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dpavlin |
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/* |
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* Copyright (C) 2005 Anders Gavare. All rights reserved. |
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* |
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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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* |
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* 1. 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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* 2. 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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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: cpu_alpha_instr.c,v 1.2 2005/09/17 17:14:27 debug Exp $ |
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* |
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* Alpha instructions. |
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* |
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* Individual functions should keep track of cpu->n_translated_instrs. |
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* (If no instruction was executed, then it should be decreased. If, say, 4 |
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* instructions were combined into one function and executed, then it should |
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* be increased by 3.) |
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*/ |
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/* |
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* nop: Do nothing. |
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*/ |
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X(nop) |
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{ |
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} |
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/* |
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* call_pal: PALcode call |
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* |
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* arg[0] = pal nr |
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*/ |
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X(call_pal) |
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{ |
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/* Synchronize PC first: */ |
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uint64_t old_pc, low_pc = ((size_t)ic - (size_t) |
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cpu->cd.alpha.cur_ic_page) / sizeof(struct alpha_instr_call); |
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cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) << |
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ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT); |
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old_pc = cpu->pc; |
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alpha_palcode(cpu, ic->arg[0]); |
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if (!cpu->running) { |
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cpu->running_translated = 0; |
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cpu->n_translated_instrs --; |
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cpu->cd.alpha.next_ic = ¬hing_call; |
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} else if (cpu->pc != old_pc) { |
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/* The PC value was changed by the palcode call. */ |
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/* Find the new physical page and update the translation |
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pointers: */ |
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alpha_pc_to_pointers(cpu); |
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} |
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} |
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/* |
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* jsr: Jump to SubRoutine |
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* |
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* arg[0] = ptr to uint64_t where to store return PC |
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* arg[1] = ptr to uint64_t of new PC |
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*/ |
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X(jsr) |
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{ |
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uint64_t old_pc = cpu->pc, low_pc; |
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uint64_t mask_within_page = ((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT) | |
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((1 << ALPHA_INSTR_ALIGNMENT_SHIFT) - 1); |
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low_pc = ((size_t)ic - (size_t) |
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cpu->cd.alpha.cur_ic_page) / sizeof(struct alpha_instr_call); |
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cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT) + 4; |
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*((int64_t *)ic->arg[0]) = cpu->pc; |
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cpu->pc = *((int64_t *)ic->arg[1]); |
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/* |
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* If this is a jump/return into the same code page as we were |
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* already in, then just set cpu->cd.alpha.next_ic. |
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*/ |
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if ((old_pc & ~mask_within_page) == (cpu->pc & ~mask_within_page)) { |
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cpu->cd.alpha.next_ic = cpu->cd.alpha.cur_ic_page + |
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((cpu->pc & mask_within_page) >> 2); |
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} else { |
