[gcc r13-2229] Add real_iszero to real.*
Aldy Hernandez
aldyh@gcc.gnu.org
Fri Aug 26 18:45:57 GMT 2022
https://gcc.gnu.org/g:1d3145360f95910f0661da0364b91dc7962d44fa
commit r13-2229-g1d3145360f95910f0661da0364b91dc7962d44fa
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Fri Aug 26 16:57:09 2022 +0200
Add real_iszero to real.*
We have real_isnegzero but no real_iszero. We could memcmp with 0,
but that's just ugly.
gcc/ChangeLog:
* real.cc (real_iszero): New.
* real.h (real_iszero): New.
Diff:
---
gcc/real.cc | 16 ++++++++++++++++
gcc/real.h | 6 ++++++
2 files changed, 22 insertions(+)
diff --git a/gcc/real.cc b/gcc/real.cc
index dcf41b79f60..96f05ec68ca 100644
--- a/gcc/real.cc
+++ b/gcc/real.cc
@@ -1272,6 +1272,22 @@ real_isneg (const REAL_VALUE_TYPE *r)
return r->sign;
}
+/* Determine whether a floating-point value X is plus or minus zero. */
+
+bool
+real_iszero (const REAL_VALUE_TYPE *r)
+{
+ return r->cl == rvc_zero;
+}
+
+/* Determine whether a floating-point value X is zero with SIGN. */
+
+bool
+real_iszero (const REAL_VALUE_TYPE *r, bool sign)
+{
+ return real_iszero (r) && r->sign == sign;
+}
+
/* Determine whether a floating-point value X is minus zero. */
bool
diff --git a/gcc/real.h b/gcc/real.h
index e01f9ed7282..ec78e8a8932 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -295,6 +295,12 @@ extern bool real_isneg (const REAL_VALUE_TYPE *);
/* Determine whether a floating-point value X is minus zero. */
extern bool real_isnegzero (const REAL_VALUE_TYPE *);
+/* Determine whether a floating-point value X is plus or minus zero. */
+extern bool real_iszero (const REAL_VALUE_TYPE *);
+
+/* Determine whether a floating-point value X is zero with SIGN. */
+extern bool real_iszero (const REAL_VALUE_TYPE *, bool sign);
+
/* Test relationships between reals. */
extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
extern bool real_equal (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
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