bfc6dc4ca8
GGLAssembler assumes addresses to be 32-bit and uses ARM 32-bit instructions to load/store/manipulate addresses. To support, 64-bit architectures, following changes has been done 1. ARMAssemblerInterface has been extended to support four new operations ADDR_LDR, ADDR_STR, ADDR_SUB, ADDR_ADD. Base class implements these virtual functions to use 32bit equivalent function. This avoids existing 32-bit Assembler backend implementations like ARMAssembler and MIPSAssembler from mapping the new functions to existing equivalent routines. This also allows 64-bit Architectures like AArch64 to override the function in their assembler backend implementations. 2. GGLAssembler code (spread over GGLAssembler.cpp, GGLAssembler.h and texturing.cpp) has been changed to use the new operations for address operations. Change-Id: I3d7eace4691e3e47cef737d97ac67ce6ef4fb18d Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/* libs/pixelflinger/codeflinger/ARMAssemblerInterface.cpp
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**
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** Copyright 2006, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <cutils/log.h>
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#include "ARMAssemblerInterface.h"
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namespace android {
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// ----------------------------------------------------------------------------
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ARMAssemblerInterface::~ARMAssemblerInterface()
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{
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}
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// --------------------------------------------------------------------
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// The following two functions are static and used for initializers
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// in the original ARM code. The above versions (without __), are now
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// virtual, and can be overridden in the MIPS code. But since these are
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// needed at initialization time, they must be static. Not thrilled with
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// this implementation, but it works...
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uint32_t ARMAssemblerInterface::__immed12_pre(int32_t immed12, int W)
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{
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LOG_ALWAYS_FATAL_IF(abs(immed12) >= 0x800,
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"LDR(B)/STR(B)/PLD immediate too big (%08x)",
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immed12);
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return (1<<24) | (((uint32_t(immed12)>>31)^1)<<23) |
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((W&1)<<21) | (abs(immed12)&0x7FF);
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}
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uint32_t ARMAssemblerInterface::__immed8_pre(int32_t immed8, int W)
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{
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uint32_t offset = abs(immed8);
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LOG_ALWAYS_FATAL_IF(abs(immed8) >= 0x100,
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"LDRH/LDRSB/LDRSH/STRH immediate too big (%08x)",
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immed8);
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return (1<<24) | (1<<22) | (((uint32_t(immed8)>>31)^1)<<23) |
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((W&1)<<21) | (((offset&0xF0)<<4)|(offset&0xF));
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}
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// The following four functions are required for address manipulation
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// These are virtual functions, which can be overridden by architectures
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// that need special handling of address values (e.g. 64-bit arch)
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void ARMAssemblerInterface::ADDR_LDR(int cc, int Rd,
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int Rn, uint32_t offset)
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{
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LDR(cc, Rd, Rn, offset);
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}
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void ARMAssemblerInterface::ADDR_STR(int cc, int Rd,
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int Rn, uint32_t offset)
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{
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STR(cc, Rd, Rn, offset);
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}
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void ARMAssemblerInterface::ADDR_ADD(int cc, int s,
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int Rd, int Rn, uint32_t Op2)
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{
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dataProcessing(opADD, cc, s, Rd, Rn, Op2);
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}
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void ARMAssemblerInterface::ADDR_SUB(int cc, int s,
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int Rd, int Rn, uint32_t Op2)
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{
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dataProcessing(opSUB, cc, s, Rd, Rn, Op2);
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}
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}; // namespace android
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