From: Aldy Hernandez <aldyh@redhat.com>
To: Richard Biener <richard.guenther@gmail.com>
Cc: GCC patches <gcc-patches@gcc.gnu.org>,
Jakub Jelinek <jakub@redhat.com>,
Andrew MacLeod <amacleod@redhat.com>
Subject: Re: [PATCH] frange: drop endpoints to min/max representable numbers for -ffinite-math-only.
Date: Fri, 23 Sep 2022 09:21:00 +0200 [thread overview]
Message-ID: <CAGm3qMUYD6u0g4wS6Y_JDXAY2aR=iECfEkTTobT1AOn8CiByRQ@mail.gmail.com> (raw)
In-Reply-To: <CAFiYyc2c3yEAs+hyqganu-4v6wzLeRDRcB0wbiWqVUikwFSsoA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 11485 bytes --]
Ughhh, my bad. I had reworked this as soon as Jakub said we couldn't
cache the min/max in TYPE_MIN/MAX_VALUE, but forgot to send it. And
yes...the incessant wrapping was very annoying. It's all fixed.
Let me know what you think.
Aldy
On Fri, Sep 23, 2022 at 9:04 AM Richard Biener
<richard.guenther@gmail.com> wrote:
>
> On Thu, Sep 22, 2022 at 6:49 PM Aldy Hernandez <aldyh@redhat.com> wrote:
> >
> > Similarly to how we drop NANs to UNDEFINED when -ffinite-math-only, I
> > think we can drop the numbers outside of the min/max representable
> > numbers to the representable number.
> >
> > This means the endpoings to VR_VARYING for -ffinite-math-only can now
> > be the min/max representable, instead of -INF and +INF.
> >
> > Saturating in the setter means that the upcoming implementation for
> > binary operators no longer have to worry about doing the right
> > thing for -ffinite-math-only. If the range goes outside the limits,
> > it'll get chopped down.
> >
> > How does this look?
> >
> > Tested on x86-64 Linux.
> >
> > gcc/ChangeLog:
> >
> > * range-op-float.cc (build_le): Use vrp_val_*.
> > (build_lt): Same.
> > (build_ge): Same.
> > (build_gt): Same.
> > * value-range.cc (frange::set): Chop ranges outside of the
> > representable numbers for -ffinite-math-only.
> > (frange::normalize_kind): Use vrp_val*.
> > (frange::verify_range): Same.
> > (frange::set_nonnegative): Same.
> > (range_tests_floats): Remove tests that depend on -INF and +INF.
> > * value-range.h (real_max_representable): Add prototype.
> > (real_min_representable): Same.
> > (vrp_val_max): Set max representable number for
> > -ffinite-math-only.
> > (vrp_val_min): Same but for min.
> > (frange::set_varying): Use vrp_val*.
> > ---
> > gcc/range-op-float.cc | 12 +++++++----
> > gcc/value-range.cc | 46 ++++++++++++++++++++-----------------------
> > gcc/value-range.h | 30 ++++++++++++++++++++++------
> > 3 files changed, 53 insertions(+), 35 deletions(-)
> >
> > diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
> > index 2bd3dc9253f..15ba19c2deb 100644
> > --- a/gcc/range-op-float.cc
> > +++ b/gcc/range-op-float.cc
> > @@ -232,7 +232,8 @@ build_le (frange &r, tree type, const frange &val)
> > {
> > gcc_checking_assert (!val.known_isnan ());
> >
> > - r.set (type, dconstninf, val.upper_bound ());
> > + REAL_VALUE_TYPE ninf = *TREE_REAL_CST_PTR (vrp_val_min (type));
> > + r.set (type, ninf, val.upper_bound ());
> >
> > // Add both zeros if there's the possibility of zero equality.
> > frange_add_zeros (r, type);
> > @@ -257,7 +258,8 @@ build_lt (frange &r, tree type, const frange &val)
> > return false;
> > }
> > // We only support closed intervals.
