Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / metag / lib / ashldi3.S

diff --git a/kernel/arch/metag/lib/ashldi3.S b/kernel/arch/metag/lib/ashldi3.S
new file mode 100644 (file)
index 0000000..78d6974
--- /dev/null
+++ b/kernel/arch/metag/lib/ashldi3.S
@@ -0,0 +1,33 @@
+! Copyright (C) 2012 by Imagination Technologies Ltd.
+!
+! 64-bit arithmetic shift left routine.
+!
+
+       .text
+       .global ___ashldi3
+       .type   ___ashldi3,function
+
+___ashldi3:
+       MOV     D0Re0,D0Ar2
+       MOV     D1Re0,D1Ar1
+       CMP     D1Ar3,#0                ! COUNT == 0
+       MOVEQ   PC,D1RtP                ! Yes, return
+
+       SUBS    D0Ar4,D1Ar3,#32         ! N = COUNT - 32
+       BGE     $L10
+
+!! Shift < 32
+       NEG     D0Ar4,D0Ar4             ! N = - N
+       LSL     D1Re0,D1Re0,D1Ar3       ! HI = HI << COUNT
+       LSR     D0Ar6,D0Re0,D0Ar4       ! TMP= LO >> -(COUNT - 32)
+       OR      D1Re0,D1Re0,D0Ar6       ! HI = HI | TMP
+       SWAP    D0Ar4,D1Ar3
+       LSL     D0Re0,D0Re0,D0Ar4       ! LO = LO << COUNT
+       MOV     PC,D1RtP
+
+$L10:
+!! Shift >= 32
+       LSL     D1Re0,D0Re0,D0Ar4       ! HI = LO << N
+       MOV     D0Re0,#0                ! LO = 0
+       MOV     PC,D1RtP
+       .size ___ashldi3,.-___ashldi3