return gen_rtx_PARALLEL (mode, gen_rtvec_v (k, rvec));
}
+/* We have an argument of MODE and TYPE that goes into FPRs or VRs,
+ but must also be copied into the parameter save area starting at
+ offset ALIGN_WORDS. Fill in RVEC with the elements corresponding
+ to the GPRs and/or memory. Return the number of elements used. */
+
+static int
+rs6000_psave_function_arg (enum machine_mode mode, const_tree type,
+ int align_words, rtx *rvec)
+{
+ int k = 0;
+
+ if (align_words < GP_ARG_NUM_REG)
+ {
+ int n_words = rs6000_arg_size (mode, type);
+
+ if (align_words + n_words > GP_ARG_NUM_REG
+ || (TARGET_32BIT && TARGET_POWERPC64))
+ {
+ /* If this is partially on the stack, then we only
+ include the portion actually in registers here. */
+ enum machine_mode rmode = TARGET_32BIT ? SImode : DImode;
+ int i = 0;
+
+ if (align_words + n_words > GP_ARG_NUM_REG)
+ {
+ /* Not all of the arg fits in gprs. Say that it goes in memory
+ too, using a magic NULL_RTX component. Also see comment in
+ rs6000_mixed_function_arg for why the normal
+ function_arg_partial_nregs scheme doesn't work in this case. */
+ rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX, const0_rtx);
+ }
+
+ do
+ {
+ rtx r = gen_rtx_REG (rmode, GP_ARG_MIN_REG + align_words);
+ rtx off = GEN_INT (i++ * GET_MODE_SIZE (rmode));
+ rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, off);
+ }
+ while (++align_words < GP_ARG_NUM_REG && --n_words != 0);
+ }
+ else
+ {
+ /* The whole arg fits in gprs. */
+ rtx r = gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words);
+ rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, const0_rtx);
+ }
+ }
+ else
+ {
+ /* It's entirely in memory. */
+ rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX, const0_rtx);
+ }
+
+ return k;
+}
+
+/* RVEC is a vector of K components of an argument of mode MODE.
+ Construct the final function_arg return value from it. */
+
+static rtx
+rs6000_finish_function_arg (enum machine_mode mode, rtx *rvec, int k)
+{
+ gcc_assert (k >= 1);
+
+ /* Avoid returning a PARALLEL in the trivial cases. */
+ if (k == 1)
+ {
+ if (XEXP (rvec[0], 0) == NULL_RTX)
+ return NULL_RTX;
+
+ if (GET_MODE (XEXP (rvec[0], 0)) == mode)
+ return XEXP (rvec[0], 0);
+ }
+
+ return gen_rtx_PARALLEL (mode, gen_rtvec_v (k, rvec));
+}
+
/* Determine where to put an argument to a function.
Value is zero to push the argument on the stack,
or a hard register in which to store the argument.
}
if (USE_ALTIVEC_FOR_ARG_P (cum, mode, named))
- if (TARGET_64BIT && ! cum->prototype)
- {
- /* Vector parameters get passed in vector register
- and also in GPRs or memory, in absence of prototype. */
- int align_words;
- rtx slot;
- align_words = (cum->words + 1) & ~1;
+ {
+ rtx rvec[GP_ARG_NUM_REG + 1];
+ rtx r;
+ int k = 0;
- if (align_words >= GP_ARG_NUM_REG)
- {
- slot = NULL_RTX;
- }
- else
- {
- slot = gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words);
- }
- return gen_rtx_PARALLEL (mode,
- gen_rtvec (2,
- gen_rtx_EXPR_LIST (VOIDmode,
- slot, const0_rtx),
- gen_rtx_EXPR_LIST (VOIDmode,
- gen_rtx_REG (mode, cum->vregno),
- const0_rtx)));
- }
- else
- return gen_rtx_REG (mode, cum->vregno);
+ /* Do we also need to pass this argument in the parameter
+ save area? */
+ if (TARGET_64BIT && ! cum->prototype)
+ {
+ int align_words = (cum->words + 1) & ~1;
+ k = rs6000_psave_function_arg (mode, type, align_words, rvec);
+ }
+
+ /* Describe where this argument goes in the vector registers. */
+ r = gen_rtx_REG (mode, cum->vregno);
+ rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, const0_rtx);
+
+ return rs6000_finish_function_arg (mode, rvec, k);
+ }
else if (TARGET_ALTIVEC_ABI
&& (ALTIVEC_OR_VSX_VECTOR_MODE (mode)
|| (type && TREE_CODE (type) == VECTOR_TYPE
{
rtx rvec[GP_ARG_NUM_REG + 1];
rtx r;
- int k;
- bool needs_psave;
+ int k = 0;
enum machine_mode fmode = mode;
unsigned long n_fpreg = (GET_MODE_SIZE (mode) + 7) >> 3;
- if (cum->fregno + n_fpreg > FP_ARG_MAX_REG + 1)
- {
- /* Currently, we only ever need one reg here because complex
- doubles are split. */
- gcc_assert (cum->fregno == FP_ARG_MAX_REG
- && (fmode == TFmode || fmode == TDmode));
-
- /* Long double or _Decimal128 split over regs and memory. */
- fmode = DECIMAL_FLOAT_MODE_P (fmode) ? DDmode : DFmode;
- }
-
- /* Do we also need to pass this arg in the parameter save
- area? */
- needs_psave = (type
- && (cum->nargs_prototype <= 0
- || (DEFAULT_ABI == ABI_AIX
- && TARGET_XL_COMPAT
- && align_words >= GP_ARG_NUM_REG)));
+ /* Do we also need to pass this argument in the parameter
+ save area? */
+ if (type && (cum->nargs_prototype <= 0
+ || (DEFAULT_ABI == ABI_AIX
+ && TARGET_XL_COMPAT
+ && align_words >= GP_ARG_NUM_REG)))
+ k = rs6000_psave_function_arg (mode, type, align_words, rvec);
- if (!needs_psave && mode == fmode)
- return gen_rtx_REG (fmode, cum->fregno);
+ /* Describe where this argument goes in the fprs. */
- k = 0;
- if (needs_psave)
+ /* Check if the argument is split over registers and memory.
+ This can only ever happen for long double or _Decimal128;
+ complex types are handled via split_complex_arg. */
+ if (cum->fregno + n_fpreg > FP_ARG_MAX_REG + 1)
{
- /* Describe the part that goes in gprs or the stack.
- This piece must come first, before the fprs. */
- if (align_words < GP_ARG_NUM_REG)
- {
- unsigned long n_words = rs6000_arg_size (mode, type);
-
- if (align_words + n_words > GP_ARG_NUM_REG
- || (TARGET_32BIT && TARGET_POWERPC64))
- {
- /* If this is partially on the stack, then we only
- include the portion actually in registers here. */
- enum machine_mode rmode = TARGET_32BIT ? SImode : DImode;
- rtx off;
- int i = 0;
- if (align_words + n_words > GP_ARG_NUM_REG)
- /* Not all of the arg fits in gprs. Say that it
- goes in memory too, using a magic NULL_RTX
- component. Also see comment in
- rs6000_mixed_function_arg for why the normal
- function_arg_partial_nregs scheme doesn't work
- in this case. */
- rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX,
- const0_rtx);
- do
- {
- r = gen_rtx_REG (rmode,
- GP_ARG_MIN_REG + align_words);
- off = GEN_INT (i++ * GET_MODE_SIZE (rmode));
- rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, off);
- }
- while (++align_words < GP_ARG_NUM_REG && --n_words != 0);
- }
- else
- {
- /* The whole arg fits in gprs. */
- r = gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words);
- rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, const0_rtx);
- }
- }
- else
- /* It's entirely in memory. */
- rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX, const0_rtx);
+ gcc_assert (fmode == TFmode || fmode == TDmode);
+ fmode = DECIMAL_FLOAT_MODE_P (fmode) ? DDmode : DFmode;
}
- /* Describe where this piece goes in the fprs. */
r = gen_rtx_REG (fmode, cum->fregno);
rvec[k++] = gen_rtx_EXPR_LIST (VOIDmode, r, const0_rtx);
- return gen_rtx_PARALLEL (mode, gen_rtvec_v (k, rvec));
+ return rs6000_finish_function_arg (mode, rvec, k);
}
else if (align_words < GP_ARG_NUM_REG)
{
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