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[LA64_DYNAREC] Added olds tracking #4697

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Merged
ptitSeb merged 1 commit into from
Nov 12, 2026
Merged

[LA64_DYNAREC] Added olds tracking #4697

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6 changes: 6 additions & 0 deletions src/dynarec/la64/dynarec_la64_functions.c
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,7 @@ static void fpu_reset_reg_lsxcache(lsxcache_t* lsx)
void fpu_reset_reg(dynarec_la64_t* dyn)
{
fpu_reset_reg_lsxcache(&dyn->lsx);
for (int i = 0; i < 24; ++i) dyn->lsx.olds[i].v = 0;
}


Expand Down Expand Up @@ -435,6 +436,10 @@ void lsxcacheUnwind(lsxcache_t* cache)
cache->lsxcache[i].v = 0;
cache->news = 0;
}
// restore the entries this opcode changed or removed
for (int i = 0; i < 24; ++i)
if (cache->olds[i].v)
cache->lsxcache[i] = cache->olds[i];
if (cache->stack_push) {
// unpush
for (int j = 0; j < 24; ++j) {
Expand Down Expand Up @@ -1135,6 +1140,7 @@ static int tryApplyPreloadCache(dynarec_la64_t* dyn, int first, int last, int re
cache->lsxcache[reg].n = reg;
cache->fpuused[reg] = 1;
cache->news &= ~(1u << reg);
cache->olds[reg].v = 0;
if (ymm) {
cache->ssecache[reg].v = -1;
cache->avxcache[reg].reg = reg;
Expand Down
21 changes: 21 additions & 0 deletions src/dynarec/la64/dynarec_la64_helper.c
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Expand Up @@ -1459,6 +1459,17 @@ static void mmx_reflectcache(dynarec_la64_t* dyn, int ninst, int s1)
}

// SSE / SSE2 helpers

static void sse_save_entry_cache(dynarec_la64_t* dyn, int a)
{
if (a < 0 || a >= 16) return;
int slot = dyn->lsx.avxcache[a].v != -1 ? dyn->lsx.avxcache[a].reg : (dyn->lsx.ssecache[a].v != -1 ? dyn->lsx.ssecache[a].reg : -1);
if (slot < 0 || slot >= 24) return;
if (dyn->lsx.olds[slot].v) return;
if (dyn->lsx.news & (1u << slot)) return;
dyn->lsx.olds[slot] = dyn->lsx.lsxcache[slot];
}

