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target/hexagon: Add next_PC, {s,g}reg writes

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Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>
This commit is contained in:
Brian Cain
2026-06-22 15:28:47 -07:00
committed by Brian Cain
parent 5312546b4f
commit 17bcfb42be
2 changed files with 74 additions and 5 deletions
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77
target/hexagon/translate.c
View File

@@ -545,6 +545,10 @@ static void gen_start_packet(DisasContext *ctx)
ctx->reg_log_idx = 0;
bitmap_zero(ctx->regs_written, TOTAL_PER_THREAD_REGS);
bitmap_zero(ctx->predicated_regs, TOTAL_PER_THREAD_REGS);
#ifndef CONFIG_USER_ONLY
ctx->greg_log_idx = 0;
ctx->sreg_log_idx = 0;
#endif
ctx->preg_log_idx = 0;
bitmap_zero(ctx->pregs_written, NUM_PREGS);
ctx->future_vregs_idx = 0;
@@ -577,6 +581,25 @@ static void gen_start_packet(DisasContext *ctx)
* gen phase, so clear it again.
*/
bitmap_zero(ctx->pregs_written, NUM_PREGS);
#ifndef CONFIG_USER_ONLY
for (i = 0; i < HEX_SREG_GLB_START; i++) {
ctx->t_sreg_new_value[i] = NULL;
}
for (i = 0; i < ctx->sreg_log_idx; i++) {
int reg_num = ctx->sreg_log[i];
if (reg_num < HEX_SREG_GLB_START &&
(ctx->need_commit || reg_num == HEX_SREG_SSR)) {
ctx->t_sreg_new_value[reg_num] = tcg_temp_new();
}
}
for (i = 0; i < NUM_GREGS; i++) {
ctx->greg_new_value[i] = NULL;
}
for (i = 0; i < ctx->greg_log_idx; i++) {
int reg_num = ctx->greg_log[i];
ctx->greg_new_value[reg_num] = tcg_temp_new();
}
#endif
/* Initialize the runtime state for packet semantics */
if (need_slot_cancelled(&ctx->pkt)) {
@@ -734,6 +757,50 @@ static void gen_reg_writes(DisasContext *ctx)
}
}
#ifndef CONFIG_USER_ONLY
static void gen_greg_writes(DisasContext *ctx)
{
int i;
for (i = 0; i < ctx->greg_log_idx; i++) {
int reg_num = ctx->greg_log[i];
tcg_gen_mov_tl(hex_greg[reg_num], ctx->greg_new_value[reg_num]);
}
}
static void gen_sreg_writes(DisasContext *ctx)
{
int i;
TCGv_i32 old_reg = tcg_temp_new_i32();
for (i = 0; i < ctx->sreg_log_idx; i++) {
int reg_num = ctx->sreg_log[i];
if (reg_num == HEX_SREG_SSR) {
tcg_gen_mov_tl(old_reg, hex_t_sreg[reg_num]);
tcg_gen_mov_tl(hex_t_sreg[reg_num], ctx->t_sreg_new_value[reg_num]);
gen_helper_modify_ssr(tcg_env, ctx->t_sreg_new_value[reg_num],
old_reg);
} else if ((reg_num == HEX_SREG_STID) ||
(reg_num == HEX_SREG_IMASK) ||
(reg_num == HEX_SREG_IPENDAD)) {
if (ctx->need_commit && reg_num < HEX_SREG_GLB_START) {
tcg_gen_mov_tl(hex_t_sreg[reg_num],
ctx->t_sreg_new_value[reg_num]);
}
gen_helper_pending_interrupt(tcg_env);
} else if ((reg_num == HEX_SREG_BESTWAIT) ||
(reg_num == HEX_SREG_SCHEDCFG)) {
gen_helper_resched(tcg_env);
} else if (ctx->need_commit && reg_num < HEX_SREG_GLB_START) {
tcg_gen_mov_tl(hex_t_sreg[reg_num], ctx->t_sreg_new_value[reg_num]);
}
}
}
#endif
static void gen_pred_writes(DisasContext *ctx)
{
/* Early exit if not needed or the log is empty */
@@ -1030,6 +1097,10 @@ static void gen_commit_packet(DisasContext *ctx)
process_store_log(ctx);
gen_reg_writes(ctx);
#ifndef CONFIG_USER_ONLY
gen_greg_writes(ctx);
gen_sreg_writes(ctx);
#endif
gen_pred_writes(ctx);
if (ctx->pkt.pkt_has_hvx) {
gen_commit_hvx(ctx);
@@ -1242,6 +1313,8 @@ void hexagon_translate_init(void)
hex_llsc_val_i64 = tcg_global_mem_new_i64(tcg_env,
offsetof(CPUHexagonState, llsc_val_i64), "llsc_val_i64");
#ifndef CONFIG_USER_ONLY
hex_cause_code = tcg_global_mem_new_i32(tcg_env,
offsetof(CPUHexagonState, cause_code), "cause_code");
hex_cycle_count = tcg_global_mem_new_i64(tcg_env,
offsetof(CPUHexagonState, t_cycle_count), "t_cycle_count");
#endif
@@ -1282,8 +1355,4 @@ void hexagon_translate_init(void)
offsetof(CPUHexagonState, vstore_pending[i]),
vstore_pending_names[i]);
}
#ifndef CONFIG_USER_ONLY
hex_cause_code = tcg_global_mem_new(tcg_env,
offsetof(CPUHexagonState, cause_code), "cause_code");
#endif
}

2
target/hexagon/translate.h
View File

@@ -46,7 +46,7 @@ typedef struct DisasContext {
int greg_log_idx;
int sreg_log[SREG_WRITES_MAX];
int sreg_log_idx;
TCGv_i32 t_sreg_new_value[NUM_SREGS];
TCGv_i32 t_sreg_new_value[HEX_SREG_GLB_START];
TCGv_i32 greg_new_value[NUM_GREGS];
#endif
int preg_log[PRED_WRITES_MAX];