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/* Find the new physical page and update pointers: */ |
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alpha_pc_to_pointers(cpu); |
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} |
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} |
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/* |
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* jsr_trace: Jump to SubRoutine (with function call trace enabled) |
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* |
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* Arguments same as for jsr. |
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*/ |
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X(jsr_trace) |
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{ |
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cpu_functioncall_trace(cpu, *((int64_t *)ic->arg[1])); |
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instr(jsr)(cpu, ic); |
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} |
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/* |
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* jsr_0: JSR/RET, don't store return PC. |
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* |
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* arg[0] = ignored |
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* arg[1] = ptr to uint64_t of new PC |
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*/ |
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X(jsr_0) |
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{ |
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uint64_t old_pc = cpu->pc; |
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uint64_t mask_within_page = ((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT) |
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| ((1 << ALPHA_INSTR_ALIGNMENT_SHIFT) - 1); |
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cpu->pc = *((int64_t *)ic->arg[1]); |
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/* |
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* If this is a jump/return into the same code page as we were |
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* already in, then just set cpu->cd.alpha.next_ic. |
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*/ |
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if ((old_pc & ~mask_within_page) == (cpu->pc & ~mask_within_page)) { |
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cpu->cd.alpha.next_ic = cpu->cd.alpha.cur_ic_page + |
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((cpu->pc & mask_within_page) >> 2); |
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} else { |
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/* Find the new physical page and update pointers: */ |
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alpha_pc_to_pointers(cpu); |
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} |
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} |
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/* |
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* jsr_0_trace: JSR/RET (with function call trace enabled) |
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* |
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* Arguments same as for jsr_0. |
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*/ |
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X(jsr_0_trace) |
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{ |
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cpu_functioncall_trace_return(cpu); |
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instr(jsr_0)(cpu, ic); |
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} |
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/* |
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* br: Branch (to a different translated page) |
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* |
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* arg[0] = relative offset (as an int32_t) |
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*/ |
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X(br) |
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{ |
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uint64_t low_pc; |
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/* Calculate new PC from this instruction + arg[0] */ |
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low_pc = ((size_t)ic - (size_t) |
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cpu->cd.alpha.cur_ic_page) / sizeof(struct alpha_instr_call); |
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cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (int32_t)ic->arg[0]; |
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/* Find the new physical page and update the translation pointers: */ |
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alpha_pc_to_pointers(cpu); |
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} |
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/* |
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* br: Branch (to a different translated page), write return address |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to uint64_t where to write return address |
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*/ |
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X(br_return) |
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{ |
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uint64_t low_pc; |
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/* Calculate new PC from this instruction + arg[0] */ |
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low_pc = ((size_t)ic - (size_t) |
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cpu->cd.alpha.cur_ic_page) / sizeof(struct alpha_instr_call); |
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cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT); |
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/* ... but first, save away the return address: */ |
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*((int64_t *)ic->arg[1]) = cpu->pc + 4; |
