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Add support for uint64_t <-> FP conversions to x64 backend.

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This commit is contained in:
Mike Pall 2011-01-02 18:24:31 +01:00
parent ddfa7fc246
commit 0005b2c2b9
2 changed files with 35 additions and 17 deletions
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49
src/lj_asm.c
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@ -1641,8 +1641,19 @@ static void asm_conv(ASMState *as, IRIns *ir)
return;
#endif
} else { /* Integer to FP conversion. */
Reg left = (LJ_64 && st == IRT_U32) ? ra_alloc1(as, lref, RSET_GPR) :
asm_fuseload(as, lref, RSET_GPR);
Reg tmp = (LJ_64 && st == IRT_U64) ? ra_scratch(as, RSET_GPR) : RID_NONE;
Reg left = (LJ_64 && (st == IRT_U32 || st == IRT_U64)) ?
ra_alloc1(as, lref, RSET_GPR) :
asm_fuseload(as, lref, RSET_GPR);
if (LJ_64 && st == IRT_U64) {
Reg tmpn = ra_scratch(as, rset_exclude(RSET_FPR, dest));
MCLabel l_end = emit_label(as);
emit_rr(as, XO_ADDSD, dest, tmpn);
emit_rr(as, XO_MOVD, tmpn|REX_64, tmp);
emit_loadu64(as, tmp, U64x(43f00000,00000000));
emit_sjcc(as, CC_NS, l_end);
emit_rr(as, XO_TEST, left|REX_64, left);
}
emit_mrm(as, irt_isnum(ir->t) ? XO_CVTSI2SD : XO_CVTSI2SS,
dest|((LJ_64 && (st64 || st == IRT_U32)) ? REX_64 : 0), left);
}
@ -1657,24 +1668,32 @@ static void asm_conv(ASMState *as, IRIns *ir)
/* NYI: number to 64 bit integer or uint32_t conversion. */
setintV(&as->J->errinfo, ir->o);
lj_trace_err_info(as->J, LJ_TRERR_NYIIR);
#else
} else if (irt_isu64(ir->t)) {
/* NYI: number to uint64_t conversion. */
setintV(&as->J->errinfo, ir->o);
lj_trace_err_info(as->J, LJ_TRERR_NYIIR);
#endif
} else {
Reg dest = ra_dest(as, ir, RSET_GPR);
Reg left = asm_fuseload(as, ir->op1, RSET_FPR);
x86Op op = st == IRT_NUM ?
((ir->op2 & IRCONV_TRUNC) ? XO_CVTTSD2SI : XO_CVTSD2SI) :
((ir->op2 & IRCONV_TRUNC) ? XO_CVTTSS2SI : XO_CVTSS2SI);
if (LJ_64 && irt_isu32(ir->t))
emit_rr(as, XO_MOV, dest, dest); /* Zero upper 32 bits. */
emit_mrm(as, op,
dest|((LJ_64 &&
(irt_is64(ir->t) || irt_isu32(ir->t))) ? REX_64 : 0),
left);
if (LJ_64 && irt_isu64(ir->t)) {
Reg left = ra_alloc1(as, lref, RSET_FPR);
Reg tmpn = ra_scratch(as, rset_exclude(RSET_FPR, left));
MCLabel l_end = emit_label(as);
emit_rr(as, op, dest|REX_64, tmpn);
emit_rr(as, XO_ADDSD, tmpn, left);
emit_rr(as, XO_MOVD, tmpn|REX_64, dest);
emit_loadu64(as, dest, U64x(c3f00000,00000000));
emit_sjcc(as, CC_NS, l_end);
emit_rr(as, XO_TEST, dest|REX_64, dest);
emit_rr(as, op, dest|REX_64, left);
} else {
Reg left = asm_fuseload(as, lref, RSET_FPR);
if (LJ_64 && irt_isu32(ir->t))
emit_rr(as, XO_MOV, dest, dest); /* Zero upper 32 bits. */
emit_mrm(as, op,
dest|((LJ_64 &&
(irt_is64(ir->t) || irt_isu32(ir->t))) ? REX_64 : 0),
left);
}
}
} else if (st >= IRT_I8 && st <= IRT_U16) { /* Extend to 32 bit integer. */
Reg left, dest = ra_dest(as, ir, RSET_GPR);
@ -1690,7 +1709,7 @@ static void asm_conv(ASMState *as, IRIns *ir)
} else {
op = XO_MOVZXw;
}
left = asm_fuseload(as, ir->op1, allow);
left = asm_fuseload(as, lref, allow);
/* Add extra MOV if source is already in wrong register. */
if (!LJ_64 && left != RID_MRM && !rset_test(allow, left)) {
Reg tmp = ra_scratch(as, allow);

3
src/lj_obj.h
View File

@ -767,8 +767,7 @@ static LJ_AINLINE uint64_t lj_num2u64(lua_Number n)
{
#ifdef _MSC_VER
if (n >= 9223372036854775808.0) /* They think it's a feature. */
return (uint64_t)(int64_t)(n - 9223372036854775808.0) +
U64x(80000000,00000000);
return (uint64_t)(int64_t)(n - 18446744073709551616.0);
else
#endif
return (uint64_t)n;