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Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/math-emu/fmadd.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fmadd.c b/arch/powerpc/math-emu/fmadd.c new file mode 100644 index 000000000..e8458aed5 --- /dev/null +++ b/arch/powerpc/math-emu/fmadd.c @@ -0,0 +1,52 @@ +// 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 +fmadd(void *frD, void *frA, void *frB, void *frC) +{ + FP_DECL_D(R); + FP_DECL_D(A); + FP_DECL_D(B); + FP_DECL_D(C); + FP_DECL_D(T); + FP_DECL_EX; + +#ifdef DEBUG + printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC); +#endif + + FP_UNPACK_DP(A, frA); + FP_UNPACK_DP(B, frB); + FP_UNPACK_DP(C, frC); + +#ifdef DEBUG + printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c); + printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c); + printk("C: %ld %lu %lu %ld (%ld)\n", C_s, C_f1, C_f0, C_e, C_c); +#endif + + if ((A_c == FP_CLS_INF && C_c == FP_CLS_ZERO) || + (A_c == FP_CLS_ZERO && C_c == FP_CLS_INF)) + FP_SET_EXCEPTION(EFLAG_VXIMZ); + + FP_MUL_D(T, A, C); + + if (T_s != B_s && T_c == FP_CLS_INF && B_c == FP_CLS_INF) + FP_SET_EXCEPTION(EFLAG_VXISI); + + FP_ADD_D(R, T, B); + +#ifdef DEBUG + printk("D: %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; +} |