> > - r.set (type, dconstninf, val.upper_bound ());
> > + REAL_VALUE_TYPE ninf = *TREE_REAL_CST_PTR (vrp_val_min (type));
> > + r.set (type, ninf, val.upper_bound ());
> > return true;
> > }
> >
> > @@ -268,7 +270,8 @@ build_ge (frange &r, tree type, const frange &val)
> > {
> > gcc_checking_assert (!val.known_isnan ());
> >
> > - r.set (type, val.lower_bound (), dconstinf);
> > + REAL_VALUE_TYPE inf = *TREE_REAL_CST_PTR (vrp_val_max (type));
> > + r.set (type, val.lower_bound (), inf);
> >
> > // Add both zeros if there's the possibility of zero equality.
> > frange_add_zeros (r, type);
> > @@ -294,7 +297,8 @@ build_gt (frange &r, tree type, const frange &val)
> > }
> >
> > // We only support closed intervals.
> > - r.set (type, val.lower_bound (), dconstinf);
> > + REAL_VALUE_TYPE inf = *TREE_REAL_CST_PTR (vrp_val_max (type));
> > + r.set (type, val.lower_bound (), inf);
> > return true;
> > }
> >
> > diff --git a/gcc/value-range.cc b/gcc/value-range.cc
> > index 7e8028eced2..e57d60e1bac 100644
> > --- a/gcc/value-range.cc
> > +++ b/gcc/value-range.cc
> > @@ -338,6 +338,18 @@ frange::set (tree min, tree max, value_range_kind kind)
> > m_neg_nan = false;
> > }
> >
> > + // For -ffinite-math-only we can drop ranges outside the
> > + // representable numbers to min/max for the type.
> > + if (flag_finite_math_only)
> > + {
> > + REAL_VALUE_TYPE min_repr = *TREE_REAL_CST_PTR (vrp_val_min (m_type));
> > + REAL_VALUE_TYPE max_repr = *TREE_REAL_CST_PTR (vrp_val_max (m_type));
> > + if (real_less (&m_min, &min_repr))
> > + m_min = min_repr;
> > + if (real_less (&max_repr, &m_max))
> > + m_max = max_repr;
>
> I think you want to re-formulate that in terms of real_isinf() and
> change those to the max representable values.
>
> > + }
> > +
> > // Check for swapped ranges.
> > gcc_checking_assert (tree_compare (LE_EXPR, min, max));
> >
> > @@ -371,8 +383,8 @@ bool
> > frange::normalize_kind ()
> > {
> > if (m_kind == VR_RANGE
> > - && real_isinf (&m_min, 1)
> > - && real_isinf (&m_max, 0))
> > + && vrp_val_is_min (build_real (m_type, m_min))
> > + && vrp_val_is_max (build_real (m_type, m_max)))
>
> I think this suggests that keeping +-Inf might be the better choice.
> At least you want to change vrp_val_is_min/max to take a REAL_VALUE_TYPE
> to avoid building four tree nodes for just this compare?
>
> > {
> > if (m_pos_nan && m_neg_nan)
> > {
> > @@ -385,8 +397,8 @@ frange::normalize_kind ()
> > if (!m_pos_nan || !m_neg_nan)
> > {
> > m_kind = VR_RANGE;
> > - m_min = dconstninf;
> > - m_max = dconstinf;
> > + m_min = *TREE_REAL_CST_PTR (vrp_val_min (m_type));
> > + m_max = *TREE_REAL_CST_PTR (vrp_val_max (m_type));
> > return true;
> > }
> > }
> > @@ -706,8 +718,8 @@ frange::verify_range ()
> > case VR_VARYING:
> > gcc_checking_assert (m_type);
> > gcc_checking_assert (m_pos_nan && m_neg_nan);
> > - gcc_checking_assert (real_isinf (&m_min, 1));
> > - gcc_checking_assert (real_isinf (&m_max, 0));
> > + gcc_checking_assert (vrp_val_is_min (build_real (m_type, m_min)));
> > + gcc_checking_assert (vrp_val_is_max (build_real (m_type, m_max)));
> > return;
> > case VR_RANGE:
> > gcc_checking_assert (m_type);
> > @@ -732,7 +744,8 @@ frange::verify_range ()
> > // If all the properties are clear, we better not span the entire
> > // domain, because that would make us varying.