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cpu->pc += (int32_t)ic->arg[0]; |
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/* Find the new physical page and update the translation pointers: */ |
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alpha_pc_to_pointers(cpu); |
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} |
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/* |
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* beq: Branch (to a different translated page) if Equal |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(beq) |
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{ |
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if (*((int64_t *)ic->arg[1]) == 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* blbs: Branch (to a different translated page) if Low Bit Set |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(blbs) |
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{ |
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if (*((int64_t *)ic->arg[1]) & 1) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* blbc: Branch (to a different translated page) if Low Bit Clear |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(blbc) |
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{ |
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if (!(*((int64_t *)ic->arg[1]) & 1)) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* bne: Branch (to a different translated page) if Not Equal |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(bne) |
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{ |
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if (*((int64_t *)ic->arg[1]) != 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* ble: Branch (to a different translated page) if Less or Equal |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(ble) |
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{ |
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if (*((int64_t *)ic->arg[1]) <= 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* blt: Branch (to a different translated page) if Less Than |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(blt) |
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{ |
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if (*((int64_t *)ic->arg[1]) < 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* bge: Branch (to a different translated page) if Greater or Equal |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(bge) |
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{ |
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if (*((int64_t *)ic->arg[1]) >= 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* bgt: Branch (to a different translated page) if Greater Than |
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* |
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* arg[0] = relative offset (as an int32_t) |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(bgt) |
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{ |
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if (*((int64_t *)ic->arg[1]) > 0) |
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instr(br)(cpu, ic); |
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} |
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/* |
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* br_samepage: Branch (to within the same translated page) |
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* |
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* arg[0] = pointer to new alpha_instr_call |
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*/ |
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X(br_samepage) |
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{ |
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cpu->cd.alpha.next_ic = (struct alpha_instr_call *) ic->arg[0]; |
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} |
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/* |
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* br_return_samepage: Branch (to within the same translated page), |
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* and save return address |
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* |
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* arg[0] = pointer to new alpha_instr_call |
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* arg[1] = pointer to uint64_t where to store return address |
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*/ |
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X(br_return_samepage) |
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{ |
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uint64_t low_pc; |
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low_pc = ((size_t)ic - (size_t) |
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cpu->cd.alpha.cur_ic_page) / sizeof(struct alpha_instr_call); |
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cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) |
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<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
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cpu->pc += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT); |
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*((int64_t *)ic->arg[1]) = cpu->pc + 4; |
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cpu->cd.alpha.next_ic = (struct alpha_instr_call *) ic->arg[0]; |
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} |
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351 |
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/* |
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* beq_samepage: Branch (to within the same translated page) if Equal |
354 |
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* |
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* arg[0] = pointer to new alpha_instr_call |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(beq_samepage) |
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{ |
