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https://github.com/Telecominfraproject/OpenCellular.git
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26984c7de4
symptom: Enable debugging and profiling statistics for hook functions (#define CONFIG_HOOK_DEBUG), and __muldi3 function is missing while link. Signed-off-by: Dino Li <dino.li@ite.com.tw> BRANCH=none BUG=none TEST=1. compile successful and hook_notify starting to print message. 2. console "hookstats" Change-Id: Ia2815bcefd0f9ac06dab9c75ea6ee06312878ca2 Reviewed-on: https://chromium-review.googlesource.com/293432 Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Dino Li <dino.li@ite.com.tw> Tested-by: Dino Li <dino.li@ite.com.tw>
41 lines
1.1 KiB
ArmAsm
41 lines
1.1 KiB
ArmAsm
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* __muldi3.S: signed 64 bit multiplication
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*/
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#define P1H $r1
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#define P1L $r0
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#define P2H $r3
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#define P2L $r2
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.text
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.align 2
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.globl __muldi3
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.type __muldi3, @function
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__muldi3:
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mul $r5, P1H, P2L ! (ah=a>>31)*(bl=b&0xffffffff)
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srli P1H, P1L, 16 ! alh=al>>16
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maddr32 $r5, P1L, P2H ! ah*bl+(bh=b>>31)*(al=a&0xffffffff)
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zeh P1L, P1L ! all=al&0xffff
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srli P2H, P2L, 16 ! blh=bl>>16
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zeh P2L, P2L ! bll=bl&0xffff
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mul $ta, P1L, P2H ! zA=all*blh
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mul $r4, P1L, P2L ! zl=all*bll
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mul P2L, P1H, P2L ! zB=alh*bll
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add P1L, $ta, P2L ! zA+=zB
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slt $ta, P1L, P2L ! zA<zB
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slli $ta, $ta, 16 ! (zA<zB)<<16
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slli P2L, P1L, 16 ! zA<<16
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maddr32 $ta, P1H, P2H ! zh=alh*blh+((zA<zB)<<16)
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srli P1H, P1L, 16 ! zA>>16
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add P1H, P1H, $ta ! zh+=(zA>>16)
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add P1L, $r4, P2L ! zl+=(zA<<16)
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slt $ta, P1L, $r4 ! zl<zA
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add P1H, P1H, $ta ! zh+=(zl<zA)
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add P1H, P1H, $r5 ! zh+=ah*bl+bh*al
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ret
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.size __muldi3, .-__muldi3
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