)
case BUILT_IN_ISDIGIT:
return fold_builtin_isdigit (loc, arg0);
- CASE_FLT_FN (BUILT_IN_FINITE):
- case BUILT_IN_FINITED32:
- case BUILT_IN_FINITED64:
- case BUILT_IN_FINITED128:
- case BUILT_IN_ISFINITE:
- {
- tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISFINITE);
- if (ret)
- return ret;
- return fold_builtin_interclass_mathfn (loc, fndecl, arg0);
- }
-
- CASE_FLT_FN (BUILT_IN_ISINF):
- case BUILT_IN_ISINFD32:
- case BUILT_IN_ISINFD64:
- case BUILT_IN_ISINFD128:
- {
- tree ret = fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF);
- if (ret)
- return ret;
- return fold_builtin_interclass_mathfn (loc, fndecl, arg0);
- }
-
- case BUILT_IN_ISNORMAL:
- return fold_builtin_interclass_mathfn (loc, fndecl, arg0);
-
case BUILT_IN_ISINF_SIGN:
- return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISINF_SIGN);
-
- CASE_FLT_FN (BUILT_IN_ISNAN):
- case BUILT_IN_ISNAND32:
- case BUILT_IN_ISNAND64:
- case BUILT_IN_ISNAND128:
- return fold_builtin_classify (loc, fndecl, arg0, BUILT_IN_ISNAN);
+ return fold_builtin_classify (loc, arg0, BUILT_IN_ISINF_SIGN);
case BUILT_IN_FREE:
if (integer_zerop (arg0))
@@ -8465,7 +8173,6 @@ fold_builtin_n (location_t loc, tree fndecl, tree *args, int nargs, bool)
ret = fold_builtin_3 (loc, fndecl, args[0], args[1], args[2]);
break;
default:
- ret = fold_builtin_varargs (loc, fndecl, args, nargs);
break;
}
if (ret)
@@ -9422,37 +9129,6 @@ fold_builtin_object_size (tree ptr, tree ost)
return NULL_TREE;
}
-/* Builtins with folding operations that operate on "..." arguments
- need special handling; we need to store the arguments in a convenient
- data structure before attempting any folding. Fortunately there are
- only a few builtins that fall into this category. FNDECL is the
- function, EXP is the CALL_EXPR for the call. */
-
-static tree
-fold_builtin_varargs (location_t loc, tree fndecl, tree *args, int nargs)
-{
- enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
- tree ret = NULL_TREE;
-
- switch (fcode)
- {
- case BUILT_IN_FPCLASSIFY:
- ret = fold_builtin_fpclassify (loc, args, nargs);
- break;
-
- default:
- break;
- }
- if (ret)
- {
- ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
- SET_EXPR_LOCATION (ret, loc);
- TREE_NO_WARNING (ret) = 1;
- return ret;
- }
- return NULL_TREE;
-}
-
/* Initialize format string characters in the target charset. */
bool
diff --git a/gcc/builtins.def b/gcc/builtins.def
index 219feebd3aebefbd079bf37cc801453cd1965e00..91aa6f37fa098777bc794bad56d8c561ab9fdc44 100644
--- a/gcc/builtins.def
+++ b/gcc/builtins.def
@@ -831,6 +831,8 @@ DEF_EXT_LIB_BUILTIN (BUILT_IN_ISINFL, "isinfl", BT_FN_INT_LONGDOUBLE, ATTR_CO
DEF_EXT_LIB_BUILTIN (BUILT_IN_ISINFD32, "isinfd32", BT_FN_INT_DFLOAT32, ATTR_CONST_NOTHROW_LEAF_LIST)
DEF_EXT_LIB_BUILTIN (BUILT_IN_ISINFD64, "isinfd64", BT_FN_INT_DFLOAT64, ATTR_CONST_NOTHROW_LEAF_LIST)
DEF_EXT_LIB_BUILTIN (BUILT_IN_ISINFD128, "isinfd128", BT_FN_INT_DFLOAT128, ATTR_CONST_NOTHROW_LEAF_LIST)
+DEF_GCC_BUILTIN (BUILT_IN_ISZERO, "iszero", BT_FN_INT_VAR, ATTR_CONST_NOTHROW_TYPEGENERIC_LEAF)
+DEF_GCC_BUILTIN (BUILT_IN_ISSUBNORMAL, "issubnormal", BT_FN_INT_VAR, ATTR_CONST_NOTHROW_TYPEGENERIC_LEAF)
DEF_C99_C90RES_BUILTIN (BUILT_IN_ISNAN, "isnan", BT_FN_INT_VAR, ATTR_CONST_NOTHROW_TYPEGENERIC_LEAF)
DEF_EXT_LIB_BUILTIN (BUILT_IN_ISNANF, "isnanf", BT_FN_INT_FLOAT, ATTR_CONST_NOTHROW_LEAF_LIST)
DEF_EXT_LIB_BUILTIN (BUILT_IN_ISNANL, "isnanl", BT_FN_INT_LONGDOUBLE, ATTR_CONST_NOTHROW_LEAF_LIST)
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index f0917ed788c91b2a2c8701438150f0e634c9402b..e2b4acd21b7d70e6500e42064db49e0f4a84aae9 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -3232,6 +3232,8 @@ convert_arguments (location_t loc, vec<location_t> arg_loc, tree typelist,
case BUILT_IN_ISINF_SIGN:
case BUILT_IN_ISNAN:
case BUILT_IN_ISNORMAL:
+ case BUILT_IN_ISZERO:
+ case BUILT_IN_ISSUBNORMAL:
case BUILT_IN_FPCLASSIFY:
type_generic_remove_excess_precision = true;
break;
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 0669f7999beb078822e471352036d8f13517812d..c240bbe9a8fd595a0e7e2b41fb708efae1e5279a 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -10433,6 +10433,10 @@ in the Cilk Plus language manual which can be found at
@findex __builtin_isgreater
@findex __builtin_isgreaterequal
@findex __builtin_isinf_sign
+@findex __builtin_isinf
+@findex __builtin_isnan
+@findex __builtin_iszero
+@findex __builtin_issubnormal
@findex __builtin_isless
@findex __builtin_islessequal
@findex __builtin_islessgreater
@@ -11496,7 +11500,54 @@ constant values and they must appear in this order: @code{FP_NAN},
@code{FP_INFINITE}, @code{FP_NORMAL}, @code{FP_SUBNORMAL} and
@code{FP_ZERO}. The ellipsis is for exactly one floating-point value
to classify. GCC treats the last argument as type-generic, which
-means it does not do default promotion from float to double.
+means it does not do default promotion from @code{float} to @code{double}.
+@end deftypefn
+
+@deftypefn {Built-in Function} int __builtin_isnan (...)
+This built-in implements the C99 isnan functionality which checks if
+the given argument represents a NaN. The return value of the
+function will either be a 0 (false) or a 1 (true).
+On most systems, when an IEEE 754 floating-point type is used this
+built-in does not produce a signal when a signaling NaN is used.
+
+GCC treats the argument as type-generic, which means it does
+not do default promotion from @code{float} to @code{double}.
+@end deftypefn
+
+@deftypefn {Built-in Function} int __builtin_isinf (...)
