ARMAssembler generated scanline__

I normolly get the message
generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x388750:0x38880c] in 712163 ns in logcat view, android.

While searching for ARMAssembler generated scanline__ on google I got the following results referring to scanline.cpp.
http://source-android.frandroid.com/system/core/libpixelflinger/scanline.cpp
or
http://gitorious.org/android-enablement/system-core/blobs/6090dacd1894429baaf13f7b30b2f6e9e2c1617f/libpixelflinger/scanline.cpp

The part of the code is like this

/* libs/pixelflinger/scanline.cpp
**
** Copyright 2006-2011, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License"); 
** you may not use this file except in compliance with the License. 
** You may obtain a copy of the License at 
**
**     http://www.apache.org/licenses/LICENSE-2.0 
**
** Unless required by applicable law or agreed to in writing, software 
** distributed under the License is distributed on an "AS IS" BASIS, 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License.
*/


#define LOG_TAG "pixelflinger"

#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <cutils/memory.h>
#include <cutils/log.h>

#include "buffer.h"
#include "scanline.h"

#include "codeflinger/CodeCache.h"
#include "codeflinger/GGLAssembler.h"
#include "codeflinger/ARMAssembler.h"
//#include "codeflinger/ARMAssemblerOptimizer.h"

// ----------------------------------------------------------------------------

#define ANDROID_CODEGEN_GENERIC     0   // force generic pixel pipeline
#define ANDROID_CODEGEN_C           1   // hand-written C, fallback generic 
#define ANDROID_CODEGEN_ASM         2   // hand-written asm, fallback generic
#define ANDROID_CODEGEN_GENERATED   3   // hand-written asm, fallback codegen

#ifdef NDEBUG
#   define ANDROID_RELEASE
#   define ANDROID_CODEGEN      ANDROID_CODEGEN_GENERATED
#else
#   define ANDROID_DEBUG
#   define ANDROID_CODEGEN      ANDROID_CODEGEN_GENERATED
#endif

#if defined(__arm__)
#   define ANDROID_ARM_CODEGEN  1
#else
#   define ANDROID_ARM_CODEGEN  0
#endif

#define DEBUG__CODEGEN_ONLY     0

/* Set to 1 to dump to the log the states that need a new
 * code-generated scanline callback, i.e. those that don't
 * have a corresponding shortcut function.
 */
#define DEBUG_NEEDS  0

#define ASSEMBLY_SCRATCH_SIZE   2048

// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------

static void init_y(context_t*, int32_t);
static void init_y_noop(context_t*, int32_t);
static void init_y_packed(context_t*, int32_t);
static void init_y_error(context_t*, int32_t);

static void step_y__generic(context_t* c);
static void step_y__nop(context_t*);
static void step_y__smooth(context_t* c);
static void step_y__tmu(context_t* c);
static void step_y__w(context_t* c);

static void scanline(context_t* c);
static void scanline_perspective(context_t* c);
static void scanline_perspective_single(context_t* c);
static void scanline_t32cb16blend(context_t* c);
static void scanline_t32cb16blend_dither(context_t* c);
static void scanline_t32cb16blend_srca(context_t* c);
static void scanline_t32cb16blend_clamp(context_t* c);
static void scanline_t32cb16blend_clamp_dither(context_t* c);
static void scanline_t32cb16blend_clamp_mod(context_t* c);
static void scanline_x32cb16blend_clamp_mod(context_t* c);
static void scanline_t32cb16blend_clamp_mod_dither(context_t* c);
static void scanline_x32cb16blend_clamp_mod_dither(context_t* c);
static void scanline_t32cb16(context_t* c);
static void scanline_t32cb16_dither(context_t* c);
static void scanline_t32cb16_clamp(context_t* c);
static void scanline_t32cb16_clamp_dither(context_t* c);
static void scanline_col32cb16blend(context_t* c);
static void scanline_t16cb16_clamp(context_t* c);
static void scanline_t16cb16blend_clamp_mod(context_t* c);
static void scanline_memcpy(context_t* c);
static void scanline_memset8(context_t* c);
static void scanline_memset16(context_t* c);
static void scanline_memset32(context_t* c);
static void scanline_noop(context_t* c);
static void scanline_set(context_t* c);
static void scanline_clear(context_t* c);

static void rect_generic(context_t* c, size_t yc);
static void rect_memcpy(context_t* c, size_t yc);

extern "C" void scanline_t32cb16blend_arm(uint16_t*, uint32_t*, size_t);
extern "C" void scanline_t32cb16_arm(uint16_t *dst, uint32_t *src, size_t ct);
extern "C" void scanline_col32cb16blend_neon(uint16_t *dst, uint32_t *col, size_t ct);
extern "C" void scanline_col32cb16blend_arm(uint16_t *dst, uint32_t col, size_t ct);

// ----------------------------------------------------------------------------

static inline uint16_t  convertAbgr8888ToRgb565(uint32_t  pix)
{
    return uint16_t( ((pix << 8) & 0xf800) |
                      ((pix >> 5) & 0x07e0) |
                      ((pix >> 19) & 0x001f) );
}

struct shortcut_t {
    needs_filter_t  filter;
    const char*     desc;
    void            (*scanline)(context_t*);
    void            (*init_y)(context_t*, int32_t);
};

...........................

}

What actually is ARM?

ARM (formerly Advanced RISC Machine and Acorn RISC Machine) is a reduced instruction set computer (RISC) instruction set architecture (ISA) developed by ARM Holdings. The ARM architecture is the most widely used 32-bit instruction set architecture in numbers produced.