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FFI: Fix 64 bit to 32 bit truncations on x64.

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This commit is contained in:
Mike Pall 2011-02-20 00:18:46 +01:00
parent 32eaa48c79
commit cf88c43dd6
1 changed files with 2 additions and 8 deletions
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10
src/lj_crecord.c
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@ -179,18 +179,12 @@ static TRef crec_ct_ct(jit_State *J, CType *d, CType *s, TRef dp, TRef sp,
case CCX(I, I):
conv_I_I:
if (dt == IRT_CDATA || st == IRT_CDATA) goto err_nyi;
#if LJ_64
/* Sign-extend 32 to 64 bit integer. */
if (dsize == 8 && ssize < 8 && !(sinfo & CTF_UNSIGNED))
sp = emitconv(sp, dt, IRT_INT, IRCONV_SEXT);
/* All other conversions are no-ops on x64. */
#else
if (dsize == 8 && ssize < 8) /* Extend to 64 bit integer. */
/* Extend 32 to 64 bit integer. */
if (dsize == 8 && ssize < 8 && !(LJ_64 && (sinfo & CTF_UNSIGNED)))
sp = emitconv(sp, dt, ssize < 4 ? IRT_INT : st,
(sinfo & CTF_UNSIGNED) ? 0 : IRCONV_SEXT);
else if (dsize < 8 && ssize == 8) /* Truncate from 64 bit integer. */
sp = emitconv(sp, dsize < 4 ? IRT_INT : dt, st, 0);
#endif
xstore:
if (dt == IRT_I64 || dt == IRT_U64) lj_needsplit(J);
if (dp == 0) return sp;