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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/powerpc/math-emu/fsel.c
Initial import
Diffstat (limited to 'arch/powerpc/math-emu/fsel.c')
-rw-r--r--arch/powerpc/math-emu/fsel.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fsel.c b/arch/powerpc/math-emu/fsel.c
new file mode 100644
index 000000000..1b0c14498
--- /dev/null
+++ b/arch/powerpc/math-emu/fsel.c
@@ -0,0 +1,40 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include <asm/sfp-machine.h>
+#include <math-emu/soft-fp.h>
+#include <math-emu/double.h>
+
+int
+fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
+{
+ FP_DECL_D(A);
+ FP_DECL_EX;
+
+#ifdef DEBUG
+ printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
+#endif
+
+ FP_UNPACK_DP(A, frA);
+
+#ifdef DEBUG
+ printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
+ printk("B: %08x %08x\n", frB[0], frB[1]);
+ printk("C: %08x %08x\n", frC[0], frC[1]);
+#endif
+
+ if (A_c == FP_CLS_NAN || (A_c != FP_CLS_ZERO && A_s)) {
+ frD[0] = frB[0];
+ frD[1] = frB[1];
+ } else {
+ frD[0] = frC[0];
+ frD[1] = frC[1];
+ }
+
+#ifdef DEBUG
+ printk("D: %08x.%08x\n", frD[0], frD[1]);
+#endif
+
+ return 0;
+}