> > if (m_pos_nan && m_neg_nan)
> > - gcc_checking_assert (!real_isinf (&m_min, 1) || !real_isinf (&m_max, 0));
> > + gcc_checking_assert (!vrp_val_is_min (build_real (m_type, m_min))
> > + || !vrp_val_is_max (build_real (m_type, m_max)));
> > }
> >
> > // We can't do much with nonzeros yet.
> > @@ -779,7 +792,7 @@ frange::zero_p () const
> > void
> > frange::set_nonnegative (tree type)
> > {
> > - set (type, dconst0, dconstinf);
> > + set (type, dconst0, *TREE_REAL_CST_PTR (vrp_val_max (type)));
> >
> > // Set +NAN as the only possibility.
> > if (HONOR_NANS (type))
> > @@ -3886,23 +3899,6 @@ range_tests_floats ()
> > r0.clear_nan ();
> > ASSERT_FALSE (r0.varying_p ());
> >
> > - // The endpoints of a VARYING are +-INF.
> > - r0.set_varying (float_type_node);
> > - ASSERT_TRUE (real_identical (&r0.lower_bound (), &dconstninf));
> > - ASSERT_TRUE (real_identical (&r0.upper_bound (), &dconstinf));
> > -
> > - // The maximum representable range for a type is still a subset of VARYING.
> > - REAL_VALUE_TYPE q, r;
> > - real_min_representable (&q, float_type_node);
> > - real_max_representable (&r, float_type_node);
> > - r0 = frange (float_type_node, q, r);
> > - // r0 is not a varying, because it does not include -INF/+INF.
> > - ASSERT_FALSE (r0.varying_p ());
> > - // The upper bound of r0 must be less than +INF.
> > - ASSERT_TRUE (real_less (&r0.upper_bound (), &dconstinf));
> > - // The lower bound of r0 must be greater than -INF.
> > - ASSERT_TRUE (real_less (&dconstninf, &r0.lower_bound ()));
> > -
> > // For most architectures, where float and double are different
> > // sizes, having the same endpoints does not necessarily mean the
> > // ranges are equal.
> > diff --git a/gcc/value-range.h b/gcc/value-range.h
> > index 3668b331187..74879b76b40 100644
> > --- a/gcc/value-range.h
> > +++ b/gcc/value-range.h
> > @@ -593,6 +593,8 @@ extern void dump_value_range (FILE *, const vrange *);
> > extern bool vrp_val_is_min (const_tree);
> > extern bool vrp_val_is_max (const_tree);
> > extern bool vrp_operand_equal_p (const_tree, const_tree);
> > +inline void real_max_representable (REAL_VALUE_TYPE *r, const_tree type);
> > +inline void real_min_representable (REAL_VALUE_TYPE *r, const_tree type);
> >
> > inline value_range_kind
> > vrange::kind () const
> > @@ -1009,7 +1011,15 @@ vrp_val_max (const_tree type)
> > return wide_int_to_tree (const_cast<tree> (type), max);
> > }
> > if (frange::supports_p (type))
> > - return build_real (const_cast <tree> (type), dconstinf);
> > + {
> > + if (flag_finite_math_only)
> > + {
> > + REAL_VALUE_TYPE r;
> > + real_max_representable (&r, type);
> > + return build_real (const_cast <tree> (type), r);
> > + }
> > + return build_real (const_cast <tree> (type), dconstinf);
>
> Overall there's too many places affected IMHO. The above also shows
> we're building trees a lot - note that REAL_CST are _not_ shared, so
> each time you call build_real a new REAL_CST tree node is allocated
> (and later GCed if no longer used).