+This built-in implements the C99 isinf functionality which checks if
+the given argument represents an infinite number. The return
+value of the function will either be a 0 (false) or a 1 (true).
+
+GCC treats the argument as type-generic, which means it does
+not do default promotion from @code{float} to @code{double}.
+@end deftypefn
+
+@deftypefn {Built-in Function} int __builtin_isnormal (...)
+This built-in implements the C99 isnormal functionality which checks if
+the given argument represents a normal number. The return
+value of the function will either be a 0 (false) or a 1 (true).
+
+GCC treats the argument as type-generic, which means it does
+not do default promotion from @code{float} to @code{double}.
+@end deftypefn
+
+@deftypefn {Built-in Function} int __builtin_iszero (...)
+This built-in implements the TS 18661-1:2014 iszero functionality which checks if
+the given argument represents the number 0 or -0. The return
+value of the function will either be a 0 (false) or a 1 (true).
+
+GCC treats the argument as type-generic, which means it does
+not do default promotion from @code{float} to @code{double}.
+@end deftypefn
+
+@deftypefn {Built-in Function} int __builtin_issubnormal (...)
+This built-in implements the TS 18661-1:2014 issubnormal functionality which checks if
+the given argument represents a subnormal number. The return
+value of the function will either be a 0 (false) or a 1 (true).
+
+GCC treats the argument as type-generic, which means it does
+not do default promotion from @code{float} to @code{double}.
@end deftypefn
@deftypefn {Built-in Function} double __builtin_inf (void)
diff --git a/gcc/gimple-low.c b/gcc/gimple-low.c
index 64752b67b86b3d01df5f5661e4666df98b7b91d1..739b1dba367749432165129be4115b0f3e72a599 100644
--- a/gcc/gimple-low.c
+++ b/gcc/gimple-low.c
@@ -30,6 +30,8 @@ along with GCC; see the file COPYING3. If not see
#include "calls.h"
#include "gimple-iterator.h"
#include "gimple-low.h"
+#include "stor-layout.h"
+#include "target.h"
/* The differences between High GIMPLE and Low GIMPLE are the
following:
@@ -72,6 +74,13 @@ static void lower_gimple_bind (gimple_stmt_iterator *, struct lower_data *);
static void lower_try_catch (gimple_stmt_iterator *, struct lower_data *);
static void lower_gimple_return (gimple_stmt_iterator *, struct lower_data *);
static void lower_builtin_setjmp (gimple_stmt_iterator *);
+static void lower_builtin_fpclassify (gimple_stmt_iterator *);
+static void lower_builtin_isnan (gimple_stmt_iterator *);
+static void lower_builtin_isinfinite (gimple_stmt_iterator *);
+static void lower_builtin_isnormal (gimple_stmt_iterator *);
+static void lower_builtin_iszero (gimple_stmt_iterator *);
+static void lower_builtin_issubnormal (gimple_stmt_iterator *);
+static void lower_builtin_isfinite (gimple_stmt_iterator *);
static void lower_builtin_posix_memalign (gimple_stmt_iterator *);
@@ -330,18 +339,69 @@ lower_stmt (gimple_stmt_iterator *gsi, struct lower_data *data)
if (decl
&& DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
{
- if (DECL_FUNCTION_CODE (decl) == BUILT_IN_SETJMP)
+ switch (DECL_FUNCTION_CODE (decl))
{
+ case BUILT_IN_SETJMP:
lower_builtin_setjmp (gsi);
data->cannot_fallthru = false;
return;
- }
- else if (DECL_FUNCTION_CODE (decl) == BUILT_IN_POSIX_MEMALIGN
- && flag_tree_bit_ccp
- && gimple_builtin_call_types_compatible_p (stmt, decl))
- {
- lower_builtin_posix_memalign (gsi);
+
+ case BUILT_IN_POSIX_MEMALIGN:
+ if (flag_tree_bit_ccp
+ && gimple_builtin_call_types_compatible_p (stmt, decl))
+ {
+ lower_builtin_posix_memalign (gsi);
+ return;
+ }
+ break;
+
+ case BUILT_IN_FPCLASSIFY:
+ lower_builtin_fpclassify (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ case BUILT_IN_ISINFD32:
+ case BUILT_IN_ISINFD64:
+ case BUILT_IN_ISINFD128:
+ lower_builtin_isinfinite (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ case BUILT_IN_ISNAND32:
+ case BUILT_IN_ISNAND64:
+ case BUILT_IN_ISNAND128:
+ CASE_FLT_FN (BUILT_IN_ISNAN):
+ lower_builtin_isnan (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ case BUILT_IN_ISNORMAL:
+ lower_builtin_isnormal (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ case BUILT_IN_ISZERO:
+ lower_builtin_iszero (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ case BUILT_IN_ISSUBNORMAL:
+ lower_builtin_issubnormal (gsi);
+ data->cannot_fallthru = false;
+ return;
+
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ case BUILT_IN_FINITED32:
+ case BUILT_IN_FINITED64:
+ case BUILT_IN_FINITED128:
+ case BUILT_IN_ISFINITE:
+ lower_builtin_isfinite (gsi);
+ data->cannot_fallthru = false;
return;
+
+ default:
+ break;
}
}
@@ -822,6 +882,812 @@ lower_builtin_setjmp (gimple_stmt_iterator *gsi)
gsi_remove (gsi, false);
}
+/* This function will if ARG is not already a variable or SSA_NAME,
+ create a new temporary TMP and bind ARG to TMP. This new binding is then
+ emitted into SEQ and TMP is returned. */
+static tree
+emit_tree_and_return_var (gimple_seq *seq, tree arg)
+{
+ if (TREE_CODE (arg) == SSA_NAME || VAR_P (arg))
+ return arg;
+
+ tree tmp = create_tmp_reg (TREE_TYPE (arg));
+ gassign *stm = gimple_build_assign (tmp, arg);
+ gimple_seq_add_stmt (seq, stm);
+ return tmp;
+}
+
+/* This function builds an if statement that ends up using explicit branches
+ instead of becoming a ternary conditional select. This function assumes you
+ will fall through to the next statements after the condition for the false
+ branch. The code emitted looks like:
+
+ if (COND)
+ RESULT_VARIABLE = TRUE_BRANCH
+ GOTO EXIT_LABEL
+ else
+ ...
+
+ SEQ is the gimple sequence/buffer to emit any new bindings to.
+ RESULT_VARIABLE is the value to set if COND.
+ EXIT_LABEL is the label to jump to in case COND.
+ COND is condition to use in the conditional statement of the if.
+ TRUE_BRANCH is the value to set RESULT_VARIABLE to if COND. */
+static void
+emit_tree_cond (gimple_seq *seq, tree result_variable, tree exit_label,
+ tree cond, tree true_branch)
+{
+ /* Create labels for fall through. */
+ tree true_label = create_artificial_label (UNKNOWN_LOCATION);
+ tree false_label = create_artificial_label (UNKNOWN_LOCATION);
+ gcond *stmt = gimple_build_cond_from_tree (cond, true_label, false_label);
+ gimple_seq_add_stmt (seq, stmt);
+
+ /* Build the true case. */
+ gimple_seq_add_stmt (seq, gimple_build_label (true_label));
+ tree value = TREE_CONSTANT (true_branch)
+ ? true_branch
+ : emit_tree_and_return_var (seq, true_branch);
+ gimple_seq_add_stmt (seq, gimple_build_assign (result_variable, value));
+ gimple_seq_add_stmt (seq, gimple_build_goto (exit_label));
+
+ /* Build the false case. */
+ gimple_seq_add_stmt (seq, gimple_build_label (false_label));
+}
+
+/* This function returns a variable containing an reinterpreted ARG as an
+ integer.
