gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-08 07:34:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Use lj_vm_tobit() on targets without FPU.

Browse Source
This commit is contained in:
Mike Pall 2011-04-10 16:57:09 +02:00
parent f089f3954c
commit 89022b4c3e
3 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/lj_obj.h
View File

@ -786,11 +786,19 @@ static LJ_AINLINE void copyTV(lua_State *L, TValue *o1, const TValue *o2)
/* -- Number to integer conversion ---------------------------------------- */ /* -- Number to integer conversion ---------------------------------------- */
#if !LJ_ARCH_HASFPU
LJ_ASMF int32_t lj_vm_tobit(double x);
#endif
static LJ_AINLINE int32_t lj_num2bit(lua_Number n) static LJ_AINLINE int32_t lj_num2bit(lua_Number n)
{ {
#if LJ_ARCH_HASFPU
TValue o; TValue o;
o.n = n + 6755399441055744.0; /* 2^52 + 2^51 */ o.n = n + 6755399441055744.0; /* 2^52 + 2^51 */
return (int32_t)o.u32.lo; return (int32_t)o.u32.lo;
#else
return lj_vm_tobit(n);
#endif
} }
#if LJ_TARGET_X86 && !defined(__SSE2__) #if LJ_TARGET_X86 && !defined(__SSE2__)

4
src/lj_opt_fold.c
View File

@ -541,9 +541,7 @@ LJFOLDF(kfold_add_kptr)
LJFOLD(TOBIT KNUM KNUM) LJFOLD(TOBIT KNUM KNUM)
LJFOLDF(kfold_tobit) LJFOLDF(kfold_tobit)
{ {
TValue tv; return INTFOLD(lj_num2bit(knumleft));
tv.n = knumleft + knumright;
return INTFOLD((int32_t)tv.u32.lo);
} }
LJFOLD(CONV KINT IRCONV_NUM_INT) LJFOLD(CONV KINT IRCONV_NUM_INT)

3
src/lj_vm.h
View File

@ -31,6 +31,9 @@ LJ_ASMF double lj_vm_foldarith(double x, double y, int op);
#if LJ_HASJIT #if LJ_HASJIT
LJ_ASMF double lj_vm_foldfpm(double x, int op); LJ_ASMF double lj_vm_foldfpm(double x, int op);
#endif #endif
#if !LJ_ARCH_HASFPU
/* Declared in lj_obj.h: LJ_ASMF int32_t lj_vm_tobit(double x); */
#endif
/* Dispatch targets for recording and hooks. */ /* Dispatch targets for recording and hooks. */
LJ_ASMF void lj_vm_record(void); LJ_ASMF void lj_vm_record(void);