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x64: Fix type check for numbers in compiled code.

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This commit is contained in:
Mike Pall 2010-10-11 18:03:25 +02:00
parent 5140b40b44
commit cc62edebfd
1 changed files with 21 additions and 5 deletions
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20
src/lj_asm.c
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@ -130,6 +130,7 @@ static LJ_NORET LJ_NOINLINE void asm_mclimit(ASMState *as)
#define emit_i8(as, i) (*--as->mcp = (MCode)(i))
#define emit_i32(as, i) (*(int32_t *)(as->mcp-4) = (i), as->mcp -= 4)
#define emit_u32(as, u) (*(uint32_t *)(as->mcp-4) = (u), as->mcp -= 4)
#define emit_x87op(as, xo) \
(*(uint16_t *)(as->mcp-2) = (uint16_t)(xo), as->mcp -= 2)
@ -1683,8 +1684,13 @@ static void asm_href(ASMState *as, IRIns *ir)
emit_rmro(as, XO_UCOMISD, key, dest, offsetof(Node, key.n));
emit_sjcc(as, CC_A, l_next);
/* The type check avoids NaN penalties and complaints from Valgrind. */
#if LJ_64
emit_u32(as, LJ_TISNUM);
emit_rmro(as, XO_ARITHi, XOg_CMP, dest, offsetof(Node, key.it));
#else
emit_i8(as, ~IRT_NUM);
emit_rmro(as, XO_ARITHi8, XOg_CMP, dest, offsetof(Node, key.it));
#endif
}
#if LJ_64
} else if (irt_islightud(kt)) {
@ -2004,11 +2010,16 @@ static void asm_ahuvload(ASMState *as, IRIns *ir)
asm_fuseahuref(as, ir->op1, RSET_GPR);
}
/* Always do the type check, even if the load result is unused. */
asm_guardcc(as, irt_isnum(ir->t) ? CC_A : CC_NE);
emit_i8(as, ~irt_type(ir->t));
as->mrm.ofs += 4;
asm_guardcc(as, irt_isnum(ir->t) ? CC_A : CC_NE);
if (LJ_64 && irt_isnum(ir->t)) {
emit_u32(as, LJ_TISNUM);
emit_mrm(as, XO_ARITHi, XOg_CMP, RID_MRM);
} else {
emit_i8(as, ~irt_type(ir->t));
emit_mrm(as, XO_ARITHi8, XOg_CMP, RID_MRM);
}
}
static void asm_ahustore(ASMState *as, IRIns *ir)
{
@ -2085,10 +2096,15 @@ static void asm_sload(ASMState *as, IRIns *ir)
if ((ir->op2 & IRSLOAD_TYPECHECK)) {
/* Need type check, even if the load result is unused. */
asm_guardcc(as, irt_isnum(t) ? CC_A : CC_NE);
if (LJ_64 && irt_isnum(t)) {
emit_u32(as, LJ_TISNUM);
emit_rmro(as, XO_ARITHi, XOg_CMP, base, ofs+4);
} else {
emit_i8(as, ~irt_type(t));
emit_rmro(as, XO_ARITHi8, XOg_CMP, base, ofs+4);
}
}
}
/* -- Allocations --------------------------------------------------------- */