+
+ SEQ is the gimple sequence/buffer to write any new bindings to.
+ ARG is the floating point number to reinterpret as an integer.
+ LOC is the location to use when doing folding operations. */
+static tree
+get_num_as_int (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+
+ /* Re-interpret the float as an unsigned integer type
+ with equal precision. */
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+ tree conv_arg = fold_build1_loc (loc, VIEW_CONVERT_EXPR, int_arg_type, arg);
+ return emit_tree_and_return_var (seq, conv_arg);
+}
+
+/* Check if ARG which is the floating point number being classified is close
+ enough to IEEE 754 format to be able to go in the early exit code. */
+static bool
+use_ieee_int_mode (tree arg)
+{
+ tree type = TREE_TYPE (arg);
+ machine_mode mode = TYPE_MODE (type);
+
+ const real_format *format = REAL_MODE_FORMAT (mode);
+ machine_mode imode = int_mode_for_mode (mode);
+ bool is_ibm_extended = MODE_COMPOSITE_P (mode);
+
+ return (format->is_binary_ieee_compatible
+ && FLOAT_WORDS_BIG_ENDIAN == WORDS_BIG_ENDIAN
+ /* Check if there's a usable integer mode. */
+ && imode != BLKmode
+ && targetm.scalar_mode_supported_p (imode)
+ && !is_ibm_extended);
+}
+
+/* Perform some IBM extended format fixups on ARG for use by FP functions.
+ This is done by ignoring the lower 64 bits of the number.
+
+ MODE is the machine mode of ARG.
+ TYPE is the type of ARG.
+ LOC is the location to be used in fold functions. Usually is the location
+ of the definition of ARG. */
+static bool
+perform_ibm_extended_fixups (tree *arg, machine_mode *mode,
+ tree *type, location_t loc)
+{
+ bool is_ibm_extended = MODE_COMPOSITE_P (*mode);
+ 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);
+ }
+
+ return is_ibm_extended;
+}
+
+/* Generates code to check if ARG is a normal number. For the FP case we check
+ MIN_VALUE(ARG) <= ABS(ARG) > INF and for the INT value we check the exp and
+ mantissa bits. Returns a variable containing a boolean which has the result
+ of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_normal (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ machine_mode mode = TYPE_MODE (type);
+ const real_format *format = REAL_MODE_FORMAT (mode);
+ const tree bool_type = boolean_type_node;
+
+ /* Perform IBM extended format fixups if required. */
+ bool is_ibm_extended = perform_ibm_extended_fixups (&arg, &mode, &type, loc);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree orig_arg = arg;
+ if (TREE_CODE (arg) != SSA_NAME
+ && (TREE_ADDRESSABLE (arg) != 0
+ || (TREE_CODE (arg) != PARM_DECL
+ && (!VAR_P (arg) || TREE_STATIC (arg)))))
+ orig_arg = save_expr (arg);
+
+ REAL_VALUE_TYPE rinf, rmin;
+ tree arg_p
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, ABS_EXPR, type,
+ arg));
+ char buf[128];
+ real_inf (&rinf);
+ get_min_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&rmin, buf);
+
+ tree inf_exp = fold_build2_loc (loc, LT_EXPR, bool_type, arg_p,
+ build_real (type, rinf));
+ tree min_exp = build_real (type, rmin);
+ 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_p, min_exp);
+ tree eq_min = fold_build2 (EQ_EXPR, integer_type_node,
+ arg_p, 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
+ {
+ min_exp = fold_build2_loc (loc, GE_EXPR, bool_type, arg_p,
+ min_exp);
+ }
+
+ tree res
+ = fold_build2_loc (loc, BIT_AND_EXPR, bool_type,
+ emit_tree_and_return_var (seq, min_exp),
+ emit_tree_and_return_var (seq, inf_exp));
+
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ const tree int_type = unsigned_type_node;
+ const int exp_bits = (GET_MODE_SIZE (mode) * BITS_PER_UNIT) - format->p;
+ const int exp_mask = (1 << exp_bits) - 1;
+
+ /* Get the number reinterpreted as an integer. */
+ tree int_arg = get_num_as_int (seq, arg, loc);
+
+ /* Extract exp bits from the float, where we expect the exponent to be.
+ We create a new type because BIT_FIELD_REF does not allow you to
+ extract less bits than the precision of the storage variable. */
+ tree exp_tmp
+ = fold_build3_loc (loc, BIT_FIELD_REF,
+ build_nonstandard_integer_type (exp_bits, true),
+ int_arg,
+ build_int_cstu (int_type, exp_bits),
+ build_int_cstu (int_type, format->p - 1));
+ tree exp_bitfield = emit_tree_and_return_var (seq, exp_tmp);
+
+ /* Re-interpret the extracted exponent bits as a 32 bit int.
+ This allows us to continue doing operations as int_type. */
+ tree exp
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, NOP_EXPR, int_type,
+ exp_bitfield));
+
+ /* exp_mask & ~1. */
+ tree mask_check
+ = fold_build2_loc (loc, BIT_AND_EXPR, int_type,
+ build_int_cstu (int_type, exp_mask),
+ fold_build1_loc (loc, BIT_NOT_EXPR, int_type,
+ build_int_cstu (int_type, 1)));
+
+ /* (exp + 1) & mask_check.
+ Check to see if exp is not all 0 or all 1. */
+ tree exp_check
+ = fold_build2_loc (loc, BIT_AND_EXPR, int_type,
+ emit_tree_and_return_var (seq,
+ fold_build2_loc (loc, PLUS_EXPR, int_type, exp,
+ build_int_cstu (int_type, 1))),
+ mask_check);
+
+ tree res = fold_build2_loc (loc, NE_EXPR, boolean_type_node,
+ build_int_cstu (int_type, 0),
+ emit_tree_and_return_var (seq, exp_check));
+
+ return emit_tree_and_return_var (seq, res);
+}
+
+/* Generates code to check if ARG is a zero. For both the FP and INT case we
+ check if ARG == 0 (modulo sign bit). Returns a variable containing a boolean
+ which has the result of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_zero (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree res = fold_build2_loc (loc, EQ_EXPR, boolean_type_node, arg,
+ build_real (type, dconst0));
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+
+ /* Get the number reinterpreted as an integer.
+ Shift left to remove the sign. */
+ tree int_arg
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ get_num_as_int (seq, arg, loc),
+ build_int_cstu (int_arg_type, 1));
+
+ /* num << 1 == 0.
