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authorKumar Gala <galak@kernel.crashing.org>2008-06-04 02:59:29 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-10-01 08:40:07 -0500
commitd2b194ed820880eb19c43b9c10d9f5f30026ee54 (patch)
tree1ac21746a8c4395c7e7fd73a60202db892fe4d76 /arch/powerpc/math-emu/mtfsf.c
parenta969e76a7101bf5f3d369563df1ca1253dd6131b (diff)
powerpc/math-emu: Use kernel generic math-emu code
The math emulation code is centered around a set of generic macros that provide the core of the emulation that are shared by the various architectures and other projects (like glibc). Each arch implements its own sfp-machine.h to specific various arch specific details. For historic reasons that are now lost the powerpc math-emu code had its own version of the common headers. This moves us to using the kernel generic version and thus getting fixes when those are updated. Also cleaned up exception/error reporting from the FP emulation functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/math-emu/mtfsf.c')
-rw-r--r--arch/powerpc/math-emu/mtfsf.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/powerpc/math-emu/mtfsf.c b/arch/powerpc/math-emu/mtfsf.c
index 48014d8e3af1..dbce92e4f046 100644
--- a/arch/powerpc/math-emu/mtfsf.c
+++ b/arch/powerpc/math-emu/mtfsf.c
@@ -2,12 +2,14 @@
#include <linux/errno.h>
#include <asm/uaccess.h>
-#include "soft-fp.h"
+#include <asm/sfp-machine.h>
+#include <math-emu/soft-fp.h>
int
mtfsf(unsigned int FM, u32 *frB)
{
u32 mask;
+ u32 fpscr;
if (FM == 0)
return 0;
@@ -37,6 +39,22 @@ mtfsf(unsigned int FM, u32 *frB)
__FPU_FPSCR &= ~(mask);
__FPU_FPSCR |= (frB[1] & mask);
+ __FPU_FPSCR &= ~(FPSCR_VX);
+ if (__FPU_FPSCR & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI |
+ FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC |
+ FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI))
+ __FPU_FPSCR |= FPSCR_VX;
+
+ fpscr = __FPU_FPSCR;
+ fpscr &= ~(FPSCR_FEX);
+ if (((fpscr & FPSCR_VX) && (fpscr & FPSCR_VE)) ||
+ ((fpscr & FPSCR_OX) && (fpscr & FPSCR_OE)) ||
+ ((fpscr & FPSCR_UX) && (fpscr & FPSCR_UE)) ||
+ ((fpscr & FPSCR_ZX) && (fpscr & FPSCR_ZE)) ||
+ ((fpscr & FPSCR_XX) && (fpscr & FPSCR_XE)))
+ fpscr |= FPSCR_FEX;
+ __FPU_FPSCR = fpscr;
+
#ifdef DEBUG
printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR);
#endif