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if (*((int64_t *)ic->arg[1]) == 0) |
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instr(br_samepage)(cpu, ic); |
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} |
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/* |
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* blbs_samepage: Branch (to within the same translated page) if Low Bit Set |
367 |
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* |
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* arg[0] = pointer to new alpha_instr_call |
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* arg[1] = pointer to int64_t register |
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*/ |
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X(blbs_samepage) |
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{ |
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if (*((int64_t *)ic->arg[1]) & 1) |
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instr(br_samepage)(cpu, ic); |
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} |
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377 |
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/* |
379 |
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* blbc_samepage: Branch (to within the same translated page) if Low Bit Clear |
380 |
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* |
381 |
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* arg[0] = pointer to new alpha_instr_call |
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* arg[1] = pointer to int64_t register |
383 |
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*/ |
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X(blbc_samepage) |
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{ |
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if (!(*((int64_t *)ic->arg[1]) & 1)) |
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instr(br_samepage)(cpu, ic); |
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} |
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391 |
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/* |
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* bne_samepage: Branch (to within the same translated page) if Not Equal |
393 |
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* |
394 |
|
|
* arg[0] = pointer to new alpha_instr_call |
395 |
|
|
* arg[1] = pointer to int64_t register |
396 |
|
|
*/ |
397 |
|
|
X(bne_samepage) |
398 |
|
|
{ |
399 |
|
|
if (*((int64_t *)ic->arg[1]) != 0) |
400 |
|
|
instr(br_samepage)(cpu, ic); |
401 |
|
|
} |
402 |
|
|
|
403 |
|
|
|
404 |
|
|
/* |
405 |
|
|
* ble_samepage: Branch (to within the same translated page) if Less or Equal |
406 |
|
|
* |
407 |
|
|
* arg[0] = pointer to new alpha_instr_call |
408 |
|
|
* arg[1] = pointer to int64_t register |
409 |
|
|
*/ |
410 |
|
|
X(ble_samepage) |
411 |
|
|
{ |
412 |
|
|
if (*((int64_t *)ic->arg[1]) <= 0) |
413 |
|
|
instr(br_samepage)(cpu, ic); |
414 |
|
|
} |
415 |
|
|
|
416 |
|
|
|
417 |
|
|
/* |
418 |
|
|
* blt_samepage: Branch (to within the same translated page) if Less Than |
419 |
|
|
* |
420 |
|
|
* arg[0] = pointer to new alpha_instr_call |
421 |
|
|
* arg[1] = pointer to int64_t register |
422 |
|
|
*/ |
423 |
|
|
X(blt_samepage) |
424 |
|
|
{ |
425 |
|
|
if (*((int64_t *)ic->arg[1]) < 0) |
426 |
|
|
instr(br_samepage)(cpu, ic); |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
|
430 |
|
|
/* |
431 |
|
|
* bge_samepage: Branch (to within the same translated page) |
432 |
|
|
* if Greater or Equal |
433 |
|
|
* |
434 |
|
|
* arg[0] = pointer to new alpha_instr_call |
435 |
|
|
* arg[1] = pointer to int64_t register |
436 |
|
|
*/ |
437 |
|
|
X(bge_samepage) |
438 |
|
|
{ |
439 |
|
|
if (*((int64_t *)ic->arg[1]) >= 0) |
440 |
|
|
instr(br_samepage)(cpu, ic); |
441 |
|
|
} |
442 |
|
|
|
443 |
|
|
|
444 |
|
|
/* |
445 |
|
|
* bgt_samepage: Branch (to within the same translated page) if Greater Than |
446 |
|
|
* |
447 |
|
|
* arg[0] = pointer to new alpha_instr_call |
448 |
|
|
* arg[1] = pointer to int64_t register |
449 |
|
|
*/ |
450 |
|
|
X(bgt_samepage) |
451 |
|
|
{ |
452 |
|
|
if (*((int64_t *)ic->arg[1]) > 0) |
453 |
|
|
instr(br_samepage)(cpu, ic); |
454 |
|
|
} |
455 |
|
|
|
456 |
|
|
|
457 |
|
|
/* |
458 |
|
|
* mull: Signed Multiply 32x32 => 32. |
459 |
|
|
* |
460 |
|
|
* arg[0] = pointer to destination uint64_t |
461 |
|
|
* arg[1] = pointer to source uint64_t |
462 |
|
|
* arg[2] = pointer to source uint64_t |
463 |
|
|
*/ |
464 |
|
|
X(mull) |
465 |
|
|
{ |
466 |
|
|
int32_t a = reg(ic->arg[1]); |
467 |
|
|
int32_t b = reg(ic->arg[2]); |
468 |
|
|
reg(ic->arg[0]) = (int64_t)(int32_t)(a * b); |
469 |
|
|
} |
470 |
|
|
|
471 |
|
|
|
472 |
|
|
/* |
473 |
|
|
* mulq: Unsigned Multiply 64x64 => 64. |
474 |
|
|
* |
475 |
|
|
* arg[0] = pointer to destination uint64_t |
476 |
|
|
* arg[1] = pointer to source uint64_t |
477 |
|
|
* arg[2] = pointer to source uint64_t |
478 |
|
|
*/ |
479 |
|
|
X(mulq) |
480 |
|
|
{ |
481 |
|
|
reg(ic->arg[0]) = reg(ic->arg[1]) * reg(ic->arg[2]); |
482 |
|
|
} |
483 |
|
|
|
484 |
|
|
|
485 |
|
|
/* |
486 |
|
|
* umulh: Unsigned Multiply 64x64 => 128. Store high part in dest reg. |
487 |
|
|
* |
488 |
|
|
* arg[0] = pointer to destination uint64_t |
489 |
|
|
* arg[1] = pointer to source uint64_t |
490 |
|
|
* arg[2] = pointer to source uint64_t |
491 |
|
|
*/ |
492 |
|
|
X(umulh) |
493 |
|
|
{ |
494 |
|
|
uint64_t reshi = 0, reslo = 0; |
495 |
|
|
uint64_t s1 = reg(ic->arg[1]), s2 = reg(ic->arg[2]); |
496 |
|
|
int i, bit; |
497 |
|
|
|
498 |
|
|
for (i=0; i<64; i++) { |
499 |
|
|
bit = (s1 & 0x8000000000000000ULL)? 1 : 0; |
500 |
|
|
s1 <<= 1; |
501 |
|
|
|
502 |
|
|
/* If bit in s1 set, then add s2 to reshi/lo: */ |
503 |
|
|
if (bit) { |
504 |
|
|
uint64_t old_reslo = reslo; |
505 |
|
|
reslo += s2; |
506 |
|
|
if (reslo < old_reslo) |
507 |
|
|
reshi ++; |
508 |
|
|
} |
509 |
|
|
|
510 |
|
|
if (i != 63) { |
511 |
|
|
reshi <<= 1; |
512 |
|
|
reshi += (reslo & 0x8000000000000000ULL? 1 : 0); |
513 |
|
|
reslo <<= 1; |
514 |
|
|
} |
515 |
|
|
} |
516 |
|
|
|
517 |
|
|
reg(ic->arg[0]) = reshi; |