>
> I thought vrp_val_min/max are legacy by now ...
>
> That said, using trees for the range representation might not be the
> very best thing to do, it's unnecessarily wrapping things.
>
> > + }
> > return NULL_TREE;
> > }
> >
> > @@ -1023,7 +1033,15 @@ vrp_val_min (const_tree type)
> > if (POINTER_TYPE_P (type))
> > return build_zero_cst (const_cast<tree> (type));
> > if (frange::supports_p (type))
> > - return build_real (const_cast <tree> (type), dconstninf);
> > + {
> > + if (flag_finite_math_only)
> > + {
> > + REAL_VALUE_TYPE r;
> > + real_min_representable (&r, type);
> > + return build_real (const_cast <tree> (type), r);
> > + }
> > + return build_real (const_cast <tree> (type), dconstninf);
> > + }
> > return NULL_TREE;
> > }
> >
> > @@ -1073,8 +1091,8 @@ frange::set_varying (tree type)
> > {
> > m_kind = VR_VARYING;
> > m_type = type;
> > - m_min = dconstninf;
> > - m_max = dconstinf;
> > + m_min = *TREE_REAL_CST_PTR (vrp_val_min (type));
> > + m_max = *TREE_REAL_CST_PTR (vrp_val_max (type));
> > m_pos_nan = true;
> > m_neg_nan = true;
> > }
> > @@ -1133,7 +1151,7 @@ frange::clear_nan ()
> > // Set R to maximum representable value for TYPE.
> >
> > inline void
> > -real_max_representable (REAL_VALUE_TYPE *r, tree type)
> > +real_max_representable (REAL_VALUE_TYPE *r, const_tree type)
> > {
> > char buf[128];
> > get_max_float (REAL_MODE_FORMAT (TYPE_MODE (type)),
> > @@ -1145,7 +1163,7 @@ real_max_representable (REAL_VALUE_TYPE *r, tree type)
> > // Set R to minimum representable value for TYPE.
> >
> > inline void
> > -real_min_representable (REAL_VALUE_TYPE *r, tree type)
> > +real_min_representable (REAL_VALUE_TYPE *r, const_tree type)
> > {
> > real_max_representable (r, type);
> > *r = real_value_negate (r);
> > --
> > 2.37.1
> >
>
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From ed143e0c8e08b9192439ff4b7892a91ffa9bfd12 Mon Sep 17 00:00:00 2001
From: Aldy Hernandez <aldyh@redhat.com>
Date: Thu, 22 Sep 2022 18:20:39 +0200
Subject: [PATCH] frange: drop endpoints to min/max representable numbers for
-ffinite-math-only.
Similarly to how we drop NANs to UNDEFINED when -ffinite-math-only, I
think we can drop the numbers outside of the min/max representable
numbers to the representable number.
This means the endpoings to VR_VARYING for -ffinite-math-only can now
be the min/max representable, instead of -INF and +INF.
Saturating in the setter means that the upcoming implementation for
binary operators no longer have to worry about doing the right
thing for -ffinite-math-only. If the range goes outside the limits,
it'll get chopped down.
Tested on x86-64 Linux.
gcc/ChangeLog:
* range-op-float.cc (build_le): Use vrp_val_*.
(build_lt): Same.
(build_ge): Same.
(build_gt): Same.
* value-range.cc (frange::set): Chop ranges outside of the
representable numbers for -ffinite-math-only.
(frange::normalize_kind): Use vrp_val*.
(frange::verify_range): Same.
(frange::set_nonnegative): Same.
(range_tests_floats): Remove tests that depend on -INF and +INF.
* value-range.h (real_max_representable): Add prototype.
