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Auto-generate some documentation

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This commit is contained in:
Justine Tunney 2020-12-26 02:09:07 -08:00
parent 117d0111ab
commit 13437dd19b
97 changed files with 2033 additions and 661 deletions
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36
third_party/chibicc/codegen.c vendored
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@ -2265,7 +2265,7 @@ static void emit_data(Obj *prog) {
}
}
static void store_fp(int r, int offset, int sz) {
static void store_fp(Obj *fn, int r, int offset, int sz) {
switch (sz) {
case 4:
println("\tmovss\t%%xmm%d,%d(%%rbp)", r, offset);
@ -2274,7 +2274,8 @@ static void store_fp(int r, int offset, int sz) {
println("\tmovsd\t%%xmm%d,%d(%%rbp)", r, offset);
return;
case 16:
println("\tmovaps\t%%xmm%d,%d(%%rbp)", r, offset);
println("\t%s\t%%xmm%d,%d(%%rbp)",
fn->is_force_align_arg_pointer ? "movups" : "movaps", r, offset);
return;
}
UNREACHABLE();
@ -2381,13 +2382,13 @@ static void emit_text(Obj *prog) {
case TY_UNION:
assert(ty->size <= 16);
if (has_flonum(ty, 0, 8, 0)) {
store_fp(fp++, var->offset, MIN(8, ty->size));
store_fp(fn, fp++, var->offset, MIN(8, ty->size));
} else {
store_gp(gp++, var->offset, MIN(8, ty->size));
}
if (ty->size > 8) {
if (has_flonum(ty, 8, 16, 0)) {
store_fp(fp++, var->offset + 8, ty->size - 8);
store_fp(fn, fp++, var->offset + 8, ty->size - 8);
} else {
store_gp(gp++, var->offset + 8, ty->size - 8);
}
@ -2395,7 +2396,7 @@ static void emit_text(Obj *prog) {
break;
case TY_FLOAT:
case TY_DOUBLE:
store_fp(fp++, var->offset, ty->size);
store_fp(fn, fp++, var->offset, ty->size);
break;
case TY_INT128:
store_gp(gp++, var->offset + 0, 8);
@ -2405,6 +2406,20 @@ static void emit_text(Obj *prog) {
store_gp(gp++, var->offset, ty->size);
}
}
if (fn->is_force_align_arg_pointer) {
emitlin("\tand\t$-16,%rsp");
}
if (fn->is_no_caller_saved_registers) {
emitlin("\
\tpush\t%rdi\n\
\tpush\t%rsi\n\
\tpush\t%rdx\n\
\tpush\t%rcx\n\
\tpush\t%r8\n\
\tpush\t%r9\n\
\tpush\t%r10\n\
\tpush\t%r11");
}
// Emit code
gen_stmt(fn->body);
assert(!depth);
@ -2420,6 +2435,17 @@ static void emit_text(Obj *prog) {
if (fn->is_noreturn) {
emitlin("\tud2");
} else {
if (fn->is_no_caller_saved_registers) {
emitlin("\
\tpop\t%r11\n\
\tpop\t%r10\n\
\tpop\t%r9\n\
\tpop\t%r8\n\
\tpop\t%rcx\n\
\tpop\t%rdx\n\
\tpop\t%rsi\n\
\tpop\t%rdi");
}
emitlin("\tleave");
emitlin("\tret");
}