+ This checks to see if the number is zero. */
+ tree zero_check
+ = fold_build2_loc (loc, EQ_EXPR, boolean_type_node,
+ build_int_cstu (int_arg_type, 0),
+ emit_tree_and_return_var (seq, int_arg));
+
+ return emit_tree_and_return_var (seq, zero_check);
+}
+
+/* Generates code to check if ARG is a subnormal number. In the FP case we test
+ fabs (ARG) != 0 && fabs (ARG) < MIN_VALUE (ARG) and in the INT case we check
+ the exp and mantissa bits on ARG. Returns a variable containing a boolean
+ which has the result of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_subnormal (gimple_seq *seq, tree arg, location_t loc)
+{
+ const tree bool_type = boolean_type_node;
+
+ tree type = TREE_TYPE (arg);
+
+ machine_mode mode = TYPE_MODE (type);
+ const real_format *format = REAL_MODE_FORMAT (mode);
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree arg_p
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, ABS_EXPR, type,
+ arg));
+ REAL_VALUE_TYPE r;
+ char buf[128];
+ get_min_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&r, buf);
+ tree subnorm = fold_build2_loc (loc, LT_EXPR, bool_type,
+ arg_p, build_real (type, r));
+
+ tree zero = fold_build2_loc (loc, GT_EXPR, bool_type, arg_p,
+ build_real (type, dconst0));
+
+ tree res
+ = fold_build2_loc (loc, BIT_AND_EXPR, bool_type,
+ emit_tree_and_return_var (seq, subnorm),
+ emit_tree_and_return_var (seq, zero));
+
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ /* Get the number reinterpreted as an integer.
+ Shift left to remove the sign. */
+ tree int_arg
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ get_num_as_int (seq, arg, loc),
+ build_int_cstu (int_arg_type, 1));
+
+ /* Check for a zero exponent and non-zero mantissa.
+ This can be done with two comparisons by first apply a
+ removing the sign bit and checking if the value is larger
+ than the mantissa mask. */
+
+ /* This creates a mask to be used to check the mantissa value in the shifted
+ integer representation of the fpnum. */
+ tree significant_bit = build_int_cstu (int_arg_type, format->p - 1);
+ tree mantissa_mask
+ = fold_build2_loc (loc, MINUS_EXPR, int_arg_type,
+ fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ build_int_cstu (int_arg_type, 2),
+ significant_bit),
+ build_int_cstu (int_arg_type, 1));
+
+ /* Check if exponent is zero and mantissa is not. */
+ tree subnorm_cond_tmp
+ = fold_build2_loc (loc, LE_EXPR, bool_type,
+ emit_tree_and_return_var (seq, int_arg),
+ mantissa_mask);
+
+ tree subnorm_cond = emit_tree_and_return_var (seq, subnorm_cond_tmp);
+
+ tree zero_cond
+ = fold_build2_loc (loc, GT_EXPR, boolean_type_node,
+ emit_tree_and_return_var (seq, int_arg),
+ build_int_cstu (int_arg_type, 0));
+
+ tree subnorm_check
+ = fold_build2_loc (loc, BIT_AND_EXPR, boolean_type_node,
+ emit_tree_and_return_var (seq, subnorm_cond),
+ emit_tree_and_return_var (seq, zero_cond));
+
+ return emit_tree_and_return_var (seq, subnorm_check);
+}
+
+/* Generates code to check if ARG is an infinity. In the FP case we test
+ FABS(ARG) == INF and in the INT case we check the bits on the exp and
+ mantissa. Returns a variable containing a boolean which has the result
+ of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_infinity (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ machine_mode mode = TYPE_MODE (type);
+ const tree bool_type = boolean_type_node;
+
+ if (!HONOR_INFINITIES (mode))
+ {
+ return build_int_cst (bool_type, false);
+ }
+
+ /* Perform IBM extended format fixups if required. */
+ perform_ibm_extended_fixups (&arg, &mode, &type, loc);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree arg_p
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, ABS_EXPR, type,
+ arg));
+ REAL_VALUE_TYPE r;
+ real_inf (&r);
+ tree res = fold_build2_loc (loc, EQ_EXPR, bool_type, arg_p,
+ build_real (type, r));
+
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ const real_format *format = REAL_MODE_FORMAT (mode);
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+
+ /* This creates a mask to be used to check the exp value in the shifted
+ integer representation of the fpnum. */
+ const int exp_bits = (GET_MODE_SIZE (mode) * BITS_PER_UNIT) - format->p;
+ gcc_assert (format->p > 0);
+
+ tree significant_bit = build_int_cstu (int_arg_type, format->p);
+ tree exp_mask
+ = fold_build2_loc (loc, MINUS_EXPR, int_arg_type,
+ fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ build_int_cstu (int_arg_type, 2),
+ build_int_cstu (int_arg_type,
+ exp_bits - 1)),
+ build_int_cstu (int_arg_type, 1));
+
+ /* Get the number reinterpreted as an integer.
+ Shift left to remove the sign. */
+ tree int_arg
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ get_num_as_int (seq, arg, loc),
+ build_int_cstu (int_arg_type, 1));
+
+ /* This mask checks to see if the exp has all bits set and mantissa no
+ bits set. */
+ tree inf_mask
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ exp_mask, significant_bit);
+
+ /* Check if exponent has all bits set and mantissa is 0. */
+ tree inf_check
+ = emit_tree_and_return_var(seq,
+ fold_build2_loc (loc, EQ_EXPR, bool_type,
+ emit_tree_and_return_var(seq, int_arg),
+ inf_mask));
+
+ return emit_tree_and_return_var (seq, inf_check);
+}
+
+/* Generates code to check if ARG is a finite number. In the FP case we check
+ if FABS(ARG) <= MAX_VALUE(ARG) and in the INT case we check the exp and
+ mantissa bits. Returns a variable containing a boolean which has the result
+ of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_finite (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ machine_mode mode = TYPE_MODE (type);
+ const tree bool_type = boolean_type_node;
+
+ if (!HONOR_NANS (arg) && !HONOR_INFINITIES (arg))
+ {
+ return build_int_cst (bool_type, true);
+ }
+
+ /* Perform IBM extended format fixups if required. */
+ perform_ibm_extended_fixups (&arg, &mode, &type, loc);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree arg_p
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, ABS_EXPR, type,
+ arg));
+ REAL_VALUE_TYPE rmax;
+ char buf[128];
+ get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&rmax, buf);
+
+ tree res = fold_build2_loc (loc, LE_EXPR, bool_type, arg_p,
+ build_real (type, rmax));
+
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ const real_format *format = REAL_MODE_FORMAT (mode);
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+
+ /* This creates a mask to be used to check the exp value in the shifted
+ integer representation of the fpnum. */
+ const int exp_bits = (GET_MODE_SIZE (mode) * BITS_PER_UNIT) - format->p;
+ gcc_assert (format->p > 0);
+
+ tree significant_bit = build_int_cstu (int_arg_type, format->p);
+ tree exp_mask
+ = fold_build2_loc (loc, MINUS_EXPR, int_arg_type,
+ fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ build_int_cstu (int_arg_type, 2),
+ build_int_cstu (int_arg_type,
+ exp_bits - 1)),
+ build_int_cstu (int_arg_type, 1));
+
+ /* Get the number reinterpreted as an integer.
