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Begin work in %flags.zf et al

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gingerBill
2026-08-17 12:25:17 +01:00
parent 344e8afa36
commit db94c5a6cb
5 changed files with 115 additions and 6 deletions
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36
core/rexcode/isa/x86/tablegen/cpp-compiler/cpp-gen.odin
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@@ -219,6 +219,42 @@ main :: proc() {
return \"<reg>\";
}
i32 flag_bit_from_name(String const &name, i32 *width_) {
static const struct {String name; i32 bit; } table[] = {
{str_lit(\"cf\"), 0}, // Carry
{str_lit(\"pf\"), 2}, // Parity
{str_lit(\"af\"), 4}, // Auxiliary Carry
{str_lit(\"zf\"), 6}, // Zero
{str_lit(\"sf\"), 7}, // Sign
{str_lit(\"tf\"), 8}, // Trap
{str_lit(\"if\"), 9}, // Interrupt Enable
{str_lit(\"df\"), 10}, // Direction
{str_lit(\"of\"), 11}, // Overflow
{str_lit(\"iopl\"),12}, // I/O Privilege Level (2-bit field: bits 12-13, low bit)
{str_lit(\"nt\"), 14}, // Nested Task
{str_lit(\"rf\"), 16}, // Resume
{str_lit(\"vm\"), 17}, // Virtual-8086 Mode
{str_lit(\"ac\"), 18}, // Alignment Check / Access Control
{str_lit(\"vif\"), 19}, // Virtual Interrupt Flag
{str_lit(\"vip\"), 20}, // Virtual Interrupt Pending
{str_lit(\"id\"), 21}, // Identification
};
for (auto const &t : table) {
if (name == t.name) {
if (width_) {
if (t.name == \"iopl\") {
*width_ = 2;
} else {
*width_ = 1;
}
}
return t.bit;
}
}
return -1;
}
struct Clobber {
OperandSet written;
OperandSet read;