mirror of
https://github.com/italicsjenga/gba.git
synced 2024-12-24 03:11:29 +11:00
Remove usage of global_asm (#175)
* message * finish memory function re-arrangement.
This commit is contained in:
Lokathor
GitHub
parent
eb5995bf1d
commit
8385504db6
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@ -13,7 +13,7 @@ track_caller = []
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[dependencies]
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[dependencies]
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bitfrob = "0.2.3"
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bitfrob = "0.2.3"
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voladdress = { version = "1.2.1", features = ["experimental_volregion"] }
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voladdress = { version = "1.2.1", features = ["experimental_volregion"] }
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bracer = "0.1"
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bracer = "0.1.2"
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[profile.dev]
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[profile.dev]
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opt-level = 3
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opt-level = 3
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36
examples/asm_viewer.rs
Normal file
36
examples/asm_viewer.rs
Normal file
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@ -0,0 +1,36 @@
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#![no_std]
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#![no_main]
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use gba::mem_fns::*;
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#[panic_handler]
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fn panic_handler(_: &core::panic::PanicInfo) -> ! {
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loop {}
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}
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#[no_mangle]
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extern "C" fn main() -> ! {
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let dest = unsafe { (0x0400_0000 as *const u16).read_volatile() };
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let src = unsafe { (0x0400_0000 as *const u16).read_volatile() };
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let count = unsafe { (0x0400_0000 as *const u16).read_volatile() };
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unsafe {
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__aeabi_memcpy1(dest as *mut u8, src as *mut u8, count as usize);
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__aeabi_memcpy2(dest as *mut u16, src as *mut u16, count as usize);
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__aeabi_memcpy4(dest as *mut u32, src as *mut u32, count as usize);
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__aeabi_memcpy8(dest as *mut u32, src as *mut u32, count as usize);
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__aeabi_memcpy(dest as *mut u8, src as *mut u8, count as usize);
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memcpy(dest as *mut u8, src as *mut u8, count as usize);
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__aeabi_memmove4(dest as *mut u32, src as *mut u32, count as usize);
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__aeabi_memmove8(dest as *mut u32, src as *mut u32, count as usize);
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__aeabi_memmove(dest as *mut u8, src as *mut u8, count as usize);
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memmove(dest as *mut u8, src as *mut u8, count as usize);
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__aeabi_memset4(dest as *mut u32, count as usize, count as i32);
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__aeabi_memset8(dest as *mut u32, count as usize, count as i32);
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__aeabi_memset(dest as *mut u8, count as usize, count as i32);
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memset(dest as *mut u8, count as i32, count as usize);
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__aeabi_memclr4(dest as *mut u32, count as usize);
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__aeabi_memclr8(dest as *mut u32, count as usize);
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__aeabi_memclr(dest as *mut u8, count as usize);
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}
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loop {}
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}
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@ -1,11 +1,11 @@
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#![no_std]
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#![no_std]
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#![no_main]
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#![no_main]
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use core::fmt::Write;
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use gba::prelude::*;
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use gba::prelude::*;
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#[panic_handler]
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#[panic_handler]
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fn panic_handler(info: &core::panic::PanicInfo) -> ! {
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fn panic_handler(info: &core::panic::PanicInfo) -> ! {
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use core::fmt::Write;
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if let Ok(mut logger) = MgbaBufferedLogger::try_new(MgbaMessageLevel::Fatal) {
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if let Ok(mut logger) = MgbaBufferedLogger::try_new(MgbaMessageLevel::Fatal) {
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writeln!(logger, "{info}").ok();
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writeln!(logger, "{info}").ok();
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}
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}
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@ -9,8 +9,6 @@
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//! * If a function is set in the `RUST_IRQ_HANDLER` variable then that function
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//! * If a function is set in the `RUST_IRQ_HANDLER` variable then that function
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//! will be called and passed the bits for which interrupt(s) occurred.
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//! will be called and passed the bits for which interrupt(s) occurred.