518 |
|
|
} |
519 |
|
|
|
520 |
|
|
|
521 |
|
|
/* |
522 |
|
|
* lda: Load address. |
523 |
|
|
* |
524 |
|
|
* arg[0] = pointer to destination uint64_t |
525 |
|
|
* arg[1] = pointer to source uint64_t |
526 |
|
|
* arg[2] = offset (possibly as an int32_t) |
527 |
|
|
*/ |
528 |
|
|
X(lda) |
529 |
|
|
{ |
530 |
|
|
reg(ic->arg[0]) = reg(ic->arg[1]) + (int64_t)(int32_t)ic->arg[2]; |
531 |
|
|
} |
532 |
|
|
|
533 |
|
|
|
534 |
|
|
/* |
535 |
|
|
* lda_0: Load address compared to the zero register. |
536 |
|
|
* |
537 |
|
|
* arg[0] = pointer to destination uint64_t |
538 |
|
|
* arg[1] = ignored |
539 |
|
|
* arg[2] = offset (possibly as an int32_t) |
540 |
|
|
*/ |
541 |
|
|
X(lda_0) |
542 |
|
|
{ |
543 |
|
|
reg(ic->arg[0]) = (int64_t)(int32_t)ic->arg[2]; |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
|
547 |
|
|
/* |
548 |
|
|
* clear: Clear a 64-bit register. |
549 |
|
|
* |
550 |
|
|
* arg[0] = pointer to destination uint64_t |
551 |
|
|
*/ |
552 |
|
|
X(clear) |
553 |
|
|
{ |
554 |
|
|
reg(ic->arg[0]) = 0; |
555 |
|
|
} |
556 |
|
|
|
557 |
|
|
|
558 |
|
|
/* |
559 |
|
|
* rdcc: Read the Cycle Counter into a 64-bit register. |
560 |
|
|
* |
561 |
|
|
* arg[0] = pointer to destination uint64_t |
562 |
|
|
*/ |
563 |
|
|
X(rdcc) |
564 |
|
|
{ |
565 |
|
|
reg(ic->arg[0]) = cpu->cd.alpha.pcc; |
566 |
|
|
|
567 |
|
|
/* TODO: actually keep the pcc updated! */ |
568 |
|
|
cpu->cd.alpha.pcc += 20; |
569 |
|
|
} |
570 |
|
|
|
571 |
|
|
|
572 |
|
|
#include "tmp_alpha_misc.c" |
573 |
|
|
|
574 |
|
|
|
575 |
|
|
/*****************************************************************************/ |
576 |
|
|
|
577 |
|
|
|
578 |
|
|
X(end_of_page) |
579 |
|
|
{ |
580 |
|
|
/* Update the PC: (offset 0, but on the next page) */ |
581 |
|
|
cpu->pc &= ~((ALPHA_IC_ENTRIES_PER_PAGE-1) |
582 |
|
|
<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
583 |
|
|
cpu->pc += (ALPHA_IC_ENTRIES_PER_PAGE |
584 |
|
|
<< ALPHA_INSTR_ALIGNMENT_SHIFT); |
585 |
|
|
|
586 |
|
|
/* Find the new physical page and update the translation pointers: */ |
587 |
|
|
alpha_pc_to_pointers(cpu); |
588 |
|
|
|
589 |
|
|
/* end_of_page doesn't count as an executed instruction: */ |
590 |
|
|
cpu->n_translated_instrs --; |
591 |
|
|
} |
592 |
|
|
|
593 |
|
|
|
594 |
|
|
/*****************************************************************************/ |
595 |
|
|
|
596 |
|
|
|
597 |
|
|
/* |
598 |
|
|
* alpha_combine_instructions(): |
599 |
|
|
* |
600 |
|
|
* Combine two or more instructions, if possible, into a single function call. |
601 |
|
|
*/ |
602 |
|
|
void alpha_combine_instructions(struct cpu *cpu, struct alpha_instr_call *ic, |
603 |
|
|
uint64_t addr) |
604 |
|
|
{ |
605 |
|
|
int n_back; |
606 |
|
|
n_back = (addr >> 2) & (ALPHA_IC_ENTRIES_PER_PAGE-1); |
607 |
|
|
|
608 |
|
|
if (n_back >= 1) { |
609 |
|
|
} |
610 |
|
|
|
611 |
|
|
/* TODO: Combine forward as well */ |
612 |
|
|
} |
613 |
|
|
|
614 |
|
|
|
615 |
|
|
/*****************************************************************************/ |
616 |
|
|
|
617 |
|
|
|
618 |
|
|
/* |
619 |
|
|
* alpha_instr_to_be_translated(): |
620 |
|
|
* |
621 |
|
|
* Translate an instruction word into an alpha_instr_call. ic is filled in with |
622 |
|
|
* valid data for the translated instruction, or a "nothing" instruction if |
623 |
|
|
* there was a translation failure. The newly translated instruction is then |
624 |
|
|
* executed. |
625 |
|
|
*/ |
626 |
|
|
X(to_be_translated) |
627 |
|
|
{ |
628 |
|
|
uint64_t addr, low_pc; |
629 |
|
|
uint32_t iword; |
630 |
|
|
struct alpha_vph_page *vph_p; |
631 |
|
|
unsigned char *page; |
632 |
|
|
unsigned char ib[4]; |
633 |
|
|
void (*samepage_function)(struct cpu *, struct alpha_instr_call *); |
634 |
|
|
int opcode, ra, rb, func, rc, imm, load, loadstore_type, fp, llsc; |
635 |
|
|
|
636 |
|
|
/* Figure out the (virtual) address of the instruction: */ |
637 |
|
|
low_pc = ((size_t)ic - (size_t)cpu->cd.alpha.cur_ic_page) |
638 |
|
|
/ sizeof(struct alpha_instr_call); |
639 |
|
|
addr = cpu->pc & ~((ALPHA_IC_ENTRIES_PER_PAGE-1) << |
640 |
|
|
ALPHA_INSTR_ALIGNMENT_SHIFT); |
641 |
|
|
addr += (low_pc << ALPHA_INSTR_ALIGNMENT_SHIFT); |
642 |
|
|
addr &= ~((1 << ALPHA_INSTR_ALIGNMENT_SHIFT) - 1); |
643 |
|
|
cpu->pc = addr; |
644 |
|
|
|
645 |
|
|
/* Read the instruction word from memory: */ |
646 |
|
|
if ((addr >> ALPHA_TOPSHIFT) == 0) { |
647 |
|
|
vph_p = cpu->cd.alpha.vph_table0[(addr >> |
648 |
|
|
ALPHA_LEVEL0_SHIFT) & 8191]; |
649 |
|
|
page = vph_p->host_load[(addr >> ALPHA_LEVEL1_SHIFT) & 8191]; |
650 |
|
|
} else if ((addr >> ALPHA_TOPSHIFT) == ALPHA_TOP_KERNEL) { |
651 |
|
|
vph_p = cpu->cd.alpha.vph_table0_kernel[(addr >> |
652 |
|
|
ALPHA_LEVEL0_SHIFT) & 8191]; |
653 |
|
|
page = vph_p->host_load[(addr >> ALPHA_LEVEL1_SHIFT) & 8191]; |
654 |
|
|
} else |
655 |
|
|
page = NULL; |
656 |
|
|
|
657 |
|
|
if (page != NULL) { |
658 |
|
|
/* fatal("TRANSLATION HIT!\n"); */ |
659 |
|
|
memcpy(ib, page + (addr & 8191), sizeof(ib)); |
660 |
|
|
} else { |
661 |
|
|
/* fatal("TRANSLATION MISS!\n"); */ |
662 |
|
|
if (!cpu->memory_rw(cpu, cpu->mem, addr, &ib[0], |
663 |
|
|
sizeof(ib), MEM_READ, CACHE_INSTRUCTION)) { |
664 |
|
|
fatal("to_be_translated(): read failed: TODO\n"); |
665 |
|
|
goto bad; |
666 |
|
|
} |
667 |
|
|
} |
668 |
|
|
|
669 |
|
|
#ifdef HOST_LITTLE_ENDIAN |
670 |
|
|
iword = *((uint32_t *)&ib[0]); |
671 |
|
|
#else |
672 |
|
|
iword = ib[0] + (ib[1]<<8) + (ib[2]<<16) + (ib[3]<<24); |
673 |
|
|
#endif |
674 |
|
|
|
675 |
|
|
/* fatal("{ Alpha: translating pc=0x%016llx iword=0x%08x }\n", |
676 |
|
|
(long long)addr, (int)iword); */ |
677 |
|
|
|
678 |
|
|
|
679 |
|
|
#define DYNTRANS_TO_BE_TRANSLATED_HEAD |
680 |
|
|
#include "cpu_dyntrans.c" |
681 |
|
|
#undef DYNTRANS_TO_BE_TRANSLATED_HEAD |
682 |
|
|
|
683 |
|
|
|
684 |
|
|
opcode = (iword >> 26) & 63; |
685 |
|
|
ra = (iword >> 21) & 31; |
686 |
|
|
rb = (iword >> 16) & 31; |
687 |
|
|
func = (iword >> 5) & 0x7ff; |
688 |
|
|
rc = iword & 31; |
689 |
|
|
imm = iword & 0xffff; |
690 |
|
|
|
691 |
|
|
switch (opcode) { |
692 |
|
|
case 0x00: /* CALL_PAL */ |
693 |
|
|
ic->f = instr(call_pal); |
