From: Roland McGrath <roland@gnu.org>
Date: Sat, 3 Sep 1994 02:31:57 +0000 (+0000)
Subject: Restore FPU state.  Code from kkojima.
X-Git-Tag: glibc-2.16-ports-before-merge~4054
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7704bac4de34fe1c3d367c02de17ed79577f2379;p=thirdparty%2Fglibc.git

Restore FPU state.  Code from kkojima.
---

diff --git a/sysdeps/mach/hurd/mips/sigreturn.c b/sysdeps/mach/hurd/mips/sigreturn.c
index f02e799dcbc..0b3a474986e 100644
--- a/sysdeps/mach/hurd/mips/sigreturn.c
+++ b/sysdeps/mach/hurd/mips/sigreturn.c
@@ -77,8 +77,30 @@ __sigreturn (struct sigcontext *scp)
 
   if (scp->sc_coproc_used & SC_COPROC_USE_FPU)
     {
-      /* XXX should restore FPU state here */
-      abort ();
+      /* Restore FPU state.  */
+#define restore_fpr(n) \
+  asm volatile ("l.d $f" #n ",%0" : : "m" (scp->sc_fpr[n]))
+
+      /* Restore floating-point registers. */
+      restore_fpr (0);
+      restore_fpr (2);
+      restore_fpr (4);
+      restore_fpr (6);
+      restore_fpr (8);
+      restore_fpr (10);
+      restore_fpr (12);
+      restore_fpr (14);
+      restore_fpr (16);
+      restore_fpr (18);
+      restore_fpr (20);
+      restore_fpr (22);
+      restore_fpr (24);
+      restore_fpr (26);
+      restore_fpr (28);
+      restore_fpr (30);
+
+      /* Restore the floating-point control/status register ($f31).  */
+      asm volatile ("ctc1 %0,$f31" : : "r" (scp->sc_fpcsr));
     }
 
   /* Load all the registers from the sigcontext.  */