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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/powerpc/math-emu/fmul.c | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/math-emu/fmul.c')
-rw-r--r-- | arch/powerpc/math-emu/fmul.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fmul.c b/arch/powerpc/math-emu/fmul.c new file mode 100644 index 000000000..d114f7acd --- /dev/null +++ b/arch/powerpc/math-emu/fmul.c @@ -0,0 +1,46 @@ +// 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 +fmul(void *frD, void *frA, void *frB) +{ + FP_DECL_D(A); + FP_DECL_D(B); + FP_DECL_D(R); + FP_DECL_EX; + +#ifdef DEBUG + printk("%s: %p %p %p\n", __func__, frD, frA, frB); +#endif + + FP_UNPACK_DP(A, frA); + FP_UNPACK_DP(B, frB); + +#ifdef DEBUG + printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n", + A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023); + printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n", + B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023); +#endif + + if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) || + (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF)) + FP_SET_EXCEPTION(EFLAG_VXIMZ); + + FP_MUL_D(R, A, B); + +#ifdef DEBUG + printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n", + R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023); +#endif + + __FP_PACK_D(frD, R); + + return FP_CUR_EXCEPTIONS; +} |