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FFI: Fix C calls with complex values on x64.

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This commit is contained in:
Mike Pall 2011-01-11 03:36:49 +01:00
parent a54843bb51
commit 8d858bfefa
1 changed files with 20 additions and 13 deletions
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33
src/lj_ccall.c
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@ -44,9 +44,9 @@
#define CCALL_HANDLE_REGARG \
if (isfp) { /* Try to pass argument in FPRs. */ \
if (nfpr + isfp <= CCALL_NARG_FPR) { \
if (nfpr + n <= CCALL_NARG_FPR) { \
dp = &cc->fpr[nfpr]; \
nfpr += isfp; \
nfpr += n; \
goto done; \
} \
} else { /* Try to pass argument in GPRs. */ \
@ -272,6 +272,13 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
else
cc->fpr[ngpr-1].l[0] = cc->gpr[ngpr-1];
}
#endif
#if LJ_TARGET_X64 && !LJ_ABI_WIN
if (isfp == 2 && n == 2 &&
(uint8_t *)dp == (uint8_t *)&cc->fpr[nfpr-2]) {
cc->fpr[nfpr-1].d[0] = cc->fpr[nfpr-2].d[1];
cc->fpr[nfpr-2].d[1] = 0;
}
#endif
}
if (fid) lj_err_caller(L, LJ_ERR_FFI_NUMARG); /* Too few arguments. */
@ -309,20 +316,20 @@ static int ccall_get_results(lua_State *L, CTState *cts, CType *ct,
/* Return cdata object which is already on top of stack. */
#if !CCALL_COMPLEX_RETREF || !CCALL_COMPLEXF_RETREF
void *dp = cdataptr(cdataV(L->top-1)); /* Use preallocated object. */
#if CCALL_COMPLEX_RETREF && !CCALL_COMPLEXF_RETREF
#if !CCALL_NUM_FPR
memcpy(dp, sp, ctr->size); /* Copy complex from GPRs. */
#elif CCALL_COMPLEX_RETREF && !CCALL_COMPLEXF_RETREF
if (ctr->size == 2*sizeof(float))
memcpy(dp, sp, ctr->size); /* Copy complex float from GPRs. */
#elif CCALL_NUM_FPR
/* Copy non-contiguous re/im part from FPRs to cdata object. */
if (ctr->size == 2*sizeof(float)) {
((float *)dp)[0] = cc->fpr[0].f[0];
((float *)dp)[1] = cc->fpr[1].f[0];
} else {
((double *)dp)[0] = cc->fpr[0].d[0];
((double *)dp)[1] = cc->fpr[1].d[0];
*(int64_t *)dp = *(int64_t *)sp; /* Copy complex float from GPRs. */
#elif LJ_TARGET_X64
if (ctr->size == 2*sizeof(float)) { /* Copy complex float from FPR. */
*(int64_t *)dp = cc->fpr[0].l[0];
} else { /* Copy non-contiguous complex double from FPRs. */
((int64_t *)dp)[0] = cc->fpr[0].l[0];
((int64_t *)dp)[1] = cc->fpr[1].l[0];
}
#else
memcpy(dp, sp, ctr->size); /* Copy complex from GPRs. */
#error "missing definition for handling of complex return values"
#endif
#endif
return 1; /* One GC step. */