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Implement more instructions.

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This commit is contained in:
losfair
2019-03-31 00:44:02 +08:00
parent 0f26ee40de
commit 6ac81a3c84
3 changed files with 323 additions and 10 deletions
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38
lib/dynasm-backend/src/machine.rs
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@ -25,8 +25,6 @@ impl Machine {
pub fn pick_gpr(&self) -> Option<GPR> {
use GPR::*;
static REGS: &'static [GPR] = &[
RCX,
RDX,
RBX,
RSI,
RDI,
@ -34,6 +32,8 @@ impl Machine {
R9,
R10,
R11,
R12,
R13,
];
for r in REGS {
if !self.used_gprs.contains(r) {
@ -50,8 +50,8 @@ impl Machine {
use GPR::*;
static REGS: &'static [GPR] = &[
RAX,
R12,
R13,
RCX,
RDX,
R14,
R15
];
@ -129,6 +129,34 @@ impl Machine {
assert_eq!(self.used_xmms.remove(&xmm), true);
}
/// Acquires stack locations from the machine state.
pub fn acquire_stack_locations<E: Emitter>(
&mut self,
assembler: &mut E,
n: usize,
zeroed: bool,
) -> Vec<Location> {
let mut ret = vec![];
let mut delta_stack_offset: usize = 0;
for _ in 0..n {
let loc = {
self.stack_offset.0 += 8;
delta_stack_offset += 8;
Location::Memory(GPR::RBP, -(self.stack_offset.0 as i32))
};
ret.push(loc);
}
assembler.emit_sub(Size::S64, Location::Imm32(delta_stack_offset as u32), Location::GPR(GPR::RSP));
if zeroed {
for i in 0..n {
assembler.emit_mov(Size::S64, Location::Imm32(0), ret[i]);
}
}
ret
}
/// Acquires locations from the machine state.
///
/// If the returned locations are used for stack value, `release_location` needs to be called on them;
@ -173,7 +201,7 @@ impl Machine {
assembler.emit_sub(Size::S64, Location::Imm32(delta_stack_offset as u32), Location::GPR(GPR::RSP));
if zeroed {
for i in 0..tys.len() {
assembler.emit_mov(Size::S64, Location::Imm32(0), Location::Memory(GPR::RSP, (i * 8) as i32));
assembler.emit_mov(Size::S64, Location::Imm32(0), ret[i]);
}
}
ret