Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / math-emu / fsel.c

diff --git a/kernel/arch/powerpc/math-emu/fsel.c b/kernel/arch/powerpc/math-emu/fsel.c
new file mode 100644 (file)
index 0000000..1b0c144
--- /dev/null
+++ b/kernel/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;
+}