694 |
|
|
ic->arg[0] = (size_t) (iword & 0x3ffffff); |
695 |
|
|
break; |
696 |
|
|
case 0x08: /* LDA */ |
697 |
|
|
case 0x09: /* LDAH */ |
698 |
|
|
if (ra == ALPHA_ZERO) { |
699 |
|
|
ic->f = instr(nop); |
700 |
|
|
break; |
701 |
|
|
} |
702 |
|
|
/* TODO: A special case which is common is to add or subtract |
703 |
|
|
a small offset from sp. */ |
704 |
|
|
ic->f = instr(lda); |
705 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[ra]; |
706 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[rb]; |
707 |
|
|
if (rb == ALPHA_ZERO) |
708 |
|
|
ic->f = instr(lda_0); |
709 |
|
|
ic->arg[2] = (ssize_t)(int16_t)imm; |
710 |
|
|
if (opcode == 0x09) |
711 |
|
|
ic->arg[2] <<= 16; |
712 |
|
|
break; |
713 |
|
|
case 0x0b: /* LDQ_U */ |
714 |
|
|
case 0x0f: /* STQ_U */ |
715 |
|
|
if (ra == ALPHA_ZERO && opcode == 0x0b) { |
716 |
|
|
ic->f = instr(nop); |
717 |
|
|
break; |
718 |
|
|
} |
719 |
|
|
if (opcode == 0x0b) |
720 |
|
|
ic->f = instr(ldq_u); |
721 |
|
|
else |
722 |
|
|
ic->f = instr(stq_u); |
723 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[ra]; |
724 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[rb]; |
725 |
|
|
ic->arg[2] = (ssize_t)(int16_t)imm; |
726 |
|
|
break; |
727 |
|
|
case 0x0a: |
728 |
|
|
case 0x0c: |
729 |
|
|
case 0x0d: |
730 |
|
|
case 0x0e: |
731 |
|
|
case 0x22: |
732 |
|
|
case 0x23: |
733 |
|
|
case 0x26: |
734 |
|
|
case 0x27: |
735 |
|
|
case 0x28: |
736 |
|
|
case 0x29: |
737 |
|
|
case 0x2a: |
738 |
|
|
case 0x2b: |
739 |
|
|
case 0x2c: |
740 |
|
|
case 0x2d: |
741 |
|
|
case 0x2e: |
742 |
|
|
case 0x2f: |
743 |
|
|
loadstore_type = 0; fp = 0; load = 0; llsc = 0; |
744 |
|
|
switch (opcode) { |
745 |
|
|
case 0x0a: loadstore_type = 0; load = 1; break; /* ldbu */ |
746 |
|
|
case 0x0c: loadstore_type = 1; load = 1; break; /* ldwu */ |
747 |
|
|
case 0x0d: loadstore_type = 1; break; /* stw */ |
748 |
|
|
case 0x0e: loadstore_type = 0; break; /* stb */ |
749 |
|
|
case 0x22: loadstore_type = 2; load = 1; fp = 1; break; /*lds*/ |
750 |
|
|
case 0x23: loadstore_type = 3; load = 1; fp = 1; break; /*ldt*/ |
751 |
|
|
case 0x26: loadstore_type = 2; fp = 1; break; /* sts */ |
752 |
|
|
case 0x27: loadstore_type = 3; fp = 1; break; /* stt */ |
753 |
|
|
case 0x28: loadstore_type = 2; load = 1; break; /* ldl */ |
754 |
|
|
case 0x29: loadstore_type = 3; load = 1; break; /* ldq */ |
755 |
|
|
case 0x2a: loadstore_type = 2; load = llsc = 1; break;/* ldl_l*/ |
756 |
|
|
case 0x2b: loadstore_type = 3; load = llsc = 1; break;/* ldq_l*/ |
757 |
|
|
case 0x2c: loadstore_type = 2; break; /* stl */ |
758 |
|
|
case 0x2d: loadstore_type = 3; break; /* stq */ |
759 |
|
|
case 0x2e: loadstore_type = 2; llsc = 1; break; /* stl_c */ |
760 |
|
|
case 0x2f: loadstore_type = 3; llsc = 1; break; /* stq_c */ |
761 |
|
|
} |
762 |
|
|
ic->f = alpha_loadstore[ |
763 |
|
|
loadstore_type + (imm==0? 4 : 0) + 8 * load |
764 |
|
|
+ (cpu->machine->dyntrans_alignment_check? 16:0) |
765 |
|
|
+ 32 * llsc]; |
766 |
|
|
/* Load to the zero register is treated as a prefetch |
767 |
|
|
hint. It is ignored here. */ |
768 |
|
|
if (load && ra == ALPHA_ZERO) { |
769 |
|
|
ic->f = instr(nop); |
770 |
|
|
break; |
771 |
|
|
} |
772 |
|
|
if (fp) |
773 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.f[ra]; |
774 |
|
|
else |
775 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[ra]; |
776 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[rb]; |
777 |
|
|
ic->arg[2] = (ssize_t)(int16_t)imm; |
778 |
|
|
break; |
779 |
|
|
case 0x10: |
780 |
|
|
if (rc == ALPHA_ZERO) { |
781 |
|
|
ic->f = instr(nop); |
782 |
|
|
break; |
783 |
|
|
} |
784 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[rc]; |
785 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[ra]; |
786 |
|
|
if (func & 0x80) |
787 |
|
|
ic->arg[2] = (size_t)((rb << 3) + (func >> 8)); |
788 |
|
|
else |
789 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.r[rb]; |
790 |
|
|
switch (func & 0xff) { |
791 |
|
|
case 0x00: ic->f = instr(addl); break; |
792 |
|
|
case 0x02: ic->f = instr(s4addl); break; |
793 |
|
|
case 0x09: ic->f = instr(subl); break; |
794 |
|
|
case 0x0b: ic->f = instr(s4subl); break; |
795 |
|
|
case 0x12: ic->f = instr(s8addl); break; |
796 |
|
|
case 0x1b: ic->f = instr(s8subl); break; |
797 |
|
|
case 0x1d: ic->f = instr(cmpult); break; |
798 |
|
|
case 0x20: ic->f = instr(addq); break; |
799 |
|
|
case 0x22: ic->f = instr(s4addq); break; |
800 |
|
|
case 0x29: ic->f = instr(subq); break; |
801 |
|
|
case 0x2b: ic->f = instr(s4subq); break; |
802 |
|
|
case 0x2d: ic->f = instr(cmpeq); break; |
803 |
|
|
case 0x32: ic->f = instr(s8addq); break; |
804 |
|
|
case 0x3b: ic->f = instr(s8subq); break; |
805 |
|
|
case 0x3d: ic->f = instr(cmpule); break; |
806 |
|
|
case 0x4d: ic->f = instr(cmplt); break; |
807 |
|
|
case 0x6d: ic->f = instr(cmple); break; |
808 |
|
|
|
809 |
|
|
case 0x80: ic->f = instr(addl_imm); break; |
810 |
|
|
case 0x82: ic->f = instr(s4addl_imm); break; |
811 |
|
|
case 0x89: ic->f = instr(subl_imm); break; |
812 |
|
|
case 0x8b: ic->f = instr(s4subl_imm); break; |
813 |
|
|
case 0x92: ic->f = instr(s8addl_imm); break; |
814 |
|
|
case 0x9b: ic->f = instr(s8subl_imm); break; |
815 |
|
|
case 0x9d: ic->f = instr(cmpult_imm); break; |
816 |
|
|
case 0xa0: ic->f = instr(addq_imm); break; |
817 |
|
|
case 0xa2: ic->f = instr(s4addq_imm); break; |
818 |
|
|
case 0xa9: ic->f = instr(subq_imm); break; |
819 |
|
|
case 0xab: ic->f = instr(s4subq_imm); break; |
820 |
|
|
case 0xad: ic->f = instr(cmpeq_imm); break; |
821 |
|
|
case 0xb2: ic->f = instr(s8addq_imm); break; |
822 |
|
|
case 0xbb: ic->f = instr(s8subq_imm); break; |
823 |
|
|
case 0xbd: ic->f = instr(cmpule_imm); break; |
824 |
|
|
case 0xcd: ic->f = instr(cmplt_imm); break; |
825 |
|
|
case 0xed: ic->f = instr(cmple_imm); break; |
826 |
|
|
|
827 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
828 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
829 |
|
|
goto bad; |
830 |
|
|
} |
831 |
|
|
break; |
832 |
|
|
case 0x11: |
833 |
|
|
if (rc == ALPHA_ZERO) { |
834 |
|
|
ic->f = instr(nop); |
835 |
|
|
break; |
836 |
|
|
} |
