[src/trunk]: src/sys/arch/sparc64/sparc64 New fpu handling code.

[eeh <eeh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7cf9ac309648
branches:  trunk
changeset: 512090:7cf9ac309648
user:      eeh <eeh%NetBSD.org@localhost>
date:      Thu Jul 05 06:34:56 2001 +0000

description:
New fpu handling code.

diffstat:

 sys/arch/sparc64/sparc64/trap.c |  33 ++++++++++++++++++++-------------
 1 files changed, 20 insertions(+), 13 deletions(-)

diffs (58 lines):

diff -r 4962f80a8eee -r 7cf9ac309648 sys/arch/sparc64/sparc64/trap.c
--- a/sys/arch/sparc64/sparc64/trap.c   Thu Jul 05 06:29:49 2001 +0000
+++ b/sys/arch/sparc64/sparc64/trap.c   Thu Jul 05 06:34:56 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: trap.c,v 1.68 2001/06/21 00:10:49 eeh Exp $ */
+/*     $NetBSD: trap.c,v 1.69 2001/07/05 06:34:56 eeh Exp $ */
 
 /*
  * Copyright (c) 1996
@@ -584,6 +584,7 @@
                 * the FPU.
                 */
                if (type == T_FPDISABLED) {
+extern void db_printf(const char * , ...);
 #ifndef NEW_FPSTATE
                        if (fpproc != NULL) {   /* someone else had it */
                                savefpstate(fpproc->p_md.md_fpstate);
@@ -594,22 +595,28 @@
                        tf->tf_tstate |= (PSTATE_PEF<<TSTATE_PSTATE_SHIFT);
                        return;
 #else
+                       struct proc *newfpproc;
+
                        /* New scheme */
-                       if (fpproc != NULL) {   /* someone else had it, maybe? */
-                               savefpstate(fpproc->p_md.md_fpstate);
-                               fpproc = NULL;
-                               /* Enable the FPU */
-                       }
                        if (CLKF_INTR((struct clockframe *)tf) || !curproc) {
-                               fpproc = &proc0;
+                               newfpproc = &proc0;
                        } else {
-                               fpproc = curproc;
+                               newfpproc = curproc;
                        }
-                       /* If we have an allocated fpstate then load it */
-                       if (fpproc->p_md.md_fpstate != 0)
-                               loadfpstate(fpproc->p_md.md_fpstate);
-                       else
-                               fpproc = NULL;
+                       if (fpproc != newfpproc) {
+                               if (fpproc != NULL) {
+                               /* someone else had it, maybe? */
+                                       savefpstate(fpproc->p_md.md_fpstate);
+                                       fpproc = NULL;
+                               }
+                               /* If we have an allocated fpstate, load it */
+                               if (newfpproc->p_md.md_fpstate != 0) {
+                                       fpproc = newfpproc;
+                                       loadfpstate(fpproc->p_md.md_fpstate);
+                               } else
+                                       fpproc = NULL;
+                       }
+                       /* Enable the FPU */
                        tf->tf_tstate |= (PSTATE_PEF<<TSTATE_PSTATE_SHIFT);
                        return;
 #endif