+ Shift left to remove the sign. */
+ tree int_arg
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ get_num_as_int (seq, arg, loc),
+ build_int_cstu (int_arg_type, 1));
+
+ /* This mask checks to see if the exp has all bits set and mantissa no
+ bits set. */
+ tree inf_mask
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ exp_mask, significant_bit);
+
+ /* Check if exponent has all bits set and mantissa is 0. */
+ tree inf_check_tmp
+ = fold_build2_loc (loc, LT_EXPR, bool_type,
+ emit_tree_and_return_var (seq, int_arg),
+ inf_mask);
+
+ tree inf_check = emit_tree_and_return_var (seq, inf_check_tmp);
+
+ return emit_tree_and_return_var (seq, inf_check);
+}
+
+/* Generates code to check if ARG is a NaN. In the FP case we simply check if
+ ARG != ARG and in the INT case we check the bits in the exp and mantissa.
+ Returns a variable containing a boolean which has the result of the check.
+
+ SEQ is the buffer to use to emit the gimple instructions into.
+ LOC is the location to use during fold calls. */
+static tree
+is_nan (gimple_seq *seq, tree arg, location_t loc)
+{
+ tree type = TREE_TYPE (arg);
+
+ machine_mode mode = TYPE_MODE (type);
+ const tree bool_type = boolean_type_node;
+
+ if (!HONOR_NANS (mode))
+ {
+ return build_int_cst (bool_type, false);
+ }
+
+ const real_format *format = REAL_MODE_FORMAT (mode);
+
+ /* Perform IBM extended format fixups if required. */
+ perform_ibm_extended_fixups (&arg, &mode, &type, loc);
+
+ /* If not using optimized route then exit early. */
+ if (!use_ieee_int_mode (arg))
+ {
+ tree arg_p
+ = emit_tree_and_return_var (seq, fold_build1_loc (loc, ABS_EXPR, type,
+ arg));
+ tree res
+ = fold_build2_loc (loc, UNORDERED_EXPR, bool_type,arg_p, arg_p);
+
+ return emit_tree_and_return_var (seq, res);
+ }
+
+ const HOST_WIDE_INT type_width = TYPE_PRECISION (type);
+ tree int_arg_type = build_nonstandard_integer_type (type_width, true);
+
+ /* This creates a mask to be used to check the exp value in the shifted
+ integer representation of the fpnum. */
+ const int exp_bits = (GET_MODE_SIZE (mode) * BITS_PER_UNIT) - format->p;
+ tree significant_bit = build_int_cstu (int_arg_type, format->p);
+ tree exp_mask
+ = fold_build2_loc (loc, MINUS_EXPR, int_arg_type,
+ fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ build_int_cstu (int_arg_type, 2),
+ build_int_cstu (int_arg_type,
+ exp_bits - 1)),
+ build_int_cstu (int_arg_type, 1));
+
+ /* Get the number reinterpreted as an integer.
+ Shift left to remove the sign. */
+ tree int_arg
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ get_num_as_int (seq, arg, loc),
+ build_int_cstu (int_arg_type, 1));
+
+ /* This mask checks to see if the exp has all bits set and mantissa no
+ bits set. */
+ tree inf_mask
+ = fold_build2_loc (loc, LSHIFT_EXPR, int_arg_type,
+ exp_mask, significant_bit);
+
+ /* Check if exponent has all bits set and mantissa is not 0. */
+ tree nan_check
+ = emit_tree_and_return_var(seq,
+ fold_build2_loc (loc, GT_EXPR, bool_type,
+ emit_tree_and_return_var(seq, int_arg),
+ inf_mask));
+
+ return emit_tree_and_return_var (seq, nan_check);
+}
+
+/* Validates a single argument from the arguments list CALL at position INDEX.
+ The extracted parameter is compared against the expected type CODE.
+
+ A boolean is returned indicating if the parameter exist and if of the
+ expected type. */
+static bool
+gimple_validate_arg (gimple* call, int index, enum tree_code code)
+{
+ const tree arg = gimple_call_arg (call, index);
+ if (!arg)
+ return false;
+ else if (code == POINTER_TYPE)
+ return POINTER_TYPE_P (TREE_TYPE (arg));
+ else if (code == INTEGER_TYPE)
+ return INTEGRAL_TYPE_P (TREE_TYPE (arg));
+ return code == TREE_CODE (TREE_TYPE (arg));
+}
+
+/* Lowers calls to __builtin_fpclassify to
+ fpclassify (x) ->
+ isnormal(x) ? FP_NORMAL :
+ iszero (x) ? FP_ZERO :
+ isnan (x) ? FP_NAN :
+ isinfinite (x) ? FP_INFINITE :
+ FP_SUBNORMAL.
+
+ The code may use integer arithmentic if it decides
+ that the produced assembly would be faster. This can only be done
+ for numbers that are similar to IEEE-754 in format.
+
+ This builtin will generate code to return the appropriate floating
+ point classification depending on the value of the floating point
+ number passed in. The possible return values must be supplied as
+ int arguments to the call in the following order: FP_NAN, FP_INFINITE,
+ FP_NORMAL, FP_SUBNORMAL and FP_ZERO. The ellipses is for exactly
+ one floating point argument which is "type generic".
+
+ GSI is the gimple iterator containing the fpclassify call to lower.
+ The call will be expanded and replaced inline in the given GSI. */
+static void
+lower_builtin_fpclassify (gimple_stmt_iterator *gsi)
+{
+ gimple *call = gsi_stmt (*gsi);
+ location_t loc = gimple_location (call);
+
+ /* Verify the required arguments in the original call. */
+ if (gimple_call_num_args (call) != 6
+ || !gimple_validate_arg (call, 0, INTEGER_TYPE)
+ || !gimple_validate_arg (call, 1, INTEGER_TYPE)
+ || !gimple_validate_arg (call, 2, INTEGER_TYPE)
+ || !gimple_validate_arg (call, 3, INTEGER_TYPE)
+ || !gimple_validate_arg (call, 4, INTEGER_TYPE)
+ || !gimple_validate_arg (call, 5, REAL_TYPE))
+ return;
+
+ /* Collect the arguments from the call. */
+ tree fp_nan = gimple_call_arg (call, 0);
+ tree fp_infinite = gimple_call_arg (call, 1);
+ tree fp_normal = gimple_call_arg (call, 2);
+ tree fp_subnormal = gimple_call_arg (call, 3);
+ tree fp_zero = gimple_call_arg (call, 4);
+ tree arg = gimple_call_arg (call, 5);
+
+ gimple_seq body = NULL;
+
+ /* Create label to jump to to exit. */
+ tree done_label = create_artificial_label (UNKNOWN_LOCATION);
+ tree dest;
+ tree orig_dest = dest = gimple_call_lhs (call);
+ if (orig_dest && TREE_CODE (orig_dest) == SSA_NAME)
+ dest = create_tmp_reg (TREE_TYPE (orig_dest));
+
+ emit_tree_cond (&body, dest, done_label,
+ is_normal (&body, arg, loc), fp_normal);
+ emit_tree_cond (&body, dest, done_label,
+ is_zero (&body, arg, loc), fp_zero);
+ emit_tree_cond (&body, dest, done_label,
+ is_nan (&body, arg, loc), fp_nan);
+ emit_tree_cond (&body, dest, done_label,
+ is_infinity (&body, arg, loc), fp_infinite);
+
+ /* And finally, emit the default case if nothing else matches.