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use core::ffi::c_void;
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use crate::{
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use crate::{
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dma::DmaControl,
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dma::DmaControl,
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gba_cell::GbaCell,
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gba_cell::GbaCell,
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@ -18,7 +16,6 @@ use crate::{
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mgba::MGBA_LOGGING_ENABLE_REQUEST,
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mgba::MGBA_LOGGING_ENABLE_REQUEST,
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mmio::{DMA3_SRC, IME, MGBA_LOG_ENABLE},
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mmio::{DMA3_SRC, IME, MGBA_LOG_ENABLE},
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};
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};
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use bracer::*;
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/// The function pointer that the assembly runtime calls when an interrupt
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/// The function pointer that the assembly runtime calls when an interrupt
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/// occurs.
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/// occurs.
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@ -46,7 +43,7 @@ unsafe extern "C" fn __start() -> ! {
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/* iwram copy */
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/* iwram copy */
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"ldr r4, =__iwram_word_copy_count",
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"ldr r4, =__iwram_word_copy_count",
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when!("r4" != "#0" [label_id=1] {
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bracer::when!("r4" != "#0" [label_id=1] {
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"add r3, r12, #{dma3_offset}",
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"add r3, r12, #{dma3_offset}",
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"mov r5, #{dma3_setting}",
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"mov r5, #{dma3_setting}",
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"ldr r0, =__iwram_start",
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"ldr r0, =__iwram_start",
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@ -59,7 +56,7 @@ unsafe extern "C" fn __start() -> ! {
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/* ewram copy */
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/* ewram copy */
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"ldr r4, =__ewram_word_copy_count",
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"ldr r4, =__ewram_word_copy_count",
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when!("r4" != "#0" [label_id=1] {
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bracer::when!("r4" != "#0" [label_id=1] {
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"add r3, r12, #{dma3_offset}",
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"add r3, r12, #{dma3_offset}",
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"mov r5, #{dma3_setting}",
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"mov r5, #{dma3_setting}",
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"ldr r0, =__ewram_start",
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"ldr r0, =__ewram_start",
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@ -72,7 +69,7 @@ unsafe extern "C" fn __start() -> ! {
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/* bss zero */
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/* bss zero */
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"ldr r4, =__bss_word_clear_count",
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"ldr r4, =__bss_word_clear_count",
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when!("r4" != "#0" [label_id=1] {
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bracer::when!("r4" != "#0" [label_id=1] {
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"ldr r0, =__bss_start",
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"ldr r0, =__bss_start",
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"mov r2, #0",
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"mov r2, #0",
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"2:",
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"2:",
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@ -133,9 +130,9 @@ unsafe extern "C" fn runtime_irq_handler() {
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/* Call the Rust fn pointer (if set), using System mode */
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/* Call the Rust fn pointer (if set), using System mode */
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"ldr r1, ={RUST_IRQ_HANDLER}",
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"ldr r1, ={RUST_IRQ_HANDLER}",
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"ldr r1, [r1]",
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"ldr r1, [r1]",
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when!("r1" != "#0" [label_id=9] {
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bracer::when!("r1" != "#0" [label_id=9] {
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with_spsr_held_in!("r2", {
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bracer::with_spsr_held_in!("r2", {
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set_cpu_control!(System, irq_masked: false, fiq_masked: false),
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bracer::set_cpu_control!(System, irq_masked: false, fiq_masked: false),
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// Note(Lokathor): We are *SKIPPING* the part where we ensure that the
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// Note(Lokathor): We are *SKIPPING* the part where we ensure that the
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// System stack pointer is aligned to 8 during the call to the rust
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// System stack pointer is aligned to 8 during the call to the rust
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@ -145,11 +142,11 @@ unsafe extern "C" fn runtime_irq_handler() {
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// cycles total. Which is neat, but if this were on the DS (which has an
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// cycles total. Which is neat, but if this were on the DS (which has an
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// ARMv5TE CPU) you'd want to ensure the aligned stack.
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// ARMv5TE CPU) you'd want to ensure the aligned stack.
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with_pushed_registers!("{{r2, r3, r12, lr}}", {
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bracer::with_pushed_registers!("{{r2, r3, r12, lr}}", {
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adr_lr_then_bx_to!(reg="r1", label_id=1)
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bracer::adr_lr_then_bx_to!(reg="r1", label_id=1)
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}),
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}),
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set_cpu_control!(Supervisor, irq_masked: true, fiq_masked: false),
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bracer::set_cpu_control!(Supervisor, irq_masked: true, fiq_masked: false),
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}),
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}),
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}),
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}),
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@ -162,6 +159,8 @@ unsafe extern "C" fn runtime_irq_handler() {
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)
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)
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}
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}
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// For now, the division fns can just keep living here.
