Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arc / lib / strlen.S

diff --git a/qemu/roms/u-boot/arch/arc/lib/strlen.S b/qemu/roms/u-boot/arch/arc/lib/strlen.S
new file mode 100644 (file)
index 0000000..666e22c
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arc/lib/strlen.S
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+.global strlen
+.align 4
+strlen:
+       or      %r3, %r0, 7
+       ld      %r2, [%r3, -7]
+       ld.a    %r6, [%r3, -3]
+       mov     %r4, 0x01010101
+       /* uses long immediate */
+#ifdef __LITTLE_ENDIAN__
+       asl_s   %r1, %r0, 3
+       btst_s  %r0, 2
+       asl     %r7, %r4, %r1
+       ror     %r5, %r4
+       sub     %r1, %r2, %r7
+       bic_s   %r1, %r1, %r2
+       mov.eq  %r7, %r4
+       sub     %r12, %r6, %r7
+       bic     %r12, %r12, %r6
+       or.eq   %r12, %r12, %r1
+       and     %r12, %r12, %r5
+       brne    %r12, 0, .Learly_end
+#else /* __BIG_ENDIAN__ */
+       ror     %r5, %r4
+       btst_s  %r0, 2
+       mov_s   %r1, 31
+       sub3    %r7, %r1, %r0
+       sub     %r1, %r2, %r4
+       bic_s   %r1, %r1, %r2
+       bmsk    %r1, %r1, %r7
+       sub     %r12, %r6, %r4
+       bic     %r12, %r12, %r6
+       bmsk.ne %r12, %r12, %r7
+       or.eq   %r12, %r12, %r1
+       and     %r12, %r12, %r5
+       brne    %r12, 0, .Learly_end
+#endif /* _ENDIAN__ */
+
+.Loop:
+       ld_s    %r2, [%r3, 4]
+       ld.a    %r6, [%r3, 8]
+       /* stall for load result */
+       sub     %r1, %r2, %r4
+       bic_s   %r1, %r1, %r2
+       sub     %r12, %r6, %r4
+       bic     %r12, %r12, %r6
+       or      %r12, %r12, %r1
+       and     %r12, %r12, %r5
+       breq    %r12, 0, .Loop
+.Lend:
+       and.f   %r1, %r1, %r5
+       sub.ne  %r3, %r3, 4
+       mov.eq  %r1, %r12
+#ifdef __LITTLE_ENDIAN__
+       sub_s   %r2, %r1, 1
+       bic_s   %r2, %r2, %r1
+       norm    %r1, %r2
+       sub_s   %r0, %r0, 3
+       lsr_s   %r1, %r1, 3
+       sub     %r0, %r3, %r0
+       j_s.d   [%blink]
+       sub     %r0, %r0, %r1
+#else /* __BIG_ENDIAN__ */
+       lsr_s   %r1, %r1, 7
+       mov.eq  %r2, %r6
+       bic_s   %r1, %r1, %r2
+       norm    %r1, %r1
+       sub     %r0, %r3, %r0
+       lsr_s   %r1, %r1, 3
+       j_s.d   [%blink]
+       add     %r0, %r0, %r1
+#endif /* _ENDIAN */
+.Learly_end:
+       b.d     .Lend
+       sub_s.ne %r1, %r1, %r1