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52 lines
1.1 KiB
52 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/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 (likely(FM == 1)) |
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mask = 0x0f; |
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else if (likely(FM == 0xff)) |
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mask = ~0; |
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else { |
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mask = ((FM & 1) | |
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((FM << 3) & 0x10) | |
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((FM << 6) & 0x100) | |
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((FM << 9) & 0x1000) | |
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((FM << 12) & 0x10000) | |
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((FM << 15) & 0x100000) | |
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((FM << 18) & 0x1000000) | |
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((FM << 21) & 0x10000000)) * 15; |
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} |
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fpscr = ((__FPU_FPSCR & ~mask) | (frB[1] & mask)) & |
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~(FPSCR_VX | FPSCR_FEX | 0x800); |
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if (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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fpscr |= FPSCR_VX; |
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/* The bit order of exception enables and exception status |
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* is the same. Simply shift and mask to check for enabled |
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* exceptions. |
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*/ |
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if (fpscr & (fpscr >> 22) & 0xf8) |
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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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