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/// Returns 0 in `r0`, while placing the `numerator` into `r1`.
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/// Returns 0 in `r0`, while placing the `numerator` into `r1`.
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///
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///
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/// This is written in that slightly strange way so that `div` function and
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/// This is written in that slightly strange way so that `div` function and
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@ -207,7 +206,7 @@ extern "C" fn __aeabi_uidiv(numerator: u32, denominator: u32) -> u32 {
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core::arch::asm!(
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core::arch::asm!(
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// Check for divide by 0
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// Check for divide by 0
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"cmp r1, #0",
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"cmp r1, #0",
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"beq __aeabi_idiv0",
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"beq {__aeabi_idiv0}",
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// r3(shifted_denom) = denom
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// r3(shifted_denom) = denom
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"mov r3, r1",
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"mov r3, r1",
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// while shifted_denom < (num>>1): shifted_denom =<< 1;
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// while shifted_denom < (num>>1): shifted_denom =<< 1;
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@ -228,6 +227,7 @@ extern "C" fn __aeabi_uidiv(numerator: u32, denominator: u32) -> u32 {
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"cmp r3, r1",
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"cmp r3, r1",
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"bcs 3b",
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"bcs 3b",
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"bx lr",
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"bx lr",
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__aeabi_idiv0 = sym __aeabi_idiv0,
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options(noreturn)
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options(noreturn)
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)
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)
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}
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}
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@ -253,14 +253,15 @@ extern "C" fn __aeabi_idiv(numerator: i32, denominator: i32) -> u32 {
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"rsblt r0, r0, #0",
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"rsblt r0, r0, #0",
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"cmp r1, #0",
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"cmp r1, #0",
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"rsclt r1, r1, #0",
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"rsclt r1, r1, #0",
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with_pushed_registers!("{{lr}}", {
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bracer::with_pushed_registers!("{{lr}}", {
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// divide them using `u32` division (this will check for divide by 0)
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// divide them using `u32` division (this will check for divide by 0)
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"bl __aeabi_uidiv",
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"bl {__aeabi_uidiv}",
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}),
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}),
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// if they started as different signs, flip the output's sign.
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// if they started as different signs, flip the output's sign.
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"cmp r12, #0",
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"cmp r12, #0",
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"rsblt r0, r0, #0",
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"rsblt r0, r0, #0",
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"bx lr",
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"bx lr",
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__aeabi_uidiv = sym __aeabi_uidiv,
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options(noreturn)
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options(noreturn)
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)
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)
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}
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}
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@ -289,14 +290,15 @@ extern "C" fn __aeabi_uidivmod(numerator: u32, denominator: u32) -> u64 {
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// touch `r12`, while the other will be pushed onto the stack along with
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// touch `r12`, while the other will be pushed onto the stack along with
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// `lr`. Since the function's output will be in `r0`, we push/pop `r1`.
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// `lr`. Since the function's output will be in `r0`, we push/pop `r1`.
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"mov r12, r0",
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"mov r12, r0",
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with_pushed_registers!("{{r1, lr}}", {
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bracer::with_pushed_registers!("{{r1, lr}}", {
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"bl __aeabi_uidiv",
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"bl {__aeabi_uidiv}",
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}),
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}),
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// Now r0 holds the `quot`, and we use it along with the input args to
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// Now r0 holds the `quot`, and we use it along with the input args to
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// calculate the `rem`.
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// calculate the `rem`.
