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qemu-e2k
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target: e2k: Add cpu state is_jmp.

This commit is contained in:
Denis Drakhnia 2020-11-11 16:56:46 +02:00 committed by Denis Drakhnia
parent 3cc618ce20
commit baa5780663
2 changed files with 35 additions and 14 deletions
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1
target/e2k/cpu.h
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@ -34,6 +34,7 @@ typedef struct CPUArchState {
unsigned int rcur; // based regs current index (* 2)
unsigned int psz; // pred regs window size
unsigned int is_jmp;
/* control registers */
target_ulong ctprs[3]; // Control Transfer Preparation Register (CTPR)

48
target/e2k/translate.c
View File

@ -14,6 +14,7 @@ static TCGv_ptr cpu_win_ptr;
static TCGv_i64 cpu_wregs[WREGS_SIZE];
static TCGv_i64 cpu_gregs[32];
static TCGv cpu_pc;
static TCGv_i32 cpu_is_jmp;
static TCGv_i64 cpu_pregs;
static TCGv cpu_ctprs[3];
static TCGv_i32 cpu_wbs;
@ -390,6 +391,16 @@ static inline void gen_wrap_i32(TCGv_i32 ret, TCGv_i32 x, TCGv_i32 y)
tcg_temp_free_i32(t0);
}
static inline void reset_is_jmp()
{
tcg_gen_movi_i32(cpu_is_jmp, 0);
}
static inline void set_is_jmp()
{
tcg_gen_movi_i32(cpu_is_jmp, 1);
}
static inline void gen_rcur_move()
{
TCGv_i32 tmp = tcg_temp_new_i32();
@ -701,6 +712,8 @@ static void gen_cs0(DisasContext *dc, CPUE2KState *env)
int sdisp = ((int) (disp << 4)) >> 1;
target_ulong tgt = dc->pc + sdisp;
TCGv dest = tcg_const_i64(tgt);
// TODO: temporary, need to move in ctcond evaluate
set_is_jmp();
dc->jmp.dest = dest;
dc->jmp.cond = cond;
}
@ -1172,13 +1185,15 @@ static void gen_jmp(DisasContext *dc, target_ulong next_pc)
// TODO: temporary only preg cond
if (cond_type == 2) {
TCGv_i64 preg = get_preg(dc, psrc);
TCGv_i64 cond = tcg_const_i64(1);
TCGv next = tcg_const_tl(next_pc);
dc->base.is_jmp = DISAS_NORETURN;
tcg_gen_movcond_i64(TCG_COND_EQ, cpu_pc,
preg, tcg_const_i64(1),
preg, cond,
dc->jmp.dest, next
);
tcg_gen_exit_tb(NULL, 0);
tcg_temp_free(cond);
}
/* These types of conditions involve a (probably negated) predicate
@ -1274,6 +1289,8 @@ static target_ulong disas_e2k_insn(DisasContext *dc, CPUState *cs)
unsigned int i;
target_ulong pc_next = unpack_instr(env, dc, dc->pc, instr);
reset_is_jmp();
if (dc->instr.cs0_present) {
gen_cs0(dc, env);
}
@ -1324,17 +1341,19 @@ static target_ulong disas_e2k_insn(DisasContext *dc, CPUState *cs)
// FIXME: not working in cond branches
// Change windowing registers
if (dc->jmp.cond == COND_NEVER) {
// move based if not branch
if (abn >> 1 != 0) {
gen_rcur_move();
}
// TODO: handle any branch
} else if (dc->jmp.cond != COND_NEVER) {
// move based if branch
if (abn & 0x1 != 0) {
gen_rcur_move();
}
TCGv_i32 t0 = tcg_temp_new_i32();
TCGv_i32 t1 = tcg_temp_new_i32();
TCGv_i32 zero = tcg_const_i32(0);
tcg_gen_addi_i32(t0, cpu_rcur, 2);
gen_wrap_i32(t1, t0, cpu_rsz);
tcg_gen_movcond_i32(TCG_COND_EQ, cpu_rcur, cpu_is_jmp, zero, t1, cpu_rcur);
tcg_temp_free_i32(zero);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t0);
}
// TODO: move based if branch
// Control transfer
if (env->interrupt_index != 0) {
@ -1466,11 +1485,11 @@ void e2k_tcg_initialize(void) {
unsigned int i;
for (i = 0; i < ARRAY_SIZE(r32); i++) {
*r32[i].ptr = tcg_global_mem_new(cpu_env, r32[i].off, r32[i].name);
*r32[i].ptr = tcg_global_mem_new_i32(cpu_env, r32[i].off, r32[i].name);
}
for (i = 0; i < ARRAY_SIZE(r64); i++) {
*r64[i].ptr = tcg_global_mem_new(cpu_env, r64[i].off, r64[i].name);
*r64[i].ptr = tcg_global_mem_new_i64(cpu_env, r64[i].off, r64[i].name);
}
for (i = 0; i < ARRAY_SIZE(rtl); i++) {
@ -1478,11 +1497,12 @@ void e2k_tcg_initialize(void) {
}
cpu_win_ptr = tcg_global_mem_new_ptr(cpu_env, offsetof(CPUE2KState, win_ptr), "win_ptr");
cpu_is_jmp = tcg_global_mem_new_i32(cpu_env, offsetof(CPUE2KState, is_jmp), "is_jmp");
for (i = 0; i < WREGS_SIZE; i++) {
snprintf(buf, ARRAY_SIZE(buf), "%%r%d", i);
cpu_wregs[i] = tcg_global_mem_new(cpu_win_ptr,
i * sizeof(target_ulong),
i * REG_SIZE,
buf);
}