+ This replaces the call to is_subnormal. */
+ gimple_seq_add_stmt (&body, gimple_build_assign (dest, fp_subnormal));
+ gimple_seq_add_stmt (&body, gimple_build_label (done_label));
+
+ /* Build orig_dest = dest if necessary. */
+ if (dest != orig_dest)
+ {
+ gimple_seq_add_stmt (&body, gimple_build_assign (orig_dest, dest));
+ }
+
+ gsi_insert_seq_before (gsi, body, GSI_SAME_STMT);
+
+
+ /* Remove the call to __builtin_fpclassify. */
+ gsi_remove (gsi, false);
+}
+
+/* Generic wrapper for the is_nan, is_normal, is_subnormal, is_zero, etc.
+ All these functions have the same setup. The wrapper validates the parameter
+ and also creates the branches and labels required to properly invoke.
+ This has been generalize and the function to call is passed as argument FNDECL.
+
+ GSI is the gimple iterator containing the fpclassify call to lower.
+ The call will be expanded and replaced inline in the given GSI. */
+static void
+gen_call_fp_builtin (gimple_stmt_iterator *gsi,
+ tree (*fndecl)(gimple_seq *, tree, location_t))
+{
+ gimple *call = gsi_stmt (*gsi);
+ location_t loc = gimple_location (call);
+
+ /* Verify the required arguments in the original call. */
+ if (gimple_call_num_args (call) != 1
+ || !gimple_validate_arg (call, 0, REAL_TYPE))
+ return;
+
+ tree arg = gimple_call_arg (call, 0);
+ gimple_seq body = NULL;
+
+ /* Create label to jump to to exit. */
+ tree done_label = create_artificial_label (UNKNOWN_LOCATION);
+ tree dest;
+ tree orig_dest = dest = gimple_call_lhs (call);
+ tree type = TREE_TYPE (orig_dest);
+ if (orig_dest && TREE_CODE (orig_dest) == SSA_NAME)
+ dest = create_tmp_reg (type);
+
+ tree t_true = build_int_cst (type, true);
+ tree t_false = build_int_cst (type, false);
+
+ emit_tree_cond (&body, dest, done_label,
+ fndecl (&body, arg, loc), t_true);
+
+ /* And finally, emit the default case if nothing else matches.
+ This replaces the call to false. */
+ gimple_seq_add_stmt (&body, gimple_build_assign (dest, t_false));
+ gimple_seq_add_stmt (&body, gimple_build_label (done_label));
+
+ /* Build orig_dest = dest if necessary. */
+ if (dest != orig_dest)
+ {
+ gimple_seq_add_stmt (&body, gimple_build_assign (orig_dest, dest));
+ }
+
+ gsi_insert_seq_before (gsi, body, GSI_SAME_STMT);
+
+ /* Remove the call to the builtin. */
+ gsi_remove (gsi, false);
+}
+
+/* Lower and expand calls to __builtin_isnan in GSI. */
+static void
+lower_builtin_isnan (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_nan);
+}
+
+/* Lower and expand calls to __builtin_isinfinite in GSI. */
+static void
+lower_builtin_isinfinite (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_infinity);
+}
+
+/* Lower and expand calls to __builtin_isnormal in GSI. */
+static void
+lower_builtin_isnormal (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_normal);
+}
+
+/* Lower and expand calls to __builtin_iszero in GSI. */
+static void
+lower_builtin_iszero (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_zero);
+}
+
+/* Lower and expand calls to __builtin_issubnormal in GSI. */
+static void
+lower_builtin_issubnormal (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_subnormal);
+}
+
+/* Lower and expand calls to __builtin_isfinite in GSI. */
+static void
+lower_builtin_isfinite (gimple_stmt_iterator *gsi)
+{
+ gen_call_fp_builtin (gsi, &is_finite);
+}
+
/* Lower calls to posix_memalign to
res = posix_memalign (ptr, align, size);
if (res == 0)
diff --git a/gcc/real.h b/gcc/real.h
index 59af580e78f2637be84f71b98b45ec6611053222..4b1b92138e07f43a175a2cbee4d952afad5898f7 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -161,6 +161,19 @@ struct real_format
bool has_signed_zero;
bool qnan_msb_set;
bool canonical_nan_lsbs_set;
+
+ /* This flag indicates whether the format is suitable for the optimized
+ code paths for the __builtin_fpclassify function and friends. For
+ this, the format must be a base 2 representation with the sign bit as
+ the most-significant bit followed by (exp <= 32) exponent bits
+ followed by the mantissa bits. It must be possible to interpret the
+ bits of the floating-point representation as an integer. NaNs and
+ INFs (if available) must be represented by the same schema used by
+ IEEE 754. (NaNs must be represented by an exponent with all bits 1,
+ any mantissa except all bits 0 and any sign bit. +INF and -INF must be
+ represented by an exponent with all bits 1, a mantissa with all bits 0 and
+ a sign bit of 0 and 1 respectively.) */
+ bool is_binary_ieee_compatible;
const char *name;
};
@@ -511,6 +524,11 @@ extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *);
float string. BUF must be large enough to contain the result. */
extern void get_max_float (const struct real_format *, char *, size_t);
+/* Write into BUF the smallest positive normalized number x,
+ such that b**(x-1) is normalized. BUF must be large enough
+ to contain the result. */
+extern void get_min_float (const struct real_format *, char *, size_t);
+
#ifndef GENERATOR_FILE
/* real related routines. */
extern wide_int real_to_integer (const REAL_VALUE_TYPE *, bool *, int);
diff --git a/gcc/real.c b/gcc/real.c
index 66e88e2ad366f7848609d157074c80420d778bcf..20c907a6d543c73ba62aa9a8ddf6973d82de7832 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. */
diff --git a/gcc/testsuite/gcc.dg/builtins-43.c b/gcc/testsuite/gcc.dg/builtins-43.c
index f7c318edf084104b9b820e18e631ed61e760569e..5d41c28aef8619f06658f45846ae15dd8b4987ed 100644
--- a/gcc/testsuite/gcc.dg/builtins-43.c
+++ b/gcc/testsuite/gcc.dg/builtins-43.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O1 -fno-trapping-math -fno-finite-math-only -fdump-tree-gimple -fdump-tree-optimized" } */
+/* { dg-options "-O1 -fno-trapping-math -fno-finite-math-only -fdump-tree-lower -fdump-tree-optimized" } */
extern void f(int);
extern void link_error ();
@@ -51,7 +51,7 @@ main ()
/* Check that all instances of __builtin_isnan were folded. */
-/* { dg-final { scan-tree-dump-times "isnan" 0 "gimple" } } */
+/* { dg-final { scan-tree-dump-times "isnan" 0 "lower" } } */
/* Check that all instances of link_error were subject to DCE. */
/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized" } } */
diff --git a/gcc/testsuite/gcc.dg/fold-notunord.c b/gcc/testsuite/gcc.dg/fold-notunord.c
deleted file mode 100644
index ca345154ac204cb5f380855828421b7f88d49052..0000000000000000000000000000000000000000
--- a/gcc/testsuite/gcc.dg/fold-notunord.c
+++ /dev/null
@@ -1,9 +0,0 @@
-/* { dg-do compile } */
-/* { dg-options "-O -ftrapping-math -fdump-tree-optimized" } */
-
-int f (double d)
-{
- return !__builtin_isnan (d);
-}
-
-/* { dg-final { scan-tree-dump " ord " "optimized" } } */
diff --git a/gcc/testsuite/gcc.dg/pr28796-1.c b/gcc/testsuite/gcc.dg/pr28796-1.c
index 077118a298878441e812410f3a6bf3707fb1d839..a57b4e350af1bc45344106fdeab4b32ef87f233f 100644
--- a/gcc/testsuite/gcc.dg/pr28796-1.c
+++ b/gcc/testsuite/gcc.dg/pr28796-1.c
@@ -1,5 +1,5 @@
/* { dg-do link } */
-/* { dg-options "-ffinite-math-only" } */
+/* { dg-options "-ffinite-math-only -O2" } */
extern void link_error(void);
diff --git a/gcc/testsuite/gcc.dg/tg-tests.h b/gcc/testsuite/gcc.dg/tg-tests.h
index 0cf1f6452584962cebda999b5e8c7a61180d7830..cbb707c54b8437aada0cc205b1819369ada95665 100644
--- a/gcc/testsuite/gcc.dg/tg-tests.h
+++ b/gcc/testsuite/gcc.dg/tg-tests.h
@@ -11,6 +11,7 @@ void __attribute__ ((__noinline__))
foo_1 (float f, double d, long double ld,
int res_unord, int res_isnan, int res_isinf,
int res_isinf_sign, int res_isfin, int res_isnorm,
+ int res_iszero, int res_issubnorm,
int res_signbit, int classification)
{
if (__builtin_isunordered (f, 0) != res_unord)
@@ -80,6 +81,20 @@ foo_1 (float f, double d, long double ld,
if (__builtin_finitel (ld) != res_isfin)
__builtin_abort ();
+ if (__builtin_iszero (f) != res_iszero)
