diff options
Diffstat (limited to 'arch/powerpc/math-emu/fsqrt.c')
| -rw-r--r-- | arch/powerpc/math-emu/fsqrt.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fsqrt.c b/arch/powerpc/math-emu/fsqrt.c new file mode 100644 index 0000000000..0543859038 --- /dev/null +++ b/arch/powerpc/math-emu/fsqrt.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/uaccess.h> + +#include <asm/sfp-machine.h> +#include <math-emu/soft-fp.h> +#include <math-emu/double.h> + +int +fsqrt(void *frD, void *frB) +{ + FP_DECL_D(B); + FP_DECL_D(R); + FP_DECL_EX; + +#ifdef DEBUG + printk("%s: %p %p %p %p\n", __func__, frD, frB); +#endif + + FP_UNPACK_DP(B, frB); + +#ifdef DEBUG + printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); +#endif + + if (B_s && B_c != FP_CLS_ZERO) + FP_SET_EXCEPTION(EFLAG_VXSQRT); + if (B_c == FP_CLS_NAN) + FP_SET_EXCEPTION(EFLAG_VXSNAN); + + FP_SQRT_D(R, B); + +#ifdef DEBUG + printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); +#endif + + __FP_PACK_D(frD, R); + + return FP_CUR_EXCEPTIONS; +} |