Move SIMD constants to jit_State to keep them in the low 4GB.

src/lj_ir.c

@@ -235,6 +235,7 @@ TRef lj_ir_knum_addr(jit_State *J, cTValue *tv)
       goto found;
   ref = ir_nextk(J);
   ir = IR(ref);
+  lua_assert(checkptr32(tv));
   setmref(ir->ptr, tv);
   ir->t.irt = IRT_NUM;
   ir->o = IR_KNUM;
@@ -250,12 +251,6 @@ TRef lj_ir_knum_nn(jit_State *J, uint64_t nn)
   return lj_ir_knum_addr(J, ir_knum_find(J, nn));
 }
 
-/* Special 16 byte aligned SIMD constants. */
-LJ_DATADEF LJ_ALIGN(16) cTValue lj_ir_knum_tv[4] = {
-  { U64x(7fffffff,ffffffff) }, { U64x(7fffffff,ffffffff) },
-  { U64x(80000000,00000000) }, { U64x(80000000,00000000) }
-};
-
 /* Check whether a number is int and return it. -0 is NOT considered an int. */
 static int numistrueint(lua_Number n, int32_t *kp)
 {

src/lj_iropt.h

@@ -64,10 +64,9 @@ static LJ_AINLINE TRef lj_ir_knum(jit_State *J, lua_Number n)
 #define lj_ir_knum_one(J)	lj_ir_knum_nn(J, U64x(3ff00000,00000000))
 #define lj_ir_knum_tobit(J)	lj_ir_knum_nn(J, U64x(43380000,00000000))
 
-/* Special 16 byte aligned SIMD constants. */
+/* Special 128 bit SIMD constants. */
-LJ_DATA LJ_ALIGN(16) cTValue lj_ir_knum_tv[4];
+#define lj_ir_knum_abs(J)	lj_ir_knum_addr(J, LJ_KSIMD(J, LJ_KSIMD_ABS))
-#define lj_ir_knum_abs(J)	lj_ir_knum_addr(J, &lj_ir_knum_tv[0])
+#define lj_ir_knum_neg(J)	lj_ir_knum_addr(J, LJ_KSIMD(J, LJ_KSIMD_NEG))
-#define lj_ir_knum_neg(J)	lj_ir_knum_addr(J, &lj_ir_knum_tv[2])
 
 /* Access to constants. */
 LJ_FUNC void lj_ir_kvalue(lua_State *L, TValue *tv, const IRIns *ir);

src/lj_jit.h

@@ -201,6 +201,17 @@ typedef struct BPropEntry {
 /* Number of slots for the backpropagation cache. Must be a power of 2. */
 #define BPROP_SLOTS	16
 
+/* 128 bit SIMD constants. */
+enum {
+  LJ_KSIMD_ABS,
+  LJ_KSIMD_NEG,
+  LJ_KSIMD__MAX
+};
+
+/* Get 16 byte aligned pointer to SIMD constant. */
+#define LJ_KSIMD(J, n) \
+  ((TValue *)(((intptr_t)&J->ksimd[2*(n)] + 15) & ~(intptr_t)15))
+
 /* Fold state is used to fold instructions on-the-fly. */
 typedef struct FoldState {
   IRIns ins;		/* Currently emitted instruction. */
@@ -214,21 +225,21 @@ typedef struct jit_State {
 
   lua_State *L;		/* Current Lua state. */
   const BCIns *pc;	/* Current PC. */
-  BCReg maxslot;	/* Relative to baseslot. */
-
-  uint32_t flags;	/* JIT engine flags. */
-  TRef *base;		/* Current frame base, points into J->slots. */
-  BCReg baseslot;	/* Current frame base, offset into J->slots. */
   GCfunc *fn;		/* Current function. */
   GCproto *pt;		/* Current prototype. */
+  TRef *base;		/* Current frame base, points into J->slots. */
 
-  FoldState fold;	/* Fold state. */
+  uint32_t flags;	/* JIT engine flags. */
+  BCReg maxslot;	/* Relative to baseslot. */
+  BCReg baseslot;	/* Current frame base, offset into J->slots. */
 
   uint8_t mergesnap;	/* Allowed to merge with next snapshot. */
   uint8_t needsnap;	/* Need snapshot before recording next bytecode. */
   IRType1 guardemit;	/* Accumulated IRT_GUARD for emitted instructions. */
   uint8_t unused1;
 
