summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/math-emu/fmul.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/powerpc/math-emu/fmul.c
parentInitial commit. (diff)
downloadlinux-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.c46
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;
+}