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sim: example-synacor: invert sim_cpu storage

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This commit is contained in:
Mike Frysinger 2022-11-01 11:42:11 +05:45
parent 3fbdc6f908
commit 86ecb89bb7
3 changed files with 47 additions and 37 deletions
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3
sim/example-synacor/interp.c
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@ -88,7 +88,8 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback,
current_target_byte_order = BFD_ENDIAN_LITTLE; current_target_byte_order = BFD_ENDIAN_LITTLE;
/* The cpu data is kept in a separately allocated chunk of memory. */ /* The cpu data is kept in a separately allocated chunk of memory. */
if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK) if (sim_cpu_alloc_all_extra (sd, 1, sizeof (struct example_sim_cpu))
!= SIM_RC_OK)
{ {
free_state (sd); free_state (sd);
return 0; return 0;

72
sim/example-synacor/sim-main.c
View File

@ -34,7 +34,7 @@ register_num (SIM_CPU *cpu, uint16_t num)
SIM_DESC sd = CPU_STATE (cpu); SIM_DESC sd = CPU_STATE (cpu);
if (num < 0x8000 || num >= 0x8008) if (num < 0x8000 || num >= 0x8008)
sim_engine_halt (sd, cpu, NULL, cpu->pc, sim_signalled, SIM_SIGILL); sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_signalled, SIM_SIGILL);
return num & 0xf; return num & 0xf;
} }
@ -44,6 +44,7 @@ static uint16_t
interp_num (SIM_CPU *cpu, uint16_t num) interp_num (SIM_CPU *cpu, uint16_t num)
{ {
SIM_DESC sd = CPU_STATE (cpu); SIM_DESC sd = CPU_STATE (cpu);
struct example_sim_cpu *example_cpu = EXAMPLE_SIM_CPU (cpu);
if (num < 0x8000) if (num < 0x8000)
{ {
@ -55,13 +56,13 @@ interp_num (SIM_CPU *cpu, uint16_t num)
{ {
/* Numbers 32768..32775 instead mean registers 0..7. */ /* Numbers 32768..32775 instead mean registers 0..7. */
TRACE_DECODE (cpu, "%#x is register R%i", num, num & 0xf); TRACE_DECODE (cpu, "%#x is register R%i", num, num & 0xf);
return cpu->regs[num & 0xf]; return example_cpu->regs[num & 0xf];
} }
else else
{ {
/* Numbers 32776..65535 are invalid. */ /* Numbers 32776..65535 are invalid. */
TRACE_DECODE (cpu, "%#x is an invalid number", num); TRACE_DECODE (cpu, "%#x is an invalid number", num);
sim_engine_halt (sd, cpu, NULL, cpu->pc, sim_signalled, SIM_SIGILL); sim_engine_halt (sd, cpu, NULL, example_cpu->pc, sim_signalled, SIM_SIGILL);
} }
} }
@ -69,6 +70,7 @@ interp_num (SIM_CPU *cpu, uint16_t num)
void step_once (SIM_CPU *cpu) void step_once (SIM_CPU *cpu)
{ {
SIM_DESC sd = CPU_STATE (cpu); SIM_DESC sd = CPU_STATE (cpu);
struct example_sim_cpu *example_cpu = EXAMPLE_SIM_CPU (cpu);
uint16_t iw1, num1; uint16_t iw1, num1;
sim_cia pc = sim_pc_get (cpu); sim_cia pc = sim_pc_get (cpu);
@ -96,7 +98,7 @@ void step_once (SIM_CPU *cpu)
TRACE_INSN (cpu, "SET R%i %#x", num2, num3); TRACE_INSN (cpu, "SET R%i %#x", num2, num3);
TRACE_REGISTER (cpu, "R%i = %#x", num2, num3); TRACE_REGISTER (cpu, "R%i = %#x", num2, num3);
cpu->regs[num2] = num3; example_cpu->regs[num2] = num3;
pc += 6; pc += 6;
} }
@ -110,9 +112,9 @@ void step_once (SIM_CPU *cpu)
TRACE_EXTRACT (cpu, "PUSH %#x", iw2); TRACE_EXTRACT (cpu, "PUSH %#x", iw2);
TRACE_INSN (cpu, "PUSH %#x", num2); TRACE_INSN (cpu, "PUSH %#x", num2);
sim_core_write_aligned_2 (cpu, pc, write_map, cpu->sp, num2); sim_core_write_aligned_2 (cpu, pc, write_map, example_cpu->sp, num2);