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"mul r2, r0, r1",
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"mul r2, r0, r1",
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"sub r1, r12, r2",
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"sub r1, r12, r2",
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"bx lr",
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"bx lr",
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__aeabi_uidiv = sym __aeabi_uidiv,
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options(noreturn)
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options(noreturn)
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)
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)
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}
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}
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@ -320,7 +322,7 @@ extern "C" fn __aeabi_uidivmod(numerator: u32, denominator: u32) -> u64 {
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extern "C" fn __aeabi_idivmod(numerator: i32, denominator: i32) -> u64 {
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extern "C" fn __aeabi_idivmod(numerator: i32, denominator: i32) -> u64 {
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unsafe {
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unsafe {
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core::arch::asm!(
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core::arch::asm!(
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with_pushed_registers!("{{r4, r5, lr}}", {
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bracer::with_pushed_registers!("{{r4, r5, lr}}", {
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// store old numerator then make it the unsigned absolute
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// store old numerator then make it the unsigned absolute
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"movs r4, r0",
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"movs r4, r0",
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"rsblt r0, r0, #0",
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"rsblt r0, r0, #0",
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@ -328,7 +330,7 @@ extern "C" fn __aeabi_idivmod(numerator: i32, denominator: i32) -> u64 {
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"movs r5, r1",
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"movs r5, r1",
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"rsblt r1, r1, #0",
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"rsblt r1, r1, #0",
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// divmod using unsigned.
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// divmod using unsigned.
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"bl __aeabi_uidivmod",
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"bl {__aeabi_uidivmod}",
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// if signs started opposite, quot becomes negative
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// if signs started opposite, quot becomes negative
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"eors r12, r4, r5",
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"eors r12, r4, r5",
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"rsblt r0, r0, #0",
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"rsblt r0, r0, #0",
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@ -337,534 +339,8 @@ extern "C" fn __aeabi_idivmod(numerator: i32, denominator: i32) -> u64 {
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"rsblt r1, r1, #0",
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"rsblt r1, r1, #0",
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}),
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}),
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"bx lr",
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"bx lr",
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__aeabi_uidivmod = sym __aeabi_uidivmod,
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options(noreturn)
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options(noreturn)
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)
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)
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}
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}
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}
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}
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/// Reads 4 bytes, starting at the address given.
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///
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/// See [__aeabi_uread4]
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///
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/// [__aeabi_uread4]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
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#[naked]
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#[no_mangle]
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#[instruction_set(arm::a32)]
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#[link_section = ".iwram.aeabi.uread4"]
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unsafe extern "C" fn __aeabi_uread4(address: *const c_void) -> u32 {
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core::arch::asm!(
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"ldrb r2, [r0]",
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"ldrb r3, [r0, #1]",
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"orr r2, r2, r3, lsl #8",
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"ldrb r3, [r0, #2]",
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"orr r2, r2, r3, lsl #16",
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"ldrb r3, [r0, #3]",
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"orr r2, r2, r3, lsl #24",
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"mov r0, r2",
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"bx lr",
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options(noreturn),
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)
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}
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/// Writes 4 bytes, starting at the address given.
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///
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/// See [__aeabi_uwrite4]
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///
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/// [__aeabi_uwrite4]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
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#[naked]
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#[no_mangle]
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#[instruction_set(arm::a32)]
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#[link_section = ".iwram.aeabi.uwrite4"]
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unsafe extern "C" fn __aeabi_uwrite4(value: u32, address: *mut c_void) {
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core::arch::asm!(
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"strb r0, [r1]",
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"lsr r2, r0, #8",
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"strb r2, [r1, #1]",
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"lsr r2, r2, #8",
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"strb r2, [r1, #2]",
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"lsr r2, r2, #8",
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"strb r2, [r1, #3]",
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"bx lr",
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options(noreturn),
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)
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}
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/// Reads 8 bytes, starting at the address given.
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///
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/// See [__aeabi_uread8]
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///
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/// [__aeabi_uread8]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
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#[naked]
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#[no_mangle]
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#[instruction_set(arm::a32)]
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#[link_section = ".iwram.aeabi.uread8"]
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|
||||||
unsafe extern "C" fn __aeabi_uread8(address: *const c_void) -> u64 {
|
|
||||||
core::arch::asm!(
|
|
||||||
"ldrb r1, [r0, #4]",
|
|
||||||
"ldrb r2, [r0, #5]",
|
|
||||||
"orr r1, r1, r2, lsl #8",
|
|
||||||
"ldrb r2, [r0, #6]",
|
|
||||||
"orr r1, r1, r2, lsl #16",
|
|
||||||
"ldrb r2, [r0, #7]",
|
|
||||||
"orr r1, r1, r2, lsl #24",
|
|
||||||
"b __aeabi_uread4",
|
|
||||||
options(noreturn),
|
|
||||||
)
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Writes 8 bytes, starting at the address given.
