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authorGravatar xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e>2014-07-27 07:35:49 +0000
committerGravatar xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e>2014-07-27 07:35:49 +0000
commitf4e106d4fc1cce484678b5cdd86ab57d7a43076a (patch)
tree3de9bddc63b80fb1b695bbdb8fa5bd6aa893a13a /runtime/arm/i64_shl.s
parent04ff02a9f4bc4f766a450e5463729102ee26882e (diff)
ARM port: add support for Thumb2. To be tested.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2549 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'runtime/arm/i64_shl.s')
-rw-r--r--runtime/arm/i64_shl.s72
1 files changed, 0 insertions, 72 deletions
diff --git a/runtime/arm/i64_shl.s b/runtime/arm/i64_shl.s
deleted file mode 100644
index afd92db..0000000
--- a/runtime/arm/i64_shl.s
+++ /dev/null
@@ -1,72 +0,0 @@
-@ *****************************************************************
-@
-@ The Compcert verified compiler
-@
-@ Xavier Leroy, INRIA Paris-Rocquencourt
-@
-@ Copyright (c) 2013 Institut National de Recherche en Informatique et
-@ en Automatique.
-@
-@ Redistribution and use in source and binary forms, with or without
-@ modification, are permitted provided that the following conditions are met:
-@ * Redistributions of source code must retain the above copyright
-@ notice, this list of conditions and the following disclaimer.
-@ * Redistributions in binary form must reproduce the above copyright
-@ notice, this list of conditions and the following disclaimer in the
-@ documentation and/or other materials provided with the distribution.
-@ * Neither the name of the <organization> nor the
-@ names of its contributors may be used to endorse or promote products
-@ derived from this software without specific prior written permission.
-@
-@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-@ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-@ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-@ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT
-@ HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-@ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-@ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-@ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-@ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-@ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-@
-@ *********************************************************************
-
-@ Helper functions for 64-bit integer arithmetic. ARM version.
-
- .text
-
-@@@ Shift left
-
-@ Note on ARM shifts: the shift amount is taken modulo 256.
-@ If shift amount mod 256 >= 32, the shift produces 0.
-
-@ Algorithm:
-@ RH = (XH << N) | (XL >> (32-N) | (XL << (N-32))
-@ RL = XL << N
-@ If N = 0:
-@ RH = XH | 0 | 0
-@ RL = XL
-@ If 1 <= N <= 31: 1 <= 32-N <= 31 and 255 <= N-32 mod 256 <= 255
-@ RH = (XH << N) | (XL >> (32-N) | 0
-@ RL = XL << N
-@ If N = 32:
-@ RH = 0 | XL | 0
-@ RL = 0
-@ If 33 <= N <= 63: 255 <= 32-N mod 256 <= 255 and 1 <= N-32 <= 31
-@ RH = 0 | 0 | (XL << (N-32))
-@ RL = 0
-
- .global __i64_shl
-__i64_shl:
- and r2, r2, #63 @ normalize amount to 0...63
- rsb r3, r2, #32 @ r3 = 32 - amount
- mov r1, r1, lsl r2
- orr r1, r1, r0, lsr r3
- sub r3, r2, #32 @ r3 = amount - 32
- orr r1, r1, r0, lsl r3
- mov r0, r0, lsl r2
- bx lr
- .type __i64_shl, %function
- .size __i64_shl, . - __i64_shl
-