837 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[rc]; |
838 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[ra]; |
839 |
|
|
if (func & 0x80) |
840 |
|
|
ic->arg[2] = (size_t)((rb << 3) + (func >> 8)); |
841 |
|
|
else |
842 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.r[rb]; |
843 |
|
|
switch (func & 0xff) { |
844 |
|
|
case 0x00: ic->f = instr(and); break; |
845 |
|
|
case 0x08: ic->f = instr(andnot); break; |
846 |
|
|
case 0x14: ic->f = instr(cmovlbs); break; |
847 |
|
|
case 0x16: ic->f = instr(cmovlbc); break; |
848 |
|
|
case 0x20: ic->f = instr(or); |
849 |
|
|
if (ra == ALPHA_ZERO || rb == ALPHA_ZERO) { |
850 |
|
|
if (ra == ALPHA_ZERO) |
851 |
|
|
ra = rb; |
852 |
|
|
ic->f = alpha_mov_r_r[ra + rc*32]; |
853 |
|
|
} |
854 |
|
|
break; |
855 |
|
|
case 0x24: ic->f = instr(cmoveq); break; |
856 |
|
|
case 0x26: ic->f = instr(cmovne); break; |
857 |
|
|
case 0x28: ic->f = instr(ornot); break; |
858 |
|
|
case 0x40: ic->f = instr(xor); break; |
859 |
|
|
case 0x44: ic->f = instr(cmovlt); break; |
860 |
|
|
case 0x46: ic->f = instr(cmovge); break; |
861 |
|
|
case 0x48: ic->f = instr(xornot); break; |
862 |
|
|
case 0x64: ic->f = instr(cmovle); break; |
863 |
|
|
case 0x66: ic->f = instr(cmovgt); break; |
864 |
|
|
case 0x80: ic->f = instr(and_imm); break; |
865 |
|
|
case 0x88: ic->f = instr(andnot_imm); break; |
866 |
|
|
case 0x94: ic->f = instr(cmovlbs_imm); break; |
867 |
|
|
case 0x96: ic->f = instr(cmovlbc_imm); break; |
868 |
|
|
case 0xa0: ic->f = instr(or_imm); break; |
869 |
|
|
case 0xa4: ic->f = instr(cmoveq_imm); break; |
870 |
|
|
case 0xa6: ic->f = instr(cmovne_imm); break; |
871 |
|
|
case 0xa8: ic->f = instr(ornot_imm); break; |
872 |
|
|
case 0xc0: ic->f = instr(xor_imm); break; |
873 |
|
|
case 0xc4: ic->f = instr(cmovlt_imm); break; |
874 |
|
|
case 0xc6: ic->f = instr(cmovge_imm); break; |
875 |
|
|
case 0xc8: ic->f = instr(xornot_imm); break; |
876 |
|
|
case 0xe4: ic->f = instr(cmovle_imm); break; |
877 |
|
|
case 0xe6: ic->f = instr(cmovgt_imm); break; |
878 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
879 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
880 |
|
|
goto bad; |
881 |
|
|
} |
882 |
|
|
break; |
883 |
|
|
case 0x12: |
884 |
|
|
if (rc == ALPHA_ZERO) { |
885 |
|
|
ic->f = instr(nop); |
886 |
|
|
break; |
887 |
|
|
} |
888 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[rc]; |
889 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[ra]; |
890 |
|
|
if (func & 0x80) |
891 |
|
|
ic->arg[2] = (size_t)((rb << 3) + (func >> 8)); |
892 |
|
|
else |
893 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.r[rb]; |
894 |
|
|
switch (func & 0xff) { |
895 |
|
|
case 0x02: ic->f = instr(mskbl); break; |
896 |
|
|
case 0x06: ic->f = instr(extbl); break; |
897 |
|
|
case 0x0b: ic->f = instr(insbl); break; |
898 |
|
|
case 0x12: ic->f = instr(mskwl); break; |
899 |
|
|
case 0x16: ic->f = instr(extwl); break; |
900 |
|
|
case 0x1b: ic->f = instr(inswl); break; |
901 |
|
|
case 0x22: ic->f = instr(mskll); break; |
902 |
|
|
case 0x26: ic->f = instr(extll); break; |
903 |
|
|
case 0x2b: ic->f = instr(insll); break; |
904 |
|
|
case 0x30: ic->f = instr(zap); break; |
905 |
|
|
case 0x31: ic->f = instr(zapnot); break; |
906 |
|
|
case 0x32: ic->f = instr(mskql); break; |
907 |
|
|
case 0x34: ic->f = instr(srl); break; |
908 |
|
|
case 0x36: ic->f = instr(extql); break; |
909 |
|
|
case 0x39: ic->f = instr(sll); break; |
910 |
|
|
case 0x3b: ic->f = instr(insql); break; |
911 |
|
|
case 0x3c: ic->f = instr(sra); break; |
912 |
|
|
case 0x52: ic->f = instr(mskwh); break; |
913 |
|
|
case 0x57: ic->f = instr(inswh); break; |
914 |
|
|
case 0x5a: ic->f = instr(extwh); break; |
915 |
|
|
case 0x62: ic->f = instr(msklh); break; |
916 |
|
|
case 0x67: ic->f = instr(inslh); break; |
917 |
|
|
case 0x6a: ic->f = instr(extlh); break; |
918 |
|
|
case 0x72: ic->f = instr(mskqh); break; |
919 |
|
|
case 0x77: ic->f = instr(insqh); break; |
920 |
|
|
case 0x7a: ic->f = instr(extqh); break; |
921 |
|
|
case 0x82: ic->f = instr(mskbl_imm); break; |
922 |
|
|
case 0x86: ic->f = instr(extbl_imm); break; |
923 |
|
|
case 0x8b: ic->f = instr(insbl_imm); break; |
924 |
|
|
case 0x92: ic->f = instr(mskwl_imm); break; |
925 |
|
|
case 0x96: ic->f = instr(extwl_imm); break; |
926 |
|
|
case 0x9b: ic->f = instr(inswl_imm); break; |
927 |
|
|
case 0xa2: ic->f = instr(mskll_imm); break; |
928 |
|
|
case 0xa6: ic->f = instr(extll_imm); break; |
929 |
|
|
case 0xab: ic->f = instr(insll_imm); break; |
930 |
|
|
case 0xb0: ic->f = instr(zap_imm); break; |
931 |
|
|
case 0xb1: ic->f = instr(zapnot_imm); break; |
932 |
|
|
case 0xb2: ic->f = instr(mskql_imm); break; |
933 |
|
|
case 0xb4: ic->f = instr(srl_imm); break; |
934 |
|
|
case 0xb6: ic->f = instr(extql_imm); break; |
935 |
|
|
case 0xb9: ic->f = instr(sll_imm); break; |
936 |
|
|
case 0xbb: ic->f = instr(insql_imm); break; |
937 |
|
|
case 0xbc: ic->f = instr(sra_imm); break; |
938 |
|
|
case 0xd2: ic->f = instr(mskwh_imm); break; |
939 |
|
|
case 0xd7: ic->f = instr(inswh_imm); break; |
940 |
|
|
case 0xda: ic->f = instr(extwh_imm); break; |
941 |
|
|
case 0xe2: ic->f = instr(msklh_imm); break; |
942 |
|
|
case 0xe7: ic->f = instr(inslh_imm); break; |
943 |
|
|
case 0xea: ic->f = instr(extlh_imm); break; |
944 |
|
|
case 0xf2: ic->f = instr(mskqh_imm); break; |
945 |
|
|
case 0xf7: ic->f = instr(insqh_imm); break; |
946 |
|
|
case 0xfa: ic->f = instr(extqh_imm); break; |
947 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
948 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
949 |
|
|
goto bad; |
950 |
|
|
} |
951 |
|
|
break; |
952 |
|
|
case 0x13: |
953 |
|
|
if (rc == ALPHA_ZERO) { |
954 |
|
|
ic->f = instr(nop); |
955 |
|
|
break; |
956 |
|
|
} |
957 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[rc]; |
958 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[ra]; |
959 |
|
|
if (func & 0x80) |
960 |
|
|
ic->arg[2] = (size_t)((rb << 3) + (func >> 8)); |
961 |
|
|
else |
962 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.r[rb]; |
963 |
|
|
switch (func & 0xff) { |
964 |
|
|
case 0x00: ic->f = instr(mull); break; |
