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#include <assert.h>
#include <stdlib.h>
#include <qbt/abi.h>
static const int64_t ar_map[] = {
RA0, RA1, RA2, RA3, RA4, RA5, RA6, RA7, RA8, RA9,
RA10, RA11, RA12, RA13, RA14, RA15, RA16, RA17, RA18, RA19,
RA20, RA21, RA22, RA23, RA24
};
static struct val nth_ar(int64_t nth)
{
return reg_val(ar_map[nth]);
}
static struct insn rewrite_param(struct insn n)
{
assert(n.type == PARAM);
assert(n.in[1].class == IMM);
int64_t nth_param = n.in[1].v;
assert(nth_param >= 0 && nth_param < 25
&& "stack argument passing not yet supported");
return insn_create(MOVE, I27, n.out, nth_ar(nth_param), noclass());
}
static struct insn rewrite_retval(struct insn n)
{
assert(n.type == RETVAL);
assert(n.in[1].class == IMM);
int64_t nth_retval = n.in[1].v;
assert(nth_retval >= 0 && nth_retval < 25);
return insn_create(MOVE, I27, n.out, nth_ar(nth_retval), noclass());
}
static struct insn rewrite_arg(struct insn n)
{
assert(n.type == ARG);
assert(n.in[1].class == IMM);
int64_t nth_arg = n.in[1].v;
assert(nth_arg >= 0 && nth_arg < 25);
if (n.in[0].class == TMP || n.in[0].class == REG)
return insn_create(MOVE, I27, nth_ar(nth_arg), n.in[0],
noclass());
else if (n.in[0].class == IMM || n.in[0].class == REF)
return insn_create(COPY, I27, nth_ar(nth_arg), n.in[0],
noclass());
assert("illegal arg type");
abort();
}
static struct insn rewrite_retarg(struct insn n)
{
assert(n.type == RETARG);
assert(n.in[1].class == IMM);
int64_t nth_arg = n.in[1].v;
assert(nth_arg >= 0 && nth_arg < 25);
if (n.in[0].class == TMP || n.in[0].class == REG)
return insn_create(MOVE, I27, nth_ar(nth_arg), n.in[0],
noclass());
else if (n.in[0].class == IMM || n.in[0].class == REF)
return insn_create(COPY, I27, nth_ar(nth_arg), n.in[0],
noclass());
assert("illegal retval type");
abort();
}
void abi0(struct fn *f)
{
foreach_blk(bi, f->blks) {
struct blk *b = blk_at(f->blks, bi);
foreach_insn(i, b->insns) {
struct insn n = insn_at(b->insns, i);
if (n.type == PARAM) {
struct insn p = rewrite_param(n);
insn_at(b->insns, i) = p;
}
else if (n.type == RETVAL) {
struct insn r = rewrite_retval(n);
insn_at(b->insns, i) = r;
}
else if (n.type == ARG) {
struct insn a = rewrite_arg(n);
insn_at(b->insns, i) = a;
}
else if (n.type == RETARG) {
struct insn a = rewrite_retarg(n);
insn_at(b->insns, i) = a;
}
}
}
}
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