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102 lines
3.4 KiB
102 lines
3.4 KiB
/*
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This file is part of FFTS -- The Fastest Fourier Transform in the South
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Copyright (c) 2012, Anthony M. Blake <amb@anthonix.com>
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Copyright (c) 2012, The University of Waikato
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the organization nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL ANTHONY M. BLAKE BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __CODEGEN_ARM_H__
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#define __CODEGEN_ARM_H__
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uint32_t BL(void *pos, void *target) {
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return 0xeb000000 | (((target - pos) / 4) & 0xffffff);
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}
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uint32_t B(uint8_t r) {
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return 0xe12fff10 | r;
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}
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uint32_t MOV(uint8_t dst, uint8_t src) {
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return 0xe1a00000 | (src & 0xf) | ((dst & 0xf) << 12);
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}
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void ADDI(uint32_t **p, uint8_t dst, uint8_t src, int32_t imm) {
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int32_t oimm = imm;
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if(imm < 0) {
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imm = -imm;
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uint32_t shamt = (__builtin_ctzl(imm)>23)?23:__builtin_ctzl(imm);
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if(shamt & 1) shamt -= 1;
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imm >>= shamt;
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shamt = (32 - shamt)/2;
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// if(imm > 255) fprintf(stderr, "imm>255: %d\n", oimm);
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*(*p)++ = 0xe2400000 | ((src & 0xf) << 16) | ((dst & 0xf) << 12) | ((shamt & 0xf) << 8) | (imm & 0xff);
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if(imm > 255) ADDI(p, dst, src, (oimm + ((imm & 0xff) << (32-shamt*2))));
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}else{
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uint32_t shamt = (__builtin_ctzl(imm)>23)?23:__builtin_ctzl(imm);
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if(shamt & 1) shamt -= 1;
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imm >>= shamt;
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shamt = (32 - shamt)/2;
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// if(imm > 255) fprintf(stderr, "imm>255: %d\n", oimm);
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*(*p)++ = 0xe2800000 | ((src & 0xf) << 16) | ((dst & 0xf) << 12) | ((shamt & 0xf) << 8) | (imm & 0xff);
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if(imm > 255) ADDI(p, dst, src, (oimm - ((imm & 0xff) << (32-shamt*2))));
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}
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}
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uint32_t LDRI(uint8_t dst, uint8_t base, uint32_t offset) {
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return 0xe5900000 | ((dst & 0xf) << 12)
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| ((base & 0xf) << 16) | (offset & 0xfff) ;
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}
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void MOVI(uint32_t **p, uint8_t dst, uint32_t imm) {
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uint32_t oimm = imm;
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uint32_t shamt = (__builtin_ctzl(imm)>23)?23:__builtin_ctzl(imm);
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if(shamt & 1) shamt -= 1;
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imm >>= shamt;
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shamt = (32 - shamt)/2;
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*(*p)++ = 0xe3a00000 | ((dst & 0xf) << 12) | ((shamt & 0xf) << 8) | (imm & 0xff) ;
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if(imm > 255) ADDI(p, dst, dst, (oimm - ((imm & 0xff) << (32-shamt*2))));
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}
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uint32_t PUSH_LR() { return 0xe92d4ff0; } //0xe92d4000; }
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uint32_t POP_LR() { return 0xe8bd8ff0; } //0xe8bd8000; }
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#endif
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