From: tholo <tholo@openbsd.org>
Date: Sat, 8 Feb 1997 23:36:58 +0000 (+0000)
Subject: Provide more information on FP exceptions
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=472b715eebaa4ff45fed1b5c4cae4168b134719f;p=openbsd

Provide more information on FP exceptions
---

diff --git a/sys/arch/i386/isa/npx.c b/sys/arch/i386/isa/npx.c
index 683332aeb9a..37d8d28a0ee 100644
--- a/sys/arch/i386/isa/npx.c
+++ b/sys/arch/i386/isa/npx.c
@@ -1,3 +1,4 @@
+/*	$OpenBSD: npx.c,v 1.13 1997/02/08 23:36:58 tholo Exp $	*/
 /*	$NetBSD: npx.c,v 1.57 1996/05/12 23:12:24 mycroft Exp $	*/
 
 #if 0
@@ -439,16 +440,28 @@ npxintr(arg)
 		 * just before it is used).
 		 */
 		p->p_md.md_regs = (struct trapframe *)&frame->if_es;
-#ifdef notyet
+
 		/*
 		 * Encode the appropriate code for detailed information on
 		 * this exception.
 		 */
-		code = XXX_ENCODE(addr->sv_ex_sw);
-#else
-		code = 0;	/* XXX */
+		if (addr->sv_ex_sw & EN_SW_IE)
+			code = FPE_FLTINV;
+#ifdef notyet
+		else if (addr->sv_ex_sw & EN_SW_DE)
+			code = FPE_FLTDEN;
 #endif
-		trapsignal(p, SIGFPE, code, 0, 0);	/* XXX type? */
+		else if (addr->sv_ex_sw & EN_SW_ZE)
+			code = FPE_FLTDIV;
+		else if (addr->sv_ex_sw & EN_SW_OE)
+			code = FPE_FLTOVF;
+		else if (addr->sv_ex_sw & EN_SW_UE)
+			code = FPE_FLTUND;
+		else if (addr->sv_ex_sw & EN_SW_PE)
+			code = FPE_FLTRES;
+		else
+			code = 0;		/* XXX unknown */
+		trapsignal(p, SIGFPE, T_ARITHTRAP, code, frame->if_eip);
 	} else {
 		/*
 		 * Nested interrupt.  These losers occur when: