patch-2.3.16 linux/arch/ppc/math-emu/mtfsf.c

• Lines: 49
• Date: Tue Aug 31 11:36:43 1999
• Orig file: v2.3.15/linux/arch/ppc/math-emu/mtfsf.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/arch/ppc/math-emu/mtfsf.c linux/arch/ppc/math-emu/mtfsf.c
@@ -0,0 +1,48 @@
+/* $Id: mtfsf.c,v 1.1 1999/08/23 19:00:19 cort Exp $
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include "soft-fp.h"
+
+int
+mtfsf(unsigned int FM, u32 *frB)
+{
+	u32 mask;
+
+	if (FM == 0)
+		return 0;
+
+	if (FM == 0xff)
+		mask = 0x9fffffff;
+	else {
+		mask = 0;
+		if (FM & (1 << 0))
+			mask |= 0x90000000;
+		if (FM & (1 << 1))
+			mask |= 0x0f000000;
+		if (FM & (1 << 2))
+			mask |= 0x00f00000;
+		if (FM & (1 << 3))
+			mask |= 0x000f0000;
+		if (FM & (1 << 4))
+			mask |= 0x0000f000;
+		if (FM & (1 << 5))
+			mask |= 0x00000f00;
+		if (FM & (1 << 6))
+			mask |= 0x000000f0;
+		if (FM & (1 << 7))
+			mask |= 0x0000000f;
+	}
+
+	__FPU_FPSCR &= ~(mask);
+	__FPU_FPSCR |= (frB[1] & mask);
+
+#ifdef DEBUG
+	printk("%s: %02x %p: %08lx\n", __FUNCTION__, FM, frB, __FPU_FPSCR);
+#endif
+
+	return 0;
+}