From: Daniel Cederman <cederman@gaisler.com>
To: libc-alpha@sourceware.org
Cc: daniel@gaisler.com, andreas@gaisler.com
Subject: [PATCH] sparc: Force calculation that raises exception
Date: Fri, 12 Jan 2024 10:26:25 +0100 [thread overview]
Message-ID: <20240112092628.2464455-3-cederman@gaisler.com> (raw)
In-Reply-To: <20240112092628.2464455-1-cederman@gaisler.com>
Read out the FPU control word to force the calculation to complete and
raise the exception.
With this change the math/test-fenv test pass for LEON.
Signed-off-by: Daniel Cederman <cederman@gaisler.com>
---
sysdeps/sparc/fpu/fraiseexcpt.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/sysdeps/sparc/fpu/fraiseexcpt.c b/sysdeps/sparc/fpu/fraiseexcpt.c
index 26a7720ec9..43176cf6a3 100644
--- a/sysdeps/sparc/fpu/fraiseexcpt.c
+++ b/sysdeps/sparc/fpu/fraiseexcpt.c
@@ -20,6 +20,7 @@
#include <float.h>
#include <math.h>
#include <shlib-compat.h>
+#include <fpu_control.h>
int
__feraiseexcept (int excepts)
@@ -30,6 +31,7 @@ __feraiseexcept (int excepts)
0.0, 1.0, DBL_MAX, DBL_MIN, M_PI
};
double d;
+ fpu_control_t cw;
/* Raise exceptions represented by EXPECTS. But we must raise only
one signal at a time. It is important the if the overflow/underflow
@@ -43,6 +45,7 @@ __feraiseexcept (int excepts)
__asm ("" : "=e" (d) : "0" (c.zero));
d /= c.zero;
__asm __volatile ("" : : "e" (d));
+ _FPU_GETCW(cw);
}
/* Next: division by zero. */
@@ -51,6 +54,7 @@ __feraiseexcept (int excepts)
__asm ("" : "=e" (d) : "0" (c.one));
d /= c.zero;
__asm __volatile ("" : : "e" (d));
+ _FPU_GETCW(cw);
}
/* Next: overflow. */
@@ -59,6 +63,7 @@ __feraiseexcept (int excepts)
__asm ("" : "=e" (d) : "0" (c.max));
d *= d;
__asm __volatile ("" : : "e" (d));
+ _FPU_GETCW(cw);
}
/* Next: underflow. */
@@ -67,6 +72,7 @@ __feraiseexcept (int excepts)
__asm ("" : "=e" (d) : "0" (c.min));
d *= d;
__asm __volatile ("" : : "e" (d));
+ _FPU_GETCW(cw);
}
/* Last: inexact. */
@@ -75,6 +81,7 @@ __feraiseexcept (int excepts)
__asm ("" : "=e" (d) : "0" (c.one));
d /= c.pi;
__asm __volatile ("" : : "e" (d));
+ _FPU_GETCW(cw);
}
/* Success. */
--
2.40.1
next prev parent reply other threads:[~2024-01-12 9:26 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-12 9:26 [PATCH] sparc: Do not test preservation of NaN payloads for LEON Daniel Cederman
2024-01-12 9:26 ` [PATCH] sparc: Prevent stfsr from directly following floating-point instruction Daniel Cederman
2024-01-12 14:38 ` Adhemerval Zanella Netto
2024-01-15 9:37 ` Daniel Cederman
2024-01-12 9:26 ` Daniel Cederman [this message]
2024-01-12 16:45 ` [PATCH] sparc: Force calculation that raises exception Adhemerval Zanella Netto
2024-01-15 9:41 ` Daniel Cederman
2024-01-15 11:47 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Treat the version field in the FPU control word as reserved Daniel Cederman
2024-01-12 17:42 ` Adhemerval Zanella Netto
2024-02-15 9:31 ` Daniel Cederman
2024-02-19 14:55 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Fix llrint and llround missing exceptions on SPARC32 Daniel Cederman
2024-01-12 18:05 ` Adhemerval Zanella Netto
2024-01-15 14:38 ` Daniel Cederman
2024-01-15 17:52 ` Adhemerval Zanella Netto
2024-01-12 9:26 ` [PATCH] sparc: Remove unwind information from signal return stub functions Daniel Cederman
2024-01-15 13:41 ` Adhemerval Zanella Netto
2024-01-15 14:22 ` Daniel Cederman
2024-01-15 16:57 ` Adhemerval Zanella Netto
2024-01-16 15:37 ` [PATCH] sparc: Do not test preservation of NaN payloads for LEON Adhemerval Zanella Netto
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240112092628.2464455-3-cederman@gaisler.com \
--to=cederman@gaisler.com \
--cc=andreas@gaisler.com \
--cc=daniel@gaisler.com \
--cc=libc-alpha@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).