These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / tile / include / asm / word-at-a-time.h

diff --git a/kernel/arch/tile/include/asm/word-at-a-time.h b/kernel/arch/tile/include/asm/word-at-a-time.h
new file mode 100644 (file)
index 0000000..b66a693
--- /dev/null
+++ b/kernel/arch/tile/include/asm/word-at-a-time.h
@@ -0,0 +1,42 @@
+#ifndef _ASM_WORD_AT_A_TIME_H
+#define _ASM_WORD_AT_A_TIME_H
+
+#include <asm/byteorder.h>
+
+struct word_at_a_time { /* unused */ };
+#define WORD_AT_A_TIME_CONSTANTS {}
+
+/* Generate 0x01 byte values for zero bytes using a SIMD instruction. */
+static inline unsigned long has_zero(unsigned long val, unsigned long *data,
+                                    const struct word_at_a_time *c)
+{
+#ifdef __tilegx__
+       unsigned long mask = __insn_v1cmpeqi(val, 0);
+#else /* tilepro */
+       unsigned long mask = __insn_seqib(val, 0);
+#endif
+       *data = mask;
+       return mask;
+}
+
+/* These operations are both nops. */
+#define prep_zero_mask(val, data, c) (data)
+#define create_zero_mask(data) (data)
+
+/* And this operation just depends on endianness. */
+static inline long find_zero(unsigned long mask)
+{
+#ifdef __BIG_ENDIAN
+       return __builtin_clzl(mask) >> 3;
+#else
+       return __builtin_ctzl(mask) >> 3;
+#endif
+}
+
+#ifdef __BIG_ENDIAN
+#define zero_bytemask(mask) (~1ul << (63 - __builtin_clzl(mask)))
+#else
+#define zero_bytemask(mask) ((2ul << __builtin_ctzl(mask)) - 1)
+#endif
+
+#endif /* _ASM_WORD_AT_A_TIME_H */