|
|
||||||
///
|
|
||||||
/// See [__aeabi_uwrite8]
|
|
||||||
///
|
|
||||||
/// [__aeabi_uwrite8]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
|
|
||||||
#[naked]
|
|
||||||
#[no_mangle]
|
|
||||||
#[instruction_set(arm::a32)]
|
|
||||||
#[link_section = ".iwram.aeabi.uwrite8"]
|
|
||||||
unsafe extern "C" fn __aeabi_uwrite8(value: u64, address: *mut c_void) {
|
|
||||||
core::arch::asm!(
|
|
||||||
"strb r0, [r2]",
|
|
||||||
"lsr r3, r0, #8",
|
|
||||||
"strb r3, [r2, #1]",
|
|
||||||
"lsr r3, r3, #8",
|
|
||||||
"strb r3, [r2, #2]",
|
|
||||||
"lsr r3, r3, #8",
|
|
||||||
"strb r3, [r2, #3]",
|
|
||||||
"strb r1, [r2, #4]",
|
|
||||||
"lsr r3, r1, #8",
|
|
||||||
"strb r3, [r2, #5]",
|
|
||||||
"lsr r3, r3, #8",
|
|
||||||
"strb r3, [r2, #6]",
|
|
||||||
"lsr r3, r3, #8",
|
|
||||||
"strb r3, [r2, #7]",
|
|
||||||
"bx lr",
|
|
||||||
options(noreturn),
|
|
||||||
)
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Provides a `libc` styled memory copy (transfer between exclusive regions).
|
|
||||||
///
|
|
||||||
/// This has mild overhead compared to calling [`__aeabi_memcpy`], prefer that
|
|
||||||
/// function when possible.
|
|
||||||
///
|
|
||||||
/// * **Returns:** the original `dest` pointer.
|
|
||||||
///
|
|
||||||
/// ## Safety
|
|
||||||
/// * `src` must be readable for `byte_count` bytes.
|
|
||||||
/// * `dest` must be writable for `byte_count` bytes.
|
|
||||||
/// * The `src` and `dest` regions must not overlap.
|
|
||||||
#[inline]
|
|
||||||
#[no_mangle]
|
|
||||||
pub unsafe extern "C" fn memcpy(
|
|
||||||
dest: *mut u8, src: *const u8, byte_count: usize,
|
|
||||||
) -> *mut u8 {
|
|
||||||
__aeabi_memcpy(dest, src, byte_count);
|
|
||||||
dest
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Provides a `libc` styled memory move (transfer between non-exclusive
|
|
||||||
/// regions).
|
|
||||||
///
|
|
||||||
/// This has mild overhead compared to calling [`__aeabi_memmove`], prefer that
|
|
||||||
/// function when possible.
|
|
||||||
///
|
|
||||||
/// * **Returns:** the original `dest` pointer.
|
|
||||||
///
|
|
||||||
/// ## Safety
|
|
||||||
/// * `src` must be readable for `byte_count` bytes.
|
|
||||||
/// * `dest` must be writable for `byte_count` bytes.
|
|
||||||
#[inline]
|
|
||||||
#[no_mangle]
|
|
||||||
pub unsafe extern "C" fn memmove(
|
|
||||||
dest: *mut u8, src: *const u8, byte_count: usize,
|
|
||||||
) -> *mut u8 {
|
|
||||||
__aeabi_memmove(dest, src, byte_count);
|
|
||||||
dest
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Provides a `libc` styled memory set (assign `u8` in `byte` to the entire
|
|
||||||
/// region).
|
|
||||||
///
|
|
||||||
/// This has mild overhead compared to calling [`__aeabi_memset`], prefer that
|
|
||||||
/// function when possible. Note that this function and that function have
|
|
||||||
/// slightly different argument ordering, though the compiler won't let you mess
|
|
||||||
/// it up like might happen in C.
|
|
||||||
///
|
|
||||||
/// * **Returns:** the original `dest` pointer.