+ __builtin_abort ();
+ if (__builtin_iszero (d) != res_iszero)
+ __builtin_abort ();
+ if (__builtin_iszero (ld) != res_iszero)
+ __builtin_abort ();
+
+ if (__builtin_issubnormal (f) != res_issubnorm)
+ __builtin_abort ();
+ if (__builtin_issubnormal (d) != res_issubnorm)
+ __builtin_abort ();
+ if (__builtin_issubnormal (ld) != res_issubnorm)
+ __builtin_abort ();
+
/* Sign bit of zeros and nans is not preserved in unsafe math mode. */
#ifdef UNSAFE
if (!res_isnan && f != 0 && d != 0 && ld != 0)
@@ -115,12 +130,13 @@ foo_1 (float f, double d, long double ld,
void __attribute__ ((__noinline__))
foo (float f, double d, long double ld,
int res_unord, int res_isnan, int res_isinf,
- int res_isfin, int res_isnorm, int classification)
+ int res_isfin, int res_isnorm, int res_iszero,
+ int res_issubnorm, int classification)
{
- foo_1 (f, d, ld, res_unord, res_isnan, res_isinf, res_isinf, res_isfin, res_isnorm, 0, classification);
+ foo_1 (f, d, ld, res_unord, res_isnan, res_isinf, res_isinf, res_isfin, res_isnorm, res_iszero, res_issubnorm, 0, classification);
/* Try all the values negated as well. All will have the sign bit set,
except for the nan. */
- foo_1 (-f, -d, -ld, res_unord, res_isnan, res_isinf, -res_isinf, res_isfin, res_isnorm, 1, classification);
+ foo_1 (-f, -d, -ld, res_unord, res_isnan, res_isinf, -res_isinf, res_isfin, res_isnorm, res_iszero, res_issubnorm, 1, classification);
}
int __attribute__ ((__noinline__))
@@ -132,35 +148,35 @@ main_tests (void)
/* Test NaN. */
f = __builtin_nanf(""); d = __builtin_nan(""); ld = __builtin_nanl("");
- foo(f, d, ld, /*unord=*/ 1, /*isnan=*/ 1, /*isinf=*/ 0, /*isfin=*/ 0, /*isnorm=*/ 0, FP_NAN);
+ foo(f, d, ld, /*unord=*/ 1, /*isnan=*/ 1, /*isinf=*/ 0, /*isfin=*/ 0, /*isnorm=*/ 0, /*iszero=*/0, /*issubnorm=*/0, FP_NAN);
/* Test infinity. */
f = __builtin_inff(); d = __builtin_inf(); ld = __builtin_infl();
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 1, /*isfin=*/ 0, /*isnorm=*/ 0, FP_INFINITE);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 1, /*isfin=*/ 0, /*isnorm=*/ 0, /*iszero=*/0, /*issubnorm=*/0, FP_INFINITE);
/* Test zero. */
f = 0; d = 0; ld = 0;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 0, FP_ZERO);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 0, /*iszero=*/1, /*issubnorm=*/0, FP_ZERO);
/* Test one. */
f = 1; d = 1; ld = 1;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, FP_NORMAL);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, /*iszero=*/0, /*issubnorm=*/0, FP_NORMAL);
/* Test minimum values. */
f = __FLT_MIN__; d = __DBL_MIN__; ld = __LDBL_MIN__;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, FP_NORMAL);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, /*iszero=*/0, /*issubnorm=*/0, FP_NORMAL);
/* Test subnormal values. */
f = __FLT_MIN__/2; d = __DBL_MIN__/2; ld = __LDBL_MIN__/2;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 0, FP_SUBNORMAL);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 0, /*iszero=*/0, /*issubnorm=*/1, FP_SUBNORMAL);
/* Test maximum values. */
f = __FLT_MAX__; d = __DBL_MAX__; ld = __LDBL_MAX__;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, FP_NORMAL);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 0, /*isfin=*/ 1, /*isnorm=*/ 1, /*iszero=*/0, /*issubnorm=*/0, FP_NORMAL);
/* Test overflow values. */
f = __FLT_MAX__*2; d = __DBL_MAX__*2; ld = __LDBL_MAX__*2;
- foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 1, /*isfin=*/ 0, /*isnorm=*/ 0, FP_INFINITE);
+ foo(f, d, ld, /*unord=*/ 0, /*isnan=*/ 0, /*isinf=*/ 1, /*isfin=*/ 0, /*isnorm=*/ 0, /*iszero=*/0, /*issubnorm=*/0, FP_INFINITE);
return 0;
}
diff --git a/gcc/testsuite/gcc.dg/torture/float128-tg-4.c b/gcc/testsuite/gcc.dg/torture/float128-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..ec9d3ad41e24280978707888590eec1b562207f0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float128-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float128 type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float128 } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float128_runtime } */
+
+#define WIDTH 128
+#define EXT 0
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float128x-tg-4.c b/gcc/testsuite/gcc.dg/torture/float128x-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..0ede861716750453a86c9abc703ad0b2826674c6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float128x-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float128x type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float128x } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float128x_runtime } */
+
+#define WIDTH 128
+#define EXT 1
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float16-tg-4.c b/gcc/testsuite/gcc.dg/torture/float16-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..007c4c224ea95537c31185d0aff964d1975f2190
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float16-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float16 type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float16 } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float16_runtime } */
+
+#define WIDTH 16
+#define EXT 0
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float32-tg-4.c b/gcc/testsuite/gcc.dg/torture/float32-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..c7f8353da2cffdfc2c2f58f5da3d5363b95e6f91
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float32-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float32 type-generic built-in functions: __builtin_f__builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float32 } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float32_runtime } */
+
+#define WIDTH 32
+#define EXT 0
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float32x-tg-4.c b/gcc/testsuite/gcc.dg/torture/float32x-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..0d7a592920aca112d5f6409e565d4582c253c977
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float32x-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float32x type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float32x } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float32x_runtime } */
+
+#define WIDTH 32
+#define EXT 1
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float64-tg-4.c b/gcc/testsuite/gcc.dg/torture/float64-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..bb25a22a68e60ce2717ab3583bbec595dd563c35
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float64-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float64 type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float64 } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float64_runtime } */
+
+#define WIDTH 64
+#define EXT 0
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/float64x-tg-4.c b/gcc/testsuite/gcc.dg/torture/float64x-tg-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..82305d916b8bd75131e2c647fd37f74cadbc8f1d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/float64x-tg-4.c
@@ -0,0 +1,11 @@
+/* Test _Float64x type-generic built-in functions: __builtin_iszero,
+ __builtin_issubnormal. */
+/* { dg-do run } */
+/* { dg-options "" } */
+/* { dg-add-options float64x } */
+/* { dg-add-options ieee } */
+/* { dg-require-effective-target float64x_runtime } */
+
+#define WIDTH 64
+#define EXT 1
+#include "floatn-tg-4.h"
diff --git a/gcc/testsuite/gcc.dg/torture/floatn-tg-4.h b/gcc/testsuite/gcc.dg/torture/floatn-tg-4.h
new file mode 100644
index 0000000000000000000000000000000000000000..aa3448c090cf797a1525b1045ffebeed79cace40
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/floatn-tg-4.h
@@ -0,0 +1,99 @@
+/* Tests for _FloatN / _FloatNx types: compile and execution tests for
+ type-generic built-in functions: __builtin_iszero, __builtin_issubnormal.
