rtx
nds32_expand_store_multiple (int base_regno, int count,
rtx base_addr, rtx basemem,
bool update_base_reg_p,
rtx *update_base_reg)
{
int par_index;
int offset;
int start_idx;
rtx result;
rtx new_addr, mem, reg;
if (count == 1)
{
reg = gen_rtx_REG (SImode, base_regno);
if (update_base_reg_p)
{
*update_base_reg = gen_reg_rtx (SImode);
return gen_unaligned_store_update_base_w (*update_base_reg, base_addr, reg);
}
else
return gen_unaligned_store_w (gen_rtx_MEM (SImode, base_addr), reg);
}
/* Create the pattern that is presented in nds32-multiple.md. */
if (update_base_reg_p)
{
result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count + 1));
start_idx = 1;
}
else
{
result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count));
start_idx = 0;
}
if (update_base_reg_p)
{
offset = count * 4;
new_addr = plus_constant (Pmode, base_addr, offset);
*update_base_reg = gen_reg_rtx (SImode);
XVECEXP (result, 0, 0) = gen_rtx_SET (*update_base_reg, new_addr);
}
for (par_index = 0; par_index < count; par_index++)
{
offset = par_index * 4;
/* 4-byte for storing data to memory. */
new_addr = plus_constant (Pmode, base_addr, offset);
mem = adjust_automodify_address_nv (basemem, SImode,
new_addr, offset);
reg = gen_rtx_REG (SImode, base_regno + par_index);
XVECEXP (result, 0, par_index + start_idx) = gen_rtx_SET (mem, reg);
}
return result;
}
rtx
nds32_expand_store_multiple (int base_regno, int count,
rtx base_addr, rtx basemem)
{
int par_index;
int offset;
rtx result;
rtx new_addr, mem, reg;
/* Create the pattern that is presented in nds32-multiple.md. */
result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count));
for (par_index = 0; par_index < count; par_index++)
{
offset = par_index * 4;
/* 4-byte for storing data to memory. */
new_addr = plus_constant (Pmode, base_addr, offset);
mem = adjust_automodify_address_nv (basemem, SImode,
new_addr, offset);
reg = gen_rtx_REG (SImode, base_regno + par_index);
XVECEXP (result, 0, par_index) = gen_rtx_SET (mem, reg);
}
return result;
}
/* Functions to expand load_multiple and store_multiple.
They are auxiliary extern functions to help create rtx template.
Check nds32-multiple.md file for the patterns. */
rtx
nds32_expand_load_multiple (int base_regno, int count,
rtx base_addr, rtx basemem,
bool update_base_reg_p,
rtx *update_base_reg)
{
int par_index;
int offset;
int start_idx;
rtx result;
rtx new_addr, mem, reg;
/* Generate a unaligned load to prevent load instruction pull out from
parallel, and then it will generate lwi, and lose unaligned acces */
if (count == 1)
{
reg = gen_rtx_REG (SImode, base_regno);
if (update_base_reg_p)
{
*update_base_reg = gen_reg_rtx (SImode);
return gen_unaligned_load_update_base_w (*update_base_reg, reg, base_addr);
}
else
return gen_unaligned_load_w (reg, gen_rtx_MEM (SImode, base_addr));
}
/* Create the pattern that is presented in nds32-multiple.md. */
if (update_base_reg_p)
{
result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count + 1));
start_idx = 1;
}
else
{
result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count));
start_idx = 0;
}
if (update_base_reg_p)
{
offset = count * 4;
new_addr = plus_constant (Pmode, base_addr, offset);
*update_base_reg = gen_reg_rtx (SImode);
XVECEXP (result, 0, 0) = gen_rtx_SET (*update_base_reg, new_addr);
}
for (par_index = 0; par_index < count; par_index++)
{
offset = par_index * 4;
/* 4-byte for loading data to each register. */
new_addr = plus_constant (Pmode, base_addr, offset);
mem = adjust_automodify_address_nv (basemem, SImode,
new_addr, offset);
reg = gen_rtx_REG (SImode, base_regno + par_index);
XVECEXP (result, 0, (par_index + start_idx)) = gen_rtx_SET (reg, mem);
}
return result;
}