|
|
||||||
///
|
|
||||||
/// ## Safety
|
|
||||||
/// * `dest` must be writable for `byte_count` bytes.
|
|
||||||
#[inline]
|
|
||||||
#[no_mangle]
|
|
||||||
pub unsafe extern "C" fn memset(
|
|
||||||
dest: *mut u8, byte: i32, byte_count: usize,
|
|
||||||
) -> *mut u8 {
|
|
||||||
__aeabi_memset(dest, byte_count, byte);
|
|
||||||
dest
|
|
||||||
}
|
|
||||||
|
|
||||||
extern "C" {
|
|
||||||
/// Memory transfer between *exclusive* regions.
|
|
||||||
///
|
|
||||||
/// There are no alignment requirements for the pointers. This will
|
|
||||||
/// automatically detect when pointers are sufficiently aligned to use `u16`
|
|
||||||
/// or `u32` transfers, instead of always using `u8` transfers.
|
|
||||||
///
|
|
||||||
/// This follows the AEABI convention of not returning the original `dest`
|
|
||||||
/// pointer at the end of the function. This actually allows a minor
|
|
||||||
/// optimization, so if you're going to call a memory copy function at all,
|
|
||||||
/// prefer this over [`memcpy`].
|
|
||||||
pub fn __aeabi_memcpy(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memcpy`], but both pointers are assumed to be aligned to 4.
|
|
||||||
pub fn __aeabi_memcpy4(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memcpy`], but both pointers are assumed to be aligned to 8.
|
|
||||||
pub fn __aeabi_memcpy8(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memcpy`], but *only* performs `u8` transfers.
|
|
||||||
///
|
|
||||||
/// Importantly, this means that this function can be used to get data to/from
|
|
||||||
/// the SRAM region.
|
|
||||||
pub fn gba_sram_memcpy(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// Memory transfer between *non-exclusive* regions.
|
|
||||||
///
|
|
||||||
/// As [`__aeabi_memcpy`], but the regions don't need to be exclusive.
|
|
||||||
pub fn __aeabi_memmove(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memmove`], but both pointers are assumed to be aligned to 4.
|
|
||||||
pub fn __aeabi_memmove4(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memmove`], but both pointers are assumed to be aligned to 8.
|
|
||||||
pub fn __aeabi_memmove8(dest: *mut u8, src: *const u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// Sets all bytes in the region to the value given.
|
|
||||||
///
|
|
||||||
/// For historical reasons, the "byte" passed in is passed as an `i32`. Still,
|
|
||||||
/// only the low 8 bits of the value are kept and written to the region.
|
|
||||||
///
|
|
||||||
/// There are no alignment requirements for the pointer. This will
|
|
||||||
/// automatically detect when pointer is sufficiently aligned to use `u16` or
|
|
||||||
/// `u32` writes, instead of always using `u8` writes.
|
|
||||||
///
|
|
||||||
/// This follows the AEABI convention of not returning the original `dest`
|
|
||||||
/// pointer at the end of the function. This actually allows a minor
|
|
||||||
/// optimization, so if you're going to call a memory copy function at all,
|
|
||||||
/// prefer this over [`memcpy`].
|
|
||||||
pub fn __aeabi_memset(dest: *mut u8, byte_count: usize, byte: i32);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memset`], but both pointers are assumed to be aligned to 4.
|
|
||||||
pub fn __aeabi_memset4(dest: *mut u8, byte_count: usize, byte: i32);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memset`], but both pointers are assumed to be aligned to 8.
|
|
||||||
pub fn __aeabi_memset8(dest: *mut u8, byte_count: usize, byte: i32);
|
|
||||||
|
|
||||||
/// Sets all bytes in the region to 0.
|
|
||||||
///
|
|
||||||
/// There are no alignment requirements for the pointer. This will
|
|
||||||
/// automatically detect when the pointer is sufficiently aligned to use `u16`
|
|
||||||
/// or `u32` writes, instead of always using `u8` writes.
|
|
||||||
pub fn __aeabi_memclr(dest: *mut u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memclr`], but the pointer is assumed to be aligned to 4.
|
|
||||||
pub fn __aeabi_memclr4(dest: *mut u8, byte_count: usize);
|
|
||||||
|
|
||||||
/// As [`__aeabi_memclr`], but the pointer is assumed to be aligned to 8.
