pc, xen: move fpu setup/fork/save/restore handlers to pc/fpu.c

2 files changed, 9 insertions, 36 deletions

diff --git a/sys/src/9/xen/fns.h b/sys/src/9/xen/fns.h
index bc87a60ef..32a101935 100644
--- a/sys/src/9/xen/fns.h
+++ b/sys/src/9/xen/fns.h
@@ -11,6 +11,10 @@ int		cmpswap486(long*, long, long);
 void	(*coherence)(void);
 void	cpuid(int, int, ulong regs[]);
 void	fpuinit(void);
+void	fpuprocsetup(Proc*);
+void	fpuprocfork(Proc*);
+void	fpuprocsave(Proc*);
+void	fpuprocrestore(Proc*);
 int		cpuidentify(void);
 void	cpuidprint(void);
 void	(*cycles)(uvlong*);
diff --git a/sys/src/9/xen/main.c b/sys/src/9/xen/main.c
index 22fe77dd4..61bf5bf4c 100644
--- a/sys/src/9/xen/main.c
+++ b/sys/src/9/xen/main.c
@@ -322,39 +322,22 @@ confinit(void)
 	}
 }
 
-/*
- *  set up floating point for a new process
- */
 void
-procsetup(Proc*p)
+procsetup(Proc *p)
 {
-	p->fpstate = FPinit;
-	fpoff();
+	fpuprocsetup(p);
 }
 
 void
 procfork(Proc *p)
 {
-	int s;
-
-	/* save floating point state */
-	s = splhi();
-	switch(up->fpstate & ~FPillegal){
-	case FPactive:
-		fpsave(up->fpsave);
-		up->fpstate = FPinactive;
-	case FPinactive:
-		while(p->fpsave == nil)
-			p->fpsave = mallocalign(sizeof(FPsave), FPalign, 0, 0);
-		memmove(p->fpsave, up->fpsave, sizeof(FPsave));
-		p->fpstate = FPinactive;
-	}
-	splx(s);
+	fpuprocfork(p);
 }
 
 void
 procrestore(Proc *p)
 {
+	fpuprocrestore(p);
 }
 
 /*
@@ -363,21 +346,7 @@ procrestore(Proc *p)
 void
 procsave(Proc *p)
 {
-	if(p->fpstate == FPactive){
-		if(p->state == Moribund)
-			fpclear();
-		else{
-			/*
-			 * Fpsave() stores without handling pending
-			 * unmasked exeptions. Postnote() can't be called
-			 * so the handling of pending exceptions is delayed
-			 * until the process runs again and generates an
-			 * emulation fault to activate the FPU.
-			 */
-			fpsave(p->fpsave);
-		}
-		p->fpstate = FPinactive;
-	}
+	fpuprocsave(p);
 
 	/*
 	 * While this processor is in the scheduler, the process could run