diff mbox series

[PUSHED] doc, c: Clarify status of decimal floating point support [PR123234]

Message ID 20260403231021.633581-1-sloosemore@baylibre.com
State Committed
Commit 831c9cedac94daf620dd6910085ad94106940efe
Headers
Series [PUSHED] doc, c: Clarify status of decimal floating point support [PR123234] |

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Commit Message

Sandra Loosemore April 3, 2026, 11:10 p.m. UTC 
  At first glance, the GCC manual's section documenting decimal floating
point support as a C extension appears to be bit-rotten, since this
feature is now standardized in ISO C23.  In fact, though, GCC's
implementation is based on the older N1312 proposal, and full C23
support is not yet available.  This patch makes the GCC manual say that
explicitly.

gcc/ChangeLog
	PR c/123234
	* doc/extend.texi (Decimal Float): Clarify that GCC really does
	support only the older N1312 draft as documented here, not the
	standard C23 functionality yet.
---
 gcc/doc/extend.texi | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 47b0bdf1340..b9d8b8955a9 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -410,11 +410,12 @@  FPU.
 @cindex @code{DD} integer suffix
 @cindex @code{DL} integer suffix
 
-As an extension, GNU C supports decimal floating types as
-defined in the N1312 draft of ISO/IEC WDTR24732.  Support for decimal
-floating types in GCC will evolve as the draft technical report changes.
-Calling conventions for any target might also change.  Not all targets
-support decimal floating types.
+As an extension, GNU C supports decimal floating types as defined in
+the N1312 draft of ISO/IEC WDTR24732.  GCC does not yet implement the
+later specification of decimal floating point in the C23 standard,
+primarily due to problems with library support.  The N1312 draft
+support is available in all dialects of C, but not all targets support
+decimal floating types.
 
 The decimal floating types are @code{_Decimal32}, @code{_Decimal64}, and
 @code{_Decimal128}.  They use a radix of ten, unlike the floating types