From: Stafford Horne <shorne@gmail.com>
Date: Thu, 21 Oct 2021 13:11:27 +0000 (+0900)
Subject: or1k: Update FPU to specify detect tininess before rounding
X-Git-Tag: basepoints/gcc-13~3682
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa41680e481456917824e3794c526521b9520589;p=thirdparty%2Fgcc.git

or1k: Update FPU to specify detect tininess before rounding

This was not defined in the spec and not consistent in the
implementation causing incosistent behavior.  After review we have
updated the CPU implementations and proposed the spec be updated to
specific that FPU tininess checks check for tininess before roudning.

Architecture change draft:

	https://openrisc.io/proposals/p18-fpu-tininess

libgcc/ChangeLog:

	* config/or1k/sfp-machine.h (_FP_TININESS_AFTER_ROUNDING):
	Change to 0.
---

diff --git a/libgcc/config/or1k/sfp-machine.h b/libgcc/config/or1k/sfp-machine.h
index eebe5b0578ed..162c6bc53262 100644
--- a/libgcc/config/or1k/sfp-machine.h
+++ b/libgcc/config/or1k/sfp-machine.h
@@ -85,7 +85,7 @@ do {								\
 
 #define __BYTE_ORDER __BIG_ENDIAN
 
-#define _FP_TININESS_AFTER_ROUNDING 1
+#define _FP_TININESS_AFTER_ROUNDING 0
 
 /* Define ALIASNAME as a strong alias for NAME.  */
 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)