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linux/arch/powerpc/math-emu/mtfsf.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
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>
2008-06-04 00:59:29 -07:00
#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
int
mtfsf(unsigned int FM, u32 *frB)
{
u32 mask;
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>
2008-06-04 00:59:29 -07:00
u32 fpscr;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
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);
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>
2008-06-04 00:59:29 -07:00
__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;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#ifdef DEBUG
[POWERPC] Replace remaining __FUNCTION__ occurrences __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-03-28 14:21:07 -07:00
printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#endif
return 0;
}
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