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Code Issues 1 Releases Wiki Activity

More work on function calls.

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This commit is contained in:
Calvin Rose 2024-06-07 20:20:16 -05:00
parent 9d7a279999
commit 3995fa86e2
1 changed files with 40 additions and 8 deletions
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48
src/core/sysir_x86.c
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@ -174,18 +174,18 @@ JanetSysSpill *assign_registers(JanetSysIR *ir, JanetTable *assignments,
static void do_spills(JanetBuffer *buffer, JanetSysSpill *spills, uint32_t index) {
JanetSysSpill spill = spills[index];
for (int spi = 0; spi < 3; spi++) {
if (spill.spills[spi] == JANET_SYS_SPILL_READ || spill.spills[spi] == JANET_SYS_SPILL_BOTH) {
// emit load
uint32_t reg = spill.regs[spi];
void *x = (void *) 0x123456;
janet_formatb(buffer, "load r%u from %v ; SPILL\n", reg, janet_wrap_pointer(x));
}
if (spill.spills[spi] == JANET_SYS_SPILL_WRITE || spill.spills[spi] == JANET_SYS_SPILL_BOTH) {
// emit store
uint32_t reg = spill.regs[spi];
void *x = (void *) 0x123456;
janet_formatb(buffer, "store r%u to %v ; SPILL\n", reg, janet_wrap_pointer(x));
}
if (spill.spills[spi] == JANET_SYS_SPILL_READ || spill.spills[spi] == JANET_SYS_SPILL_BOTH) {
// emit load
uint32_t reg = spill.regs[spi];
void *x = (void *) 0x123456;
janet_formatb(buffer, "load r%u from %v ; SPILL\n", reg, janet_wrap_pointer(x));
}
}
}
@ -196,7 +196,7 @@ void janet_sys_ir_lower_to_x64(JanetSysIRLinkage *linkage, JanetBuffer *buffer)
JanetSysIR *ir = janet_unwrap_pointer(linkage->ir_ordered->data[i]);
JanetTable *assignments = janet_table(0);
/* 16 total 64 bit registers - 3 temp */
JanetSysSpill *spills = assign_registers(ir, assignments, 13);
JanetSysSpill *spills = assign_registers(ir, assignments, 113);
/* Emit prelude */
if (ir->link_name != NULL) {
@ -216,6 +216,7 @@ void janet_sys_ir_lower_to_x64(JanetSysIRLinkage *linkage, JanetBuffer *buffer)
case JANET_SYSOP_TYPE_BIND:
case JANET_SYSOP_TYPE_ARRAY:
case JANET_SYSOP_TYPE_POINTER:
case JANET_SYSOP_ARG:
/* Non synthesized instructions */
break;
case JANET_SYSOP_POINTER_ADD:
@ -274,7 +275,38 @@ void janet_sys_ir_lower_to_x64(JanetSysIRLinkage *linkage, JanetBuffer *buffer)
v2reg(assignments, instruction.branch.cond));
break;
case JANET_SYSOP_CALLK:
do_spills(buffer, spills, j);
case JANET_SYSOP_CALL:
;
/* Strange iteration is to iterate the arguments in reverse order */
for (int32_t argo = instruction.call.arg_count - 1; argo >= 0; argo -= 3) {
int32_t offset = argo / 3;
int32_t sub_count = 3;
while (offset * 3 + sub_count >= (int32_t) instruction.call.arg_count) {
sub_count--;
}
JanetSysInstruction arg_instruction = ir->instructions[j + offset];
do_spills(buffer, spills, j + offset);
for (int x = sub_count; x >= 0; x--) {
janet_formatb(buffer, "push r%u\n", v2reg(assignments, arg_instruction.arg.args[x]));
}
}
if (instruction.opcode == JANET_SYSOP_CALLK) {
if (instruction.callk.has_dest) {
janet_formatb(buffer, "r%u = call %p\n", v2reg(assignments, instruction.callk.dest),
ir->constants[instruction.callk.constant]);
} else {
janet_formatb(buffer, "call %p\n",
ir->constants[instruction.callk.constant]);
}
} else {
if (instruction.call.has_dest) {
janet_formatb(buffer, "r%u = call r%u\n", v2reg(assignments, instruction.call.dest),
v2reg(assignments, instruction.call.callee));
} else {
janet_formatb(buffer, "call r%u\n",
v2reg(assignments, instruction.call.callee));
}
}
break;
// On a comparison, if next instruction is branch that reads from dest, combine into a single op.
}