diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc/math-emu/mtfsf.c | |
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!
Diffstat (limited to 'arch/ppc/math-emu/mtfsf.c')
| -rw-r--r-- | arch/ppc/math-emu/mtfsf.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/ppc/math-emu/mtfsf.c b/arch/ppc/math-emu/mtfsf.c new file mode 100644 index 000000000000..d70cf714994c --- /dev/null +++ b/arch/ppc/math-emu/mtfsf.c @@ -0,0 +1,45 @@ +#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; +} |