117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
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// Instrumentation and debugging code
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// Used to count instruction and register usage
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// Also provides some tracing capabilities
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#ifdef REGISTER_USAGE_ANALYZE
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u64 instructions_total = 0;
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u64 arm_reg_freq[16];
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u64 arm_reg_access_total = 0;
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u64 arm_instructions_total = 0;
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u64 thumb_reg_freq[16];
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u64 thumb_reg_access_total = 0;
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u64 thumb_instructions_total = 0;
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// mla/long mla's addition operand are not counted yet.
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#define using_register(instruction_set, register, type) \
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instruction_set##_reg_freq[register]++; \
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instruction_set##_reg_access_total++ \
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#define using_register_list(instruction_set, rlist, count) \
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{ \
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u32 i; \
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for(i = 0; i < count; i++) \
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{ \
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if((reg_list >> i) & 0x01) \
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{ \
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using_register(instruction_set, i, memory_target); \
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} \
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} \
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} \
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#define using_instruction(instruction_set) \
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instruction_set##_instructions_total++; \
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instructions_total++ \
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int sort_tagged_element(const void *_a, const void *_b)
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{
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const u64 *a = _a;
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const u64 *b = _b;
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return (int)(b[1] - a[1]);
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}
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void print_register_usage(void)
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{
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u32 i;
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u64 arm_reg_freq_tagged[32];
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u64 thumb_reg_freq_tagged[32];
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double percent;
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double percent_total = 0.0;
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for(i = 0; i < 16; i++)
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{
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arm_reg_freq_tagged[i * 2] = i;
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arm_reg_freq_tagged[(i * 2) + 1] = arm_reg_freq[i];
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thumb_reg_freq_tagged[i * 2] = i;
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thumb_reg_freq_tagged[(i * 2) + 1] = thumb_reg_freq[i];
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}
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qsort(arm_reg_freq_tagged, 16, sizeof(u64) * 2, sort_tagged_element);
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qsort(thumb_reg_freq_tagged, 16, sizeof(u64) * 2, sort_tagged_element);
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printf("ARM register usage (%lf%% ARM instructions):\n",
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(arm_instructions_total * 100.0) / instructions_total);
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for(i = 0; i < 16; i++)
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{
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percent = (arm_reg_freq_tagged[(i * 2) + 1] * 100.0) /
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arm_reg_access_total;
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percent_total += percent;
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printf("r%02d: %lf%% (-- %lf%%)\n",
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(u32)arm_reg_freq_tagged[(i * 2)], percent, percent_total);
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}
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percent_total = 0.0;
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printf("\nThumb register usage (%lf%% Thumb instructions):\n",
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(thumb_instructions_total * 100.0) / instructions_total);
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for(i = 0; i < 16; i++)
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{
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percent = (thumb_reg_freq_tagged[(i * 2) + 1] * 100.0) /
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thumb_reg_access_total;
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percent_total += percent;
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printf("r%02d: %lf%% (-- %lf%%)\n",
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(u32)thumb_reg_freq_tagged[(i * 2)], percent, percent_total);
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}
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memset(arm_reg_freq, 0, sizeof(u64) * 16);
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memset(thumb_reg_freq, 0, sizeof(u64) * 16);
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arm_reg_access_total = 0;
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thumb_reg_access_total = 0;
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}
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#else /* REGISTER_USAGE_ANALYZE */
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#define using_register(instruction_set, register, type)
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#define using_register_list(instruction_set, rlist, count)
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#define using_instruction(instruction_set)
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#endif /* REGISTER_USAGE_ANALYZE */
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#ifdef TRACE_INSTRUCTIONS
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static void interp_trace_instruction(u32 pc, u32 mode)
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{
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if (mode)
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printf("Executed arm %x\n", pc);
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else
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printf("Executed thumb %x\n", pc);
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#ifdef TRACE_REGISTERS
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print_regs();
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#endif
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}
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#endif
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