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Commit f639da0f authored by KOBAYASHI Shuji's avatar KOBAYASHI Shuji
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Fix broken NaN with `MRB_NAN_BOXING` 

Example:

  $ bin/mruby -e '(Float::INFINITY - Float::INFINITY).nan?'
  zsh: segmentation fault

Cause:

  `SET_FLOAT_VALUE` is not used. It is needed for normalizing NaN.

Treatment:

  In my environment, this issue could be reproduced only when
  `infinity - infinity`, however `SET_FLOAT_VALUE` should be used in all
  arithmetic operations (regardless of boxing setting), I think.

  So I fixed all similar codes by extracting to macro.
parent 79fd986b
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Showing with 16 additions and 80 deletions
src/vm.c
View file @ f639da0f
......@@ -2214,9 +2214,13 @@ RETRY_TRY_BLOCK:
}
#define TYPES2(a,b) ((((uint16_t)(a))<<8)|(((uint16_t)(b))&0xff))
#define OP_MATH_BODY(op,v1,v2) do {\
v1(regs[a]) = v1(regs[a]) op v2(regs[a+1]);\
} while(0)
#define OP_MATH_FLOAT_BODY(op,t1,t2) do { \
RETURN_TYPE_OF_##t1 x = t1(regs[a]); \
RETURN_TYPE_OF_##t2 y = t2(regs[a+1]); \
SET_FLOAT_VALUE(mrb, regs[a], x op y); \
} while (0)
#define RETURN_TYPE_OF_mrb_fixnum mrb_int
#define RETURN_TYPE_OF_mrb_float mrb_float
CASE(OP_ADD, B) {
/* need to check if op is overridden */
......@@ -2239,33 +2243,13 @@ RETRY_TRY_BLOCK:
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x + y);
}
OP_MATH_FLOAT_BODY(+,mrb_fixnum,mrb_float);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x + y);
}
#else
OP_MATH_BODY(+,mrb_float,mrb_fixnum);
#endif
OP_MATH_FLOAT_BODY(+,mrb_float,mrb_fixnum);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x + y);
}
#else
OP_MATH_BODY(+,mrb_float,mrb_float);
#endif
OP_MATH_FLOAT_BODY(+,mrb_float,mrb_float);
break;
#endif
case TYPES2(MRB_TT_STRING,MRB_TT_STRING):
......@@ -2300,33 +2284,13 @@ RETRY_TRY_BLOCK:
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x - y);
}
OP_MATH_FLOAT_BODY(-,mrb_fixnum,mrb_float);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x - y);
}
#else
OP_MATH_BODY(-,mrb_float,mrb_fixnum);
#endif
OP_MATH_FLOAT_BODY(-,mrb_float,mrb_fixnum);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x - y);
}
#else
OP_MATH_BODY(-,mrb_float,mrb_float);
#endif
OP_MATH_FLOAT_BODY(-,mrb_float,mrb_float);
break;
#endif
default:
......@@ -2357,33 +2321,13 @@ RETRY_TRY_BLOCK:
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x * y);
}
OP_MATH_FLOAT_BODY(*,mrb_fixnum,mrb_float);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x * y);
}
#else
OP_MATH_BODY(*,mrb_float,mrb_fixnum);
#endif
OP_MATH_FLOAT_BODY(*,mrb_float,mrb_fixnum);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x * y);
}
#else
OP_MATH_BODY(*,mrb_float,mrb_float);
#endif
OP_MATH_FLOAT_BODY(*,mrb_float,mrb_float);
break;
#endif
default:
......@@ -2466,14 +2410,10 @@ RETRY_TRY_BLOCK:
break;
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
SET_FLOAT_VALUE(mrb, regs[a], x + b);
}
#else
mrb_float(regs[a]) += b;
#endif
break;
#endif
default:
......@@ -2507,14 +2447,10 @@ RETRY_TRY_BLOCK:
break;
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x - (mrb_float)b);
}
#else
mrb_float(regs_a[0]) -= b;
#endif
break;
#endif
default:
......
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