+ Before including this file, define WIDTH as the value N; define EXT to 1
+ for _FloatNx and 0 for _FloatN. */
+
+#define __STDC_WANT_IEC_60559_TYPES_EXT__
+#include <float.h>
+
+#define CONCATX(X, Y) X ## Y
+#define CONCAT(X, Y) CONCATX (X, Y)
+#define CONCAT3(X, Y, Z) CONCAT (CONCAT (X, Y), Z)
+#define CONCAT4(W, X, Y, Z) CONCAT (CONCAT (CONCAT (W, X), Y), Z)
+
+#if EXT
+# define TYPE CONCAT3 (_Float, WIDTH, x)
+# define CST(C) CONCAT4 (C, f, WIDTH, x)
+# define MAX CONCAT3 (FLT, WIDTH, X_MAX)
+# define MIN CONCAT3 (FLT, WIDTH, X_MIN)
+# define TRUE_MIN CONCAT3 (FLT, WIDTH, X_TRUE_MIN)
+#else
+# define TYPE CONCAT (_Float, WIDTH)
+# define CST(C) CONCAT3 (C, f, WIDTH)
+# define MAX CONCAT3 (FLT, WIDTH, _MAX)
+# define MIN CONCAT3 (FLT, WIDTH, _MIN)
+# define TRUE_MIN CONCAT3 (FLT, WIDTH, _TRUE_MIN)
+#endif
+
+extern void exit (int);
+extern void abort (void);
+
+volatile TYPE inf = __builtin_inf (), nanval = __builtin_nan ("");
+volatile TYPE neginf = -__builtin_inf (), negnanval = -__builtin_nan ("");
+volatile TYPE zero = CST (0.0), negzero = -CST (0.0), one = CST (1.0);
+volatile TYPE max = MAX, negmax = -MAX, min = MIN, negmin = -MIN;
+volatile TYPE true_min = TRUE_MIN, negtrue_min = -TRUE_MIN;
+volatile TYPE sub_norm = MIN / 2.0;
+
+int
+main (void)
+{
+ if (__builtin_iszero (inf) == 1)
+ abort ();
+ if (__builtin_iszero (nanval) == 1)
+ abort ();
+ if (__builtin_iszero (neginf) == 1)
+ abort ();
+ if (__builtin_iszero (negnanval) == 1)
+ abort ();
+ if (__builtin_iszero (zero) != 1)
+ abort ();
+ if (__builtin_iszero (negzero) != 1)
+ abort ();
+ if (__builtin_iszero (one) == 1)
+ abort ();
+ if (__builtin_iszero (max) == 1)
+ abort ();
+ if (__builtin_iszero (negmax) == 1)
+ abort ();
+ if (__builtin_iszero (min) == 1)
+ abort ();
+ if (__builtin_iszero (negmin) == 1)
+ abort ();
+ if (__builtin_iszero (true_min) == 1)
+ abort ();
+ if (__builtin_iszero (negtrue_min) == 1)
+ abort ();
+ if (__builtin_iszero (sub_norm) == 1)
+ abort ();
+
+ if (__builtin_issubnormal (inf) == 1)
+ abort ();
+ if (__builtin_issubnormal (nanval) == 1)
+ abort ();
+ if (__builtin_issubnormal (neginf) == 1)
+ abort ();
+ if (__builtin_issubnormal (negnanval) == 1)
+ abort ();
+ if (__builtin_issubnormal (zero) == 1)
+ abort ();
+ if (__builtin_issubnormal (negzero) == 1)
+ abort ();
+ if (__builtin_issubnormal (one) == 1)
+ abort ();
+ if (__builtin_issubnormal (max) == 1)
+ abort ();
+ if (__builtin_issubnormal (negmax) == 1)
+ abort ();
+ if (__builtin_issubnormal (min) == 1)
+ abort ();
+ if (__builtin_issubnormal (negmin) == 1)
+ abort ();
+ if (__builtin_issubnormal (true_min) != 1)
+ abort ();
+ if (__builtin_issubnormal (negtrue_min) != 1)
+ abort ();
+ if (__builtin_issubnormal (sub_norm) != 1)
+ abort ();
+ exit (0);
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/builtin-fpclassify.c b/gcc/testsuite/gcc.target/aarch64/builtin-fpclassify.c
new file mode 100644
index 0000000000000000000000000000000000000000..3a1bf956bfcedcc15dc1cbacfe2f0b663b31c3cc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/builtin-fpclassify.c
@@ -0,0 +1,22 @@
+/* This file checks the code generation for the new __builtin_fpclassify.
+ because checking the exact assembly isn't very useful, we'll just be checking
+ for the presence of certain instructions and the omition of others. */
+/* { dg-options "-O2" } */
+/* { dg-do compile } */
+/* { dg-final { scan-assembler-not "\[ \t\]?fabs\[ \t\]?" } } */
+/* { dg-final { scan-assembler-not "\[ \t\]?fcmp\[ \t\]?" } } */
+/* { dg-final { scan-assembler-not "\[ \t\]?fcmpe\[ \t\]?" } } */
+/* { dg-final { scan-assembler "\[ \t\]?ubfx\[ \t\]?" } } */
+
+#include <stdio.h>
+#include <math.h>
+
+/*
+ fp_nan = args[0];
+ fp_infinite = args[1];
+ fp_normal = args[2];
+ fp_subnormal = args[3];
+ fp_zero = args[4];
+*/
+
+int f(double x) { return __builtin_fpclassify(0, 1, 4, 3, 2, x); }