(real_min_representable): Same.
(vrp_val_max): Set max representable number for
-ffinite-math-only.
(vrp_val_min): Same but for min.
(frange::set_varying): Use vrp_val*.
---
gcc/range-op-float.cc | 18 ++++++-----
gcc/value-range.cc | 46 ++++++++++++--------------
gcc/value-range.h | 75 ++++++++++++++++++++++++++++++++++++-------
3 files changed, 94 insertions(+), 45 deletions(-)
diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
index 2bd3dc9253f..84f1ebe5a61 100644
--- a/gcc/range-op-float.cc
+++ b/gcc/range-op-float.cc
@@ -190,8 +190,7 @@ frelop_early_resolve (irange &r, tree type,
static inline void
frange_drop_inf (frange &r, tree type)
{
- REAL_VALUE_TYPE max;
- real_max_representable (&max, type);
+ REAL_VALUE_TYPE max = real_max_representable (type);
frange tmp (type, r.lower_bound (), max);
r.intersect (tmp);
}
@@ -202,8 +201,7 @@ frange_drop_inf (frange &r, tree type)
static inline void
frange_drop_ninf (frange &r, tree type)
{
- REAL_VALUE_TYPE min;
- real_min_representable (&min, type);
+ REAL_VALUE_TYPE min = real_min_representable (type);
frange tmp (type, min, r.upper_bound ());
r.intersect (tmp);
}
@@ -232,7 +230,8 @@ build_le (frange &r, tree type, const frange &val)
{
gcc_checking_assert (!val.known_isnan ());
- r.set (type, dconstninf, val.upper_bound ());
+ REAL_VALUE_TYPE ninf = frange_val_min (type);
+ r.set (type, ninf, val.upper_bound ());
// Add both zeros if there's the possibility of zero equality.
frange_add_zeros (r, type);
@@ -257,7 +256,8 @@ build_lt (frange &r, tree type, const frange &val)
return false;
}
// We only support closed intervals.
- r.set (type, dconstninf, val.upper_bound ());
+ REAL_VALUE_TYPE ninf = frange_val_min (type);
+ r.set (type, ninf, val.upper_bound ());
return true;
}
@@ -268,7 +268,8 @@ build_ge (frange &r, tree type, const frange &val)
{
gcc_checking_assert (!val.known_isnan ());
- r.set (type, val.lower_bound (), dconstinf);
+ REAL_VALUE_TYPE inf = frange_val_max (type);
+ r.set (type, val.lower_bound (), inf);
// Add both zeros if there's the possibility of zero equality.
frange_add_zeros (r, type);
@@ -294,7 +295,8 @@ build_gt (frange &r, tree type, const frange &val)
}
// We only support closed intervals.
- r.set (type, val.lower_bound (), dconstinf);
+ REAL_VALUE_TYPE inf = frange_val_max (type);
+ r.set (type, val.lower_bound (), inf);
return true;
}
diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index 7e8028eced2..43905ba4901 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -338,6 +338,18 @@ frange::set (tree min, tree max, value_range_kind kind)
m_neg_nan = false;
}
+ // For -ffinite-math-only we can drop ranges outside the
+ // representable numbers to min/max for the type.
+ if (flag_finite_math_only)
+ {
+ REAL_VALUE_TYPE min_repr = frange_val_min (m_type);
+ REAL_VALUE_TYPE max_repr = frange_val_max (m_type);
+ if (real_less (&m_min, &min_repr))
+ m_min = min_repr;
+ if (real_less (&max_repr, &m_max))
+ m_max = max_repr;
+ }
+
// Check for swapped ranges.
