20090612-1947

1 files changed, 83 insertions, 0 deletions

diff --git a/Linux/power/include/fpuctl.h b/Linux/power/include/fpuctl.h
new file mode 100644
index 00000000..fd03942c
--- /dev/null
+++ b/Linux/power/include/fpuctl.h
@@ -0,0 +1,83 @@
+/*
+ * Linux PPC
+ * Mimic Plan9 floating point support
+ */
+
+static __inline__ ulong
+getfcr(void)
+{
+	float fpscr;
+
+	__asm__ __volatile__ ("mffs %0" : "=&f" (fpscr):);
+
+	return (ulong)fpscr;
+}
+
+static __inline__ ulong
+getfsr(void)
+{
+	float fpscr;
+
+	__asm__ __volatile__ ("mffs %0" : "=&f" (fpscr):);
+
+	return (ulong) fpscr;
+}
+
+static __inline__ void
+setfsr(ulong fsr)
+{
+	float t = (float) fsr;
+
+	__asm__ __volatile__("mtfsf 0xff, %0" : : "f" (t) );
+}
+
+static __inline__ void
+setfcr(ulong fcr)
+{
+	float t = (float) fcr;
+
+	__asm__ __volatile__("mtfsf 0xff, %0" : : "f" (t) );
+}
+
+/* FPSCR */
+#define	FPSFX	(1<<31)	/* exception summary (sticky) */
+#define	FPSEX	(1<<30)	/* enabled exception summary */
+#define	FPSVX	(1<<29)	/* invalid operation exception summary */
+#define	FPSOX	(1<<28)	/* overflow exception OX (sticky) */
+#define	FPSUX	(1<<27)	/* underflow exception UX (sticky) */
+#define	FPSZX	(1<<26)	/* zero divide exception ZX (sticky) */
+#define	FPSXX	(1<<25)	/* inexact exception XX (sticky) */
+#define	FPSVXSNAN (1<<24)	/* invalid operation exception for SNaN (sticky) */
+#define	FPSVXISI	(1<<23)	/* invalid operation exception for ∞-∞ (sticky) */
+#define	FPSVXIDI	(1<<22)	/* invalid operation exception for ∞/∞ (sticky) */
+#define	FPSVXZDZ (1<<21)	/* invalid operation exception for 0/0 (sticky) */
+#define	FPSVXIMZ	(1<<20)	/* invalid operation exception for ∞*0 (sticky) */
+#define	FPSVXVC	(1<<19)	/* invalid operation exception for invalid compare (sticky) */
+#define	FPSFR	(1<<18)	/* fraction rounded */
+#define	FPSFI	(1<<17)	/* fraction inexact */
+#define	FPSFPRF	(1<<16)	/* floating point result class */
+#define	FPSFPCC	(0xF<<12)	/* <, >, =, unordered */
+#define	FPVXCVI	(1<<8)	/* enable exception for invalid integer convert (sticky) */
+
+/* FCR */
+#define	FPVE	(1<<7)	/* invalid operation exception enable */
+#define	FPOVFL	(1<<6)	/* enable overflow exceptions */
+#define	FPUNFL	(1<<5)	/* enable underflow */
+#define	FPZDIV	(1<<4)	/* enable zero divide */
+#define	FPINEX	(1<<3)	/* enable inexact exceptions */
+#define	FPRMASK	(3<<0)	/* rounding mode */
+#define	FPRNR	(0<<0)
+#define	FPRZ	(1<<0)
+#define	FPRPINF	(2<<0)
+#define	FPRNINF	(3<<0)
+#define	FPPEXT	0
+#define	FPPSGL	0
+#define	FPPDBL	0
+#define	FPPMASK	0
+#define	FPINVAL	FPVE
+/* FSR */
+#define	FPAOVFL	FPSOX
+#define	FPAINEX	FPSXX
+#define	FPAUNFL	FPSUX
+#define	FPAZDIV	FPSZX
+#define	FPAINVAL	FPSVX