1 files changed, 20 insertions, 8 deletions

diff --git a/src/lj_jit.h b/src/lj_jit.h
index 23adf30d..f0472282 100644
--- a/src/lj_jit.h
+++ b/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. */