gcc_checking_assert (tree_compare (LE_EXPR, min, max));
@@ -371,8 +383,8 @@ bool
frange::normalize_kind ()
{
if (m_kind == VR_RANGE
- && real_isinf (&m_min, 1)
- && real_isinf (&m_max, 0))
+ && frange_val_is_min (m_min, m_type)
+ && frange_val_is_max (m_max, m_type))
{
if (m_pos_nan && m_neg_nan)
{
@@ -385,8 +397,8 @@ frange::normalize_kind ()
if (!m_pos_nan || !m_neg_nan)
{
m_kind = VR_RANGE;
- m_min = dconstninf;
- m_max = dconstinf;
+ m_min = frange_val_min (m_type);
+ m_max = frange_val_max (m_type);
return true;
}
}
@@ -706,8 +718,8 @@ frange::verify_range ()
case VR_VARYING:
gcc_checking_assert (m_type);
gcc_checking_assert (m_pos_nan && m_neg_nan);
- gcc_checking_assert (real_isinf (&m_min, 1));
- gcc_checking_assert (real_isinf (&m_max, 0));
+ gcc_checking_assert (frange_val_is_min (m_min, m_type));
+ gcc_checking_assert (frange_val_is_max (m_max, m_type));
return;
case VR_RANGE:
gcc_checking_assert (m_type);
@@ -732,7 +744,8 @@ frange::verify_range ()
// If all the properties are clear, we better not span the entire
// domain, because that would make us varying.
if (m_pos_nan && m_neg_nan)
- gcc_checking_assert (!real_isinf (&m_min, 1) || !real_isinf (&m_max, 0));
+ gcc_checking_assert (!frange_val_is_min (m_min, m_type)
+ || !frange_val_is_max (m_max, m_type));
}
// We can't do much with nonzeros yet.
@@ -779,7 +792,7 @@ frange::zero_p () const
void
frange::set_nonnegative (tree type)
{
- set (type, dconst0, dconstinf);
+ set (type, dconst0, frange_val_max (type));
// Set +NAN as the only possibility.
if (HONOR_NANS (type))
@@ -3886,23 +3899,6 @@ range_tests_floats ()
r0.clear_nan ();
ASSERT_FALSE (r0.varying_p ());
- // The endpoints of a VARYING are +-INF.
- r0.set_varying (float_type_node);
- ASSERT_TRUE (real_identical (&r0.lower_bound (), &dconstninf));
- ASSERT_TRUE (real_identical (&r0.upper_bound (), &dconstinf));
-
- // The maximum representable range for a type is still a subset of VARYING.
- REAL_VALUE_TYPE q, r;
- real_min_representable (&q, float_type_node);
- real_max_representable (&r, float_type_node);
- r0 = frange (float_type_node, q, r);
- // r0 is not a varying, because it does not include -INF/+INF.
- ASSERT_FALSE (r0.varying_p ());
- // The upper bound of r0 must be less than +INF.
- ASSERT_TRUE (real_less (&r0.upper_bound (), &dconstinf));
- // The lower bound of r0 must be greater than -INF.
- ASSERT_TRUE (real_less (&dconstninf, &r0.lower_bound ()));
-
// For most architectures, where float and double are different
// sizes, having the same endpoints does not necessarily mean the
// ranges are equal.