+  FoldState fold;	/* Fold state. */
+
   const BCIns *bc_min;	/* Start of allowed bytecode range for root trace. */
   MSize bc_extent;	/* Extent of the range. */
 
@@ -241,19 +252,20 @@ typedef struct jit_State {
   int32_t retdepth;	/* Return frame depth (count of RETF). */
 
   MRef knum;		/* Pointer to chained array of KNUM constants. */
+  TValue ksimd[LJ_KSIMD__MAX*2+1];  /* 16 byte aligned SIMD constants. */
 
   IRIns *irbuf;		/* Temp. IR instruction buffer. Biased with REF_BIAS. */
   IRRef irtoplim;	/* Upper limit of instuction buffer (biased). */
   IRRef irbotlim;	/* Lower limit of instuction buffer (biased). */
   IRRef loopref;	/* Last loop reference or ref of final LOOP (or 0). */
 
+  MSize sizesnap;	/* Size of temp. snapshot buffer. */
   SnapShot *snapbuf;	/* Temp. snapshot buffer. */
   SnapEntry *snapmapbuf;  /* Temp. snapshot map buffer. */
-  MSize sizesnap;	/* Size of temp. snapshot buffer. */
   MSize sizesnapmap;	/* Size of temp. snapshot map buffer. */
 
-  Trace **trace;	/* Array of traces. */
   TraceNo curtrace;	/* Current trace number (if not 0). Kept in J->cur. */
+  Trace **trace;	/* Array of traces. */
   TraceNo freetrace;	/* Start of scan for next free trace. */
   MSize sizetrace;	/* Size of trace array. */
 

src/lj_state.c

@@ -134,6 +134,7 @@ static TValue *cpluaopen(lua_State *L, lua_CFunction dummy, void *ud)
   lj_lex_init(L);
   fixstring(lj_err_str(L, LJ_ERR_ERRMEM));  /* Preallocate memory error msg. */
   g->gc.threshold = 4*g->gc.total;
+  lj_trace_initstate(g);
   return NULL;
 }
 

src/lj_trace.c

@@ -275,6 +275,20 @@ int lj_trace_flushall(lua_State *L)
   return 0;
 }
 
+/* Initialize JIT compiler state. */
+void lj_trace_initstate(global_State *g)
+{
+  jit_State *J = G2J(g);
+  TValue *tv;
+  /* Initialize SIMD constants. */
+  tv = LJ_KSIMD(J, LJ_KSIMD_ABS);
+  tv[0].u64 = U64x(7fffffff,ffffffff);
+  tv[1].u64 = U64x(7fffffff,ffffffff);
+  tv = LJ_KSIMD(J, LJ_KSIMD_NEG);
+  tv[0].u64 = U64x(80000000,00000000);
+  tv[1].u64 = U64x(80000000,00000000);
+}
+
 /* Free everything associated with the JIT compiler state. */
 void lj_trace_freestate(global_State *g)
 {

src/lj_trace.h

@@ -28,6 +28,7 @@ LJ_FUNC void lj_trace_reenableproto(GCproto *pt);
 LJ_FUNC void lj_trace_flushproto(global_State *g, GCproto *pt);
 LJ_FUNC int lj_trace_flush(jit_State *J, TraceNo traceno);
 LJ_FUNC int lj_trace_flushall(lua_State *L);
+LJ_FUNC void lj_trace_initstate(global_State *g);
 LJ_FUNC void lj_trace_freestate(global_State *g);
 
 /* Event handling. */
@@ -42,6 +43,7 @@ LJ_FUNCA int LJ_FASTCALL lj_trace_exit(jit_State *J, void *exptr);
 #else
 
 #define lj_trace_flushall(L)	(UNUSED(L), 0)
+#define lj_trace_initstate(g)	UNUSED(g)
 #define lj_trace_freestate(g)	UNUSED(g)
 #define lj_trace_freeproto(g, pt)  (UNUSED(g), UNUSED(pt), (void)0)
 #define lj_trace_abort(g)	UNUSED(g)