Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / lib / _lshrdi3.S

diff --git a/qemu/roms/u-boot/arch/powerpc/lib/_lshrdi3.S b/qemu/roms/u-boot/arch/powerpc/lib/_lshrdi3.S
new file mode 100644 (file)
index 0000000..7dbc5de
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/lib/_lshrdi3.S
@@ -0,0 +1,42 @@
+/*
+ * This code was copied from arch/powerpc/kernel/misc_32.S in the Linux
+ * kernel sources (commit 85e2efbb1db9a18d218006706d6e4fbeb0216213, also
+ * known as 2.6.38-rc5).  The source file copyrights are as follows:
+ *
+ * (C) Copyright 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+#include <config.h>
+
+/*
+ * Extended precision shifts.
+ *
+ * Updated to be valid for shift counts from 0 to 63 inclusive.
+ * -- Gabriel
+ *
+ * R3/R4 has 64 bit value
+ * R5    has shift count
+ * result in R3/R4
+ *
+ *  ashrdi3: arithmetic right shift (sign propagation)
+ *  lshrdi3: logical right shift
+ *  ashldi3: left shift
+ */
+       .globl __lshrdi3
+__lshrdi3:
+       subfic  r6,r5,32
+       srw     r4,r4,r5        # LSW = count > 31 ? 0 : LSW >> count
+       addi    r7,r5,32        # could be xori, or addi with -32
+       slw     r6,r3,r6        # t1 = count > 31 ? 0 : MSW << (32-count)
+       srw     r7,r3,r7        # t2 = count < 32 ? 0 : MSW >> (count-32)
+       or      r4,r4,r6        # LSW |= t1
+       srw     r3,r3,r5        # MSW = MSW >> count
+       or      r4,r4,r7        # LSW |= t2
+       blr