64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#include <linux/types.h>
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#include <linux/errno.h>
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#include <asm/uaccess.h>
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#include <asm/sfp-machine.h>
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#include <math-emu/soft-fp.h>
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int
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mtfsf(unsigned int FM, u32 *frB)
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{
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u32 mask;
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u32 fpscr;
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if (FM == 0)
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return 0;
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if (FM == 0xff)
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mask = 0x9fffffff;
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else {
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mask = 0;
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if (FM & (1 << 0))
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mask |= 0x90000000;
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if (FM & (1 << 1))
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mask |= 0x0f000000;
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if (FM & (1 << 2))
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mask |= 0x00f00000;
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if (FM & (1 << 3))
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mask |= 0x000f0000;
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if (FM & (1 << 4))
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mask |= 0x0000f000;
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if (FM & (1 << 5))
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mask |= 0x00000f00;
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if (FM & (1 << 6))
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mask |= 0x000000f0;
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if (FM & (1 << 7))
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mask |= 0x0000000f;
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}
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__FPU_FPSCR &= ~(mask);
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__FPU_FPSCR |= (frB[1] & mask);
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__FPU_FPSCR &= ~(FPSCR_VX);
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if (__FPU_FPSCR & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI |
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FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC |
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FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI))
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__FPU_FPSCR |= FPSCR_VX;
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fpscr = __FPU_FPSCR;
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fpscr &= ~(FPSCR_FEX);
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if (((fpscr & FPSCR_VX) && (fpscr & FPSCR_VE)) ||
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((fpscr & FPSCR_OX) && (fpscr & FPSCR_OE)) ||
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((fpscr & FPSCR_UX) && (fpscr & FPSCR_UE)) ||
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((fpscr & FPSCR_ZX) && (fpscr & FPSCR_ZE)) ||
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((fpscr & FPSCR_XX) && (fpscr & FPSCR_XE)))
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fpscr |= FPSCR_FEX;
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__FPU_FPSCR = fpscr;
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#ifdef DEBUG
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printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR);
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#endif
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return 0;
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}
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