void sse_merge_all(dynarec_la64_t* dyn, int ninst)
{
for (int i = 0; i < 16; ++i)
Expand All @@ -1469,6 +1480,7 @@ void sse_merge_all(dynarec_la64_t* dyn, int ninst)
int sse_get_reg(dynarec_la64_t* dyn, int ninst, int s1, int a, int forwrite)
{
dyn->lsx.xmm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.ssecache[a].v != -1) {
xmm_scalar_merge(dyn, ninst, a);
if (forwrite) {
Expand All @@ -1490,6 +1502,7 @@ int sse_get_reg_scalar(dynarec_la64_t* dyn, int ninst, int s1, int a, int forwri
{
MAYUSE(forwrite);
dyn->lsx.xmm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.scalarcache[a] != -1) {
int reg = dyn->lsx.scalarcache[a];
if (dyn->lsx.lsxcache[reg].t == (kind == XMM_SCALAR_SS ? LSX_CACHE_XMM_S : LSX_CACHE_XMM_D)) return reg;
Expand All @@ -1515,6 +1528,7 @@ int sse_get_reg_scalar(dynarec_la64_t* dyn, int ninst, int s1, int a, int forwri
int sse_get_reg_empty(dynarec_la64_t* dyn, int ninst, int s1, int a)
{
dyn->lsx.xmm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.ssecache[a].v != -1) {
xmm_scalar_discard(dyn, a);
dyn->lsx.ssecache[a].write = 1;
Expand All @@ -1534,6 +1548,7 @@ int sse_get_reg_empty(dynarec_la64_t* dyn, int ninst, int s1, int a)
void sse_forget_reg(dynarec_la64_t* dyn, int ninst, int a)
{
dyn->lsx.xmm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.ssecache[a].v == -1)
return;
xmm_scalar_merge(dyn, ninst, a);
Expand Down Expand Up @@ -1631,6 +1646,7 @@ static void sse_reflectcache(dynarec_la64_t* dyn, int ninst, int s1)
int avx_get_reg(dynarec_la64_t* dyn, int ninst, int s1, int a, int forwrite, int width)
{
dyn->lsx.ymm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (width == LSX_AVX_WIDTH_256) {
ymm_live_read(dyn, ninst, a);
if (forwrite) ymm_live_write(dyn, ninst, a);
Expand Down Expand Up @@ -1671,6 +1687,7 @@ int avx_get_reg(dynarec_la64_t* dyn, int ninst, int s1, int a, int forwrite, int
int avx_get_reg_empty(dynarec_la64_t* dyn, int ninst, int s1, int a, int width)
{
dyn->lsx.ymm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (width == LSX_AVX_WIDTH_128)
ymm_live_zero(dyn, ninst, a);
else
Expand All @@ -1696,6 +1713,7 @@ int avx_get_reg_empty(dynarec_la64_t* dyn, int ninst, int s1, int a, int width)
void avx_reflect_reg_upper128(dynarec_la64_t* dyn, int ninst, int a, int forwrite)
{
dyn->lsx.ymm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.avxcache[a].v == -1 || forwrite == 0)
return;
if (dyn->lsx.lsxcache[dyn->lsx.avxcache[a].reg].t == LSX_CACHE_YMMW) {
Expand All @@ -1713,6 +1731,7 @@ void avx_reflect_reg_upper128(dynarec_la64_t* dyn, int ninst, int a, int forwrit
void avx_forget_reg(dynarec_la64_t* dyn, int ninst, int a)
{
dyn->lsx.ymm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.avxcache[a].v == -1)
return;
if (dyn->lsx.lsxcache[dyn->lsx.avxcache[a].reg].t == LSX_CACHE_YMMW) {
Expand All @@ -1732,6 +1751,7 @@ void avx_forget_reg(dynarec_la64_t* dyn, int ninst, int a)
void avx_reflect_reg(dynarec_la64_t* dyn, int ninst, int a)
{
dyn->lsx.ymm_used |= 1 << a;
sse_save_entry_cache(dyn, a);
if (dyn->lsx.avxcache[a].v == -1)
return;
if (dyn->lsx.lsxcache[dyn->lsx.avxcache[a].reg].t == LSX_CACHE_YMMW) {
Expand Down Expand Up @@ -1988,6 +2008,7 @@ void fpu_propagate_stack(dynarec_la64_t* dyn, int ninst)
}
dyn->lsx.stack = dyn->lsx.stack_next;
dyn->lsx.news = 0;
for (int i = 0; i < 24; ++i) dyn->lsx.olds[i].v = 0;
dyn->lsx.stack_push = 0;
dyn->lsx.swapped = 0;
}
Expand Down
1 change: 1 addition & 0 deletions src/dynarec/la64/dynarec_la64_private.h
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Expand Up @@ -66,6 +66,7 @@ typedef struct lsxcache_s {
uint8_t pushed; // positive pushed value (to check for overflow)
uint8_t poped; // positive poped value (to check for underflow)
uint32_t news; // bitmask, wich neoncache are new for this opcode
lsx_cache_t olds[24]; // entry descriptor of slots changed or removed by this opcode
// fpu cache
int8_t x87cache[8]; // cache status for the 8 x87 register behind the fpu stack
int8_t x87reg[8]; // reg used for x87cache entry
Expand Down
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