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Improve documentation

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The Cosmo API documentation page is pretty good now
https://justine.lol/cosmopolitan/documentation.html
This commit is contained in:
Justine Tunney 2020-12-27 07:02:35 -08:00
parent 13437dd19b
commit 1bc3a25505
367 changed files with 2542 additions and 26178 deletions
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78
third_party/chibicc/codegen.c vendored
View file

@ -973,6 +973,12 @@ static bool gen_builtin_funcall(Node *node, const char *name) {
pop("%rax");
return true;
}
} else if (!strcmp(name, "logbl")) {
gen_expr(node->args);
emitlin("\
\tfxtract\n\
\tfstp\t%st");
return true;
} else if (!strcmp(name, "isgreater")) {
gen_comis(node, "comisd", 1, 0, "a");
return true;
@ -1010,17 +1016,17 @@ static bool gen_builtin_funcall(Node *node, const char *name) {
\tflds\t(%rsp)\n\
\tpop\t%rax");
return true;
} else if (!strcmp(name, "inff")) {
} else if (!strcmp(name, "inff") || !strcmp(name, "huge_valf")) {
emitlin("\
\tmov\t$0x7f800000,%eax\n\
\tmovd\t%eax,%xmm0");
return true;
} else if (!strcmp(name, "inf")) {
} else if (!strcmp(name, "inf") || !strcmp(name, "huge_val")) {
emitlin("\
\tmov\t$0x7ff0000000000000,%rax\n\
\tmovq\t%rax,%xmm0");
return true;
} else if (!strcmp(name, "infl")) {
} else if (!strcmp(name, "infl") || !strcmp(name, "huge_vall")) {
emitlin("\
\tpush\t$0x7f800000\n\
\tflds\t(%rsp)\n\
@ -2304,6 +2310,42 @@ static void store_gp(int r, int offset, int sz) {
}
}
static void emit_function_hook(void) {
if (opt_nop_mcount) {
print_profiling_nop();
} else if (opt_fentry) {
emitlin("\tcall\t__fentry__@gotpcrel(%rip)");
} else if (opt_pg) {
emitlin("\tcall\tmcount@gotpcrel(%rip)");
} else {
print_profiling_nop();
}
}
static void save_caller_saved_registers(void) {
emitlin("\
\tpush\t%rdi\n\
\tpush\t%rsi\n\
\tpush\t%rdx\n\
\tpush\t%rcx\n\
\tpush\t%r8\n\
\tpush\t%r9\n\
\tpush\t%r10\n\
\tpush\t%r11");
}
static void restore_caller_saved_registers(void) {
emitlin("\
\tpop\t%r11\n\
\tpop\t%r10\n\
\tpop\t%r9\n\
\tpop\t%r8\n\
\tpop\t%rcx\n\
\tpop\t%rdx\n\
\tpop\t%rsi\n\
\tpop\t%rdi");
}
static void emit_text(Obj *prog) {
for (Obj *fn = prog; fn; fn = fn->next) {
if (!fn->is_function || !fn->is_definition) continue;
@ -2327,14 +2369,8 @@ static void emit_text(Obj *prog) {
// Prologue
emitlin("\tpush\t%rbp");
emitlin("\tmov\t%rsp,%rbp");
if (opt_nop_mcount) {
print_profiling_nop();
} else if (opt_fentry) {
emitlin("\tcall\t__fentry__@gotpcrel(%rip)");
} else if (opt_pg) {
emitlin("\tcall\tmcount@gotpcrel(%rip)");
} else {
print_profiling_nop();
if (!fn->is_no_instrument_function) {
emit_function_hook();
}
println("\tsub\t$%d,%%rsp", fn->stack_size);
println("\tmov\t%%rsp,%d(%%rbp)", fn->alloca_bottom->offset);
@ -2410,15 +2446,7 @@ static void emit_text(Obj *prog) {
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");
save_caller_saved_registers();
}
// Emit code
gen_stmt(fn->body);
@ -2436,15 +2464,7 @@ static void emit_text(Obj *prog) {
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");
restore_caller_saved_registers();
}
emitlin("\tleave");
emitlin("\tret");