cpu->sp -= 2; example_cpu->sp -= 2;
TRACE_REGISTER (cpu, "SP = %#x", cpu->sp); TRACE_REGISTER (cpu, "SP = %#x", example_cpu->sp);
pc += 4; pc += 4;
} }
@ -126,12 +128,12 @@ void step_once (SIM_CPU *cpu)
num2 = register_num (cpu, iw2); num2 = register_num (cpu, iw2);
TRACE_EXTRACT (cpu, "POP %#x", iw2); TRACE_EXTRACT (cpu, "POP %#x", iw2);
TRACE_INSN (cpu, "POP R%i", num2); TRACE_INSN (cpu, "POP R%i", num2);
cpu->sp += 2; example_cpu->sp += 2;
TRACE_REGISTER (cpu, "SP = %#x", cpu->sp); TRACE_REGISTER (cpu, "SP = %#x", example_cpu->sp);
result = sim_core_read_aligned_2 (cpu, pc, read_map, cpu->sp); result = sim_core_read_aligned_2 (cpu, pc, read_map, example_cpu->sp);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 4; pc += 4;
} }
@ -153,7 +155,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = (%#x == %#x) = %i", num2, num3, num4, result); TRACE_DECODE (cpu, "R%i = (%#x == %#x) = %i", num2, num3, num4, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -175,7 +177,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = (%#x > %#x) = %i", num2, num3, num4, result); TRACE_DECODE (cpu, "R%i = (%#x > %#x) = %i", num2, num3, num4, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -258,7 +260,7 @@ void step_once (SIM_CPU *cpu)
32768, result); 32768, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -281,7 +283,7 @@ void step_once (SIM_CPU *cpu)
32768, result); 32768, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -302,7 +304,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = %#x %% %#x = %#x", num2, num3, num4, result); TRACE_DECODE (cpu, "R%i = %#x %% %#x = %#x", num2, num3, num4, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -323,7 +325,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = %#x & %#x = %#x", num2, num3, num4, result); TRACE_DECODE (cpu, "R%i = %#x & %#x = %#x", num2, num3, num4, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -344,7 +346,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = %#x | %#x = %#x", num2, num3, num4, result); TRACE_DECODE (cpu, "R%i = %#x | %#x = %#x", num2, num3, num4, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 8; pc += 8;
} }
@ -363,7 +365,7 @@ void step_once (SIM_CPU *cpu)
TRACE_DECODE (cpu, "R%i = (~%#x) & 0x7fff = %#x", num2, num3, result); TRACE_DECODE (cpu, "R%i = (~%#x) & 0x7fff = %#x", num2, num3, result);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 6; pc += 6;
} }
@ -385,7 +387,7 @@ void step_once (SIM_CPU *cpu)
result = sim_core_read_aligned_2 (cpu, pc, read_map, num3); result = sim_core_read_aligned_2 (cpu, pc, read_map, num3);
TRACE_REGISTER (cpu, "R%i = %#x", num2, result); TRACE_REGISTER (cpu, "R%i = %#x", num2, result);
cpu->regs[num2] = result; example_cpu->regs[num2] = result;
pc += 6; pc += 6;
} }
@ -422,9 +424,9 @@ void step_once (SIM_CPU *cpu)
TRACE_INSN (cpu, "CALL %#x", num2); TRACE_INSN (cpu, "CALL %#x", num2);
TRACE_MEMORY (cpu, "pushing %#x onto stack", (pc + 4) >> 1); TRACE_MEMORY (cpu, "pushing %#x onto stack", (pc + 4) >> 1);
sim_core_write_aligned_2 (cpu, pc, write_map, cpu->sp, (pc + 4) >> 1); sim_core_write_aligned_2 (cpu, pc, write_map, example_cpu->sp, (pc + 4) >> 1);
cpu->sp -= 2; example_cpu->sp -= 2;
TRACE_REGISTER (cpu, "SP = %#x", cpu->sp); TRACE_REGISTER (cpu, "SP = %#x", example_cpu->sp);