diff --git a/gcc/value-range.h b/gcc/value-range.h
index 3668b331187..413e54bda6f 100644
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -593,6 +593,8 @@ extern void dump_value_range (FILE *, const vrange *);
extern bool vrp_val_is_min (const_tree);
extern bool vrp_val_is_max (const_tree);
extern bool vrp_operand_equal_p (const_tree, const_tree);
+inline REAL_VALUE_TYPE frange_val_min (const_tree type);
+inline REAL_VALUE_TYPE frange_val_max (const_tree type);
inline value_range_kind
vrange::kind () const
@@ -1009,7 +1011,10 @@ vrp_val_max (const_tree type)
return wide_int_to_tree (const_cast<tree> (type), max);
}
if (frange::supports_p (type))
- return build_real (const_cast <tree> (type), dconstinf);
+ {
+ REAL_VALUE_TYPE r = frange_val_max (type);
+ return build_real (const_cast <tree> (type), r);
+ }
return NULL_TREE;
}
@@ -1023,7 +1028,10 @@ vrp_val_min (const_tree type)
if (POINTER_TYPE_P (type))
return build_zero_cst (const_cast<tree> (type));
if (frange::supports_p (type))
- return build_real (const_cast <tree> (type), dconstninf);
+ {
+ REAL_VALUE_TYPE r = frange_val_min (type);
+ return build_real (const_cast <tree> (type), r);
+ }
return NULL_TREE;
}
@@ -1073,8 +1081,8 @@ frange::set_varying (tree type)
{
m_kind = VR_VARYING;
m_type = type;
- m_min = dconstninf;
- m_max = dconstinf;
+ m_min = frange_val_min (type);
+ m_max = frange_val_max (type);
m_pos_nan = true;
m_neg_nan = true;
}
@@ -1132,23 +1140,66 @@ frange::clear_nan ()
// Set R to maximum representable value for TYPE.
-inline void
-real_max_representable (REAL_VALUE_TYPE *r, tree type)
+inline REAL_VALUE_TYPE
+real_max_representable (const_tree type)
{
+ REAL_VALUE_TYPE r;
char buf[128];
get_max_float (REAL_MODE_FORMAT (TYPE_MODE (type)),
buf, sizeof (buf), false);
- int res = real_from_string (r, buf);
+ int res = real_from_string (&r, buf);
gcc_checking_assert (!res);
+ return r;
}
-// Set R to minimum representable value for TYPE.
+// Return the minimum representable value for TYPE.
-inline void
-real_min_representable (REAL_VALUE_TYPE *r, tree type)
+inline REAL_VALUE_TYPE
+real_min_representable (const_tree type)
+{
+ REAL_VALUE_TYPE r = real_max_representable (type);
+ r = real_value_negate (&r);
+ return r;
+}
+
+// Return the minimum value for TYPE.
+
+inline REAL_VALUE_TYPE
+frange_val_min (const_tree type)
+{
+ if (flag_finite_math_only)
+ return real_min_representable (type);
+ else
+ return dconstninf;
+}
+
+// Return the maximum value for TYPE.
+
+inline REAL_VALUE_TYPE
+frange_val_max (const_tree type)
+{
+ if (flag_finite_math_only)
+ return real_max_representable (type);
+ else
+ return dconstinf;
+}
+
+// Return TRUE if R is the minimum value for TYPE.
+
+inline bool
+frange_val_is_min (const REAL_VALUE_TYPE &r, const_tree type)
+{
+ REAL_VALUE_TYPE min = frange_val_min (type);
+ return real_identical (&min, &r);
+}
+
+// Return TRUE if R is the max value for TYPE.
+
+inline bool
+frange_val_is_max (const REAL_VALUE_TYPE &r, const_tree type)
{
- real_max_representable (r, type);
- *r = real_value_negate (r);
+ REAL_VALUE_TYPE max = frange_val_max (type);
+ return real_identical (&max, &r);
}
// Build a signless NAN of type TYPE.
--
2.37.1
next prev parent reply other threads:[~2022-09-23 7:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 16:49 [PATCH] frange: dump hex values when dumping FP numbers Aldy Hernandez
2022-09-22 16:49 ` [PATCH] frange: drop endpoints to min/max representable numbers for -ffinite-math-only Aldy Hernandez
2022-09-23 7:03 ` Richard Biener
2022-09-23 7:21 ` Aldy Hernandez [this message]
2022-09-23 7:51 ` Richard Biener
2022-09-22 19:23 ` [PATCH] frange: dump hex values when dumping FP numbers Toon Moene
2022-09-22 19:25 ` Jeff Law
2022-09-22 21:04 ` Jakub Jelinek
2022-09-23 6:56 ` Aldy Hernandez
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