965 |
|
|
case 0x20: ic->f = instr(mulq); break; |
966 |
|
|
case 0x30: ic->f = instr(umulh); break; |
967 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
968 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
969 |
|
|
goto bad; |
970 |
|
|
} |
971 |
|
|
break; |
972 |
|
|
case 0x16: |
973 |
|
|
if (rc == ALPHA_ZERO) { |
974 |
|
|
ic->f = instr(nop); |
975 |
|
|
break; |
976 |
|
|
} |
977 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.f[rc]; |
978 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.f[ra]; |
979 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.f[rb]; |
980 |
|
|
switch (func & 0x7ff) { |
981 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
982 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
983 |
|
|
goto bad; |
984 |
|
|
} |
985 |
|
|
break; |
986 |
|
|
case 0x17: |
987 |
|
|
if (rc == ALPHA_ZERO) { |
988 |
|
|
ic->f = instr(nop); |
989 |
|
|
break; |
990 |
|
|
} |
991 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.f[rc]; |
992 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.f[ra]; |
993 |
|
|
ic->arg[2] = (size_t) &cpu->cd.alpha.f[rb]; |
994 |
|
|
switch (func & 0x7ff) { |
995 |
|
|
case 0x020: |
996 |
|
|
/* fclr: */ |
997 |
|
|
if (ra == 31 && rb == 31) |
998 |
|
|
ic->f = instr(clear); |
999 |
|
|
else { |
1000 |
|
|
/* fabs: */ |
1001 |
|
|
goto bad; |
1002 |
|
|
} |
1003 |
|
|
break; |
1004 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
1005 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
1006 |
|
|
goto bad; |
1007 |
|
|
} |
1008 |
|
|
break; |
1009 |
|
|
case 0x18: |
1010 |
|
|
switch (iword & 0xffff) { |
1011 |
|
|
case 0x4000: /* mb */ |
1012 |
|
|
case 0x4400: /* wmb */ |
1013 |
|
|
ic->f = instr(nop); |
1014 |
|
|
break; |
1015 |
|
|
case 0xc000: /* rdcc ra */ |
1016 |
|
|
if (ra == ALPHA_ZERO) { |
1017 |
|
|
ic->f = instr(nop); |
1018 |
|
|
break; |
1019 |
|
|
} |
1020 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[ra]; |
1021 |
|
|
ic->f = instr(rdcc); |
1022 |
|
|
break; |
1023 |
|
|
default:fatal("[ Alpha: unimplemented function 0x%03x for" |
1024 |
|
|
" opcode 0x%02x ]\n", func, opcode); |
1025 |
|
|
goto bad; |
1026 |
|
|
} |
1027 |
|
|
break; |
1028 |
|
|
case 0x1a: |
1029 |
|
|
switch ((iword >> 14) & 3) { |
1030 |
|
|
case 0: /* JMP */ |
1031 |
|
|
case 1: /* JSR */ |
1032 |
|
|
case 2: /* RET */ |
1033 |
|
|
ic->arg[0] = (size_t) &cpu->cd.alpha.r[ra]; |
1034 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[rb]; |
1035 |
|
|
if (ra == ALPHA_ZERO) { |
1036 |
|
|
if (cpu->machine->show_trace_tree && |
1037 |
|
|
rb == ALPHA_RA) |
1038 |
|
|
ic->f = instr(jsr_0_trace); |
1039 |
|
|
else |
1040 |
|
|
ic->f = instr(jsr_0); |
1041 |
|
|
} else { |
1042 |
|
|
if (cpu->machine->show_trace_tree) |
1043 |
|
|
ic->f = instr(jsr_trace); |
1044 |
|
|
else |
1045 |
|
|
ic->f = instr(jsr); |
1046 |
|
|
} |
1047 |
|
|
break; |
1048 |
|
|
default:fatal("[ Alpha: unimpl JSR type %i, ra=%i rb=%i ]\n", |
1049 |
|
|
((iword >> 14) & 3), ra, rb); |
1050 |
|
|
goto bad; |
1051 |
|
|
} |
1052 |
|
|
break; |
1053 |
|
|
case 0x30: /* BR */ |
1054 |
|
|
case 0x34: /* BSR */ |
1055 |
|
|
case 0x38: /* BLBC */ |
1056 |
|
|
case 0x39: /* BEQ */ |
1057 |
|
|
case 0x3a: /* BLT */ |
1058 |
|
|
case 0x3b: /* BLE */ |
1059 |
|
|
case 0x3c: /* BLBS */ |
1060 |
|
|
case 0x3d: /* BNE */ |
1061 |
|
|
case 0x3e: /* BGE */ |
1062 |
|
|
case 0x3f: /* BGT */ |
1063 |
|
|
/* To avoid a GCC warning: */ |
1064 |
|
|
samepage_function = instr(nop); |
1065 |
|
|
switch (opcode) { |
1066 |
|
|
case 0x30: |
1067 |
|
|
case 0x34: |
1068 |
|
|
ic->f = instr(br); |
1069 |
|
|
samepage_function = instr(br_samepage); |
1070 |
|
|
if (ra != ALPHA_ZERO) { |
1071 |
|
|
ic->f = instr(br_return); |
1072 |
|
|
samepage_function = instr(br_return_samepage); |
1073 |
|
|
} |
1074 |
|
|
break; |
1075 |
|
|
case 0x38: |
1076 |
|
|
ic->f = instr(blbc); |
1077 |
|
|
samepage_function = instr(blbc_samepage); |
1078 |
|
|
break; |
1079 |
|
|
case 0x39: |
1080 |
|
|
ic->f = instr(beq); |
1081 |
|
|
samepage_function = instr(beq_samepage); |
1082 |
|
|
break; |
1083 |
|
|
case 0x3a: |
1084 |
|
|
ic->f = instr(blt); |
1085 |
|
|
samepage_function = instr(blt_samepage); |
1086 |
|
|
break; |
1087 |
|
|
case 0x3b: |
1088 |
|
|
ic->f = instr(ble); |
1089 |
|
|
samepage_function = instr(ble_samepage); |
1090 |
|
|
break; |
1091 |
|
|
case 0x3c: |
1092 |
|
|
ic->f = instr(blbs); |
1093 |
|
|
samepage_function = instr(blbs_samepage); |
1094 |
|
|
break; |
1095 |
|
|
case 0x3d: |
1096 |
|
|
ic->f = instr(bne); |
1097 |
|
|
samepage_function = instr(bne_samepage); |
1098 |
|
|
break; |
1099 |
|
|
case 0x3e: |
1100 |
|
|
ic->f = instr(bge); |
1101 |
|
|
samepage_function = instr(bge_samepage); |
1102 |
|
|
break; |
1103 |
|
|
case 0x3f: |
1104 |
|
|
ic->f = instr(bgt); |
1105 |
|
|
samepage_function = instr(bgt_samepage); |
1106 |
|
|
break; |
1107 |
|
|
} |
1108 |
|
|
ic->arg[1] = (size_t) &cpu->cd.alpha.r[ra]; |
1109 |
|
|
ic->arg[0] = (iword & 0x001fffff) << 2; |
1110 |
|
|
/* Sign-extend: */ |
1111 |
|
|
if (ic->arg[0] & 0x00400000) |
1112 |
|
|
ic->arg[0] |= 0xffffffffff800000ULL; |
1113 |
|
|
/* Branches are calculated as PC + 4 + offset. */ |
1114 |
|
|
ic->arg[0] = (size_t)(ic->arg[0] + 4); |
1115 |
|
|
/* Special case: branch within the same page: */ |
1116 |
|
|
{ |
1117 |
|
|
uint64_t mask_within_page = |
1118 |
|
|
((ALPHA_IC_ENTRIES_PER_PAGE-1) << 2) | 3; |
1119 |
|
|
uint64_t old_pc = addr; |
1120 |
|
|
uint64_t new_pc = old_pc + (int32_t)ic->arg[0]; |
1121 |
|
|
if ((old_pc & ~mask_within_page) == |
1122 |
|
|
(new_pc & ~mask_within_page)) { |
1123 |
|
|
ic->f = samepage_function; |
1124 |
|
|
ic->arg[0] = (size_t) ( |
1125 |
|
|
cpu->cd.alpha.cur_ic_page + |
1126 |
|
|
((new_pc & mask_within_page) >> 2)); |
1127 |
|
|
} |
1128 |
|
|
} |
1129 |
|
|
break; |
1130 |
|
|
default:fatal("[ UNIMPLEMENTED Alpha opcode 0x%x ]\n", opcode); |
1131 |
|
|
goto bad; |
1132 |
|
|
} |
1133 |
|
|
|
1134 |
|
|
|
1135 |
|
|
#define DYNTRANS_TO_BE_TRANSLATED_TAIL |
1136 |
|
|
#include "cpu_dyntrans.c" |
1137 |
|
|
#undef DYNTRANS_TO_BE_TRANSLATED_TAIL |
1138 |
|
|
} |
1139 |
|
|
|