pc = num2; pc = num2;
TRACE_BRANCH (cpu, "CALL %#x", pc); TRACE_BRANCH (cpu, "CALL %#x", pc);
@ -436,9 +438,9 @@ void step_once (SIM_CPU *cpu)
uint16_t result; uint16_t result;
TRACE_INSN (cpu, "RET"); TRACE_INSN (cpu, "RET");
cpu->sp += 2; example_cpu->sp += 2;
TRACE_REGISTER (cpu, "SP = %#x", cpu->sp); TRACE_REGISTER (cpu, "SP = %#x", example_cpu->sp);
result = sim_core_read_aligned_2 (cpu, pc, read_map, cpu->sp); result = sim_core_read_aligned_2 (cpu, pc, read_map, example_cpu->sp);
TRACE_MEMORY (cpu, "popping %#x off of stack", result << 1); TRACE_MEMORY (cpu, "popping %#x off of stack", result << 1);
pc = result << 1; pc = result << 1;
@ -485,7 +487,7 @@ void step_once (SIM_CPU *cpu)
} }
TRACE_REGISTER (cpu, "R%i = %#x", iw2 & 0xf, c); TRACE_REGISTER (cpu, "R%i = %#x", iw2 & 0xf, c);
cpu->regs[iw2 & 0xf] = c; example_cpu->regs[iw2 & 0xf] = c;
pc += 4; pc += 4;
} }
@ -507,14 +509,18 @@ void step_once (SIM_CPU *cpu)
static sim_cia static sim_cia
pc_get (sim_cpu *cpu) pc_get (sim_cpu *cpu)
{ {
return cpu->pc; struct example_sim_cpu *example_cpu = EXAMPLE_SIM_CPU (cpu);
return example_cpu->pc;
} }
/* Set the program counter for this cpu to the new pc value. */ /* Set the program counter for this cpu to the new pc value. */
static void static void
pc_set (sim_cpu *cpu, sim_cia pc) pc_set (sim_cpu *cpu, sim_cia pc)
{ {
cpu->pc = pc; struct example_sim_cpu *example_cpu = EXAMPLE_SIM_CPU (cpu);
example_cpu->pc = pc;
} }
/* Initialize the state for a single cpu. Usuaully this involves clearing all /* Initialize the state for a single cpu. Usuaully this involves clearing all
@ -522,10 +528,12 @@ pc_set (sim_cpu *cpu, sim_cia pc)
helper functions too. */ helper functions too. */
void initialize_cpu (SIM_DESC sd, SIM_CPU *cpu) void initialize_cpu (SIM_DESC sd, SIM_CPU *cpu)
{ {
memset (cpu->regs, 0, sizeof (cpu->regs)); struct example_sim_cpu *example_cpu = EXAMPLE_SIM_CPU (cpu);
cpu->pc = 0;
memset (example_cpu->regs, 0, sizeof (example_cpu->regs));
example_cpu->pc = 0;
/* Make sure it's initialized outside of the 16-bit address space. */ /* Make sure it's initialized outside of the 16-bit address space. */
cpu->sp = 0x80000; example_cpu->sp = 0x80000;
CPU_PC_FETCH (cpu) = pc_get; CPU_PC_FETCH (cpu) = pc_get;
CPU_PC_STORE (cpu) = pc_set; CPU_PC_STORE (cpu) = pc_set;

9
sim/example-synacor/sim-main.h
View File

@ -21,21 +21,22 @@
#ifndef SIM_MAIN_H #ifndef SIM_MAIN_H
#define SIM_MAIN_H #define SIM_MAIN_H
#define SIM_HAVE_COMMON_SIM_CPU
#include "sim-basics.h" #include "sim-basics.h"
#include "sim-base.h" #include "sim-base.h"
struct _sim_cpu { struct example_sim_cpu {
/* ... simulator specific members ... */
uint16_t regs[8]; uint16_t regs[8];
sim_cia pc; sim_cia pc;
/* This isn't a real register, and the stack is not directly addressable, /* This isn't a real register, and the stack is not directly addressable,
so use memory outside of the 16-bit address space. */ so use memory outside of the 16-bit address space. */
uint32_t sp; uint32_t sp;
sim_cpu_base base;
}; };
#define EXAMPLE_SIM_CPU(cpu) ((struct example_sim_cpu *) CPU_ARCH_DATA (cpu))
extern void step_once (SIM_CPU *); extern void step_once (SIM_CPU *);
extern void initialize_cpu (SIM_DESC, SIM_CPU *); extern void initialize_cpu (SIM_DESC, SIM_CPU *);