|
|
||||||
pub fn __aeabi_memclr8(dest: *mut u8, byte_count: usize);
|
|
||||||
}
|
|
||||||
|
|
||||||
core::arch::global_asm! {
|
|
||||||
emit_a32_code!{
|
|
||||||
put_code_in_section!(".iwram.aeabi.memory.copy.and.move", {
|
|
||||||
".global __aeabi_memmove8",
|
|
||||||
".global __aeabi_memmove4",
|
|
||||||
".global __aeabi_memmove",
|
|
||||||
".global __aeabi_memcpy8",
|
|
||||||
".global __aeabi_memcpy4",
|
|
||||||
".global __aeabi_memcpy",
|
|
||||||
//
|
|
||||||
"__aeabi_memmove8:",
|
|
||||||
"__aeabi_memmove4:",
|
|
||||||
"__aeabi_memmove:",
|
|
||||||
"cmp r0, r1", // if d > s, reverse copy
|
|
||||||
"bgt .L_r_copy_gain_align",
|
|
||||||
// else fallthrough
|
|
||||||
|
|
||||||
"__aeabi_memcpy:",
|
|
||||||
".L_f_copy_gain_align:",
|
|
||||||
"eor r3, r0, r1",
|
|
||||||
"lsls r3, r3, #31",
|
|
||||||
"bmi .L_f_copy_max_coalign1",
|
|
||||||
"bcs .L_f_copy_max_coalign2",
|
|
||||||
// else fallthrough
|
|
||||||
|
|
||||||
".L_f_copy_max_coalign4:",
|
|
||||||
"tst r0, #3",
|
|
||||||
"bne .L_f_copy_fixup4",
|
|
||||||
// else fallthrough
|
|
||||||
|
|
||||||
"__aeabi_memcpy8:",
|
|
||||||
"__aeabi_memcpy4:",
|
|
||||||
".L_f_copy_coalign4_assured:",
|
|
||||||
"cmp r2, #32",
|
|
||||||
"bge .L_f_copy_block",
|
|
||||||
|
|
||||||
".L_f_copy_post_block:",
|
|
||||||
// copy 4 words, two at a time
|
|
||||||
"tst r2, #0b10000",
|
|
||||||
"ldmne r1!, {r3, r12}",
|
|
||||||
"stmne r0!, {r3, r12}",
|
|
||||||
"ldmne r1!, {r3, r12}",
|
|
||||||
"stmne r0!, {r3, r12}",
|
|
||||||
"bics r2, r2, #0b10000",
|
|
||||||
"bxeq lr",
|
|
||||||
|
|
||||||
// copy 2 and/or 1 words
|
|
||||||
"lsls r3, r2, #29",
|
|
||||||
"ldmcs r1!, {r3, r12}",
|
|
||||||
"stmcs r0!, {r3, r12}",
|
|
||||||
"ldrmi r3, [r1], #4",
|
|
||||||
"strmi r3, [r0], #4",
|
|
||||||
"bics r2, r2, #0b1100",
|
|
||||||
"bxeq lr",
|
|
||||||
|
|
||||||
// copy halfword and/or byte
|
|
||||||
"lsls r3, r2, #31",
|
|
||||||
"ldrhcs r3, [r1], #2",
|
|
||||||
"strhcs r3, [r0], #2",
|
|
||||||
"ldrbmi r3, [r1], #1",
|
|
||||||
"strbmi r3, [r0], #1",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_f_copy_block:",
|
|
||||||
with_pushed_registers!("{r4-r9}", {
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #32",
|
|
||||||
"ldmge r1!, {r3-r9, r12}",
|
|
||||||
"stmge r0!, {r3-r9, r12}",
|
|
||||||
"bgt 1b",
|
|
||||||
}),
|
|
||||||
"bxeq lr",
|
|
||||||
"b .L_f_copy_post_block",
|
|
||||||
|
|
||||||
".L_f_copy_fixup4:",
|
|
||||||
"cmp r2, #7", // if count <= (fix+word): just byte copy
|
|
||||||
"ble .L_f_copy_max_coalign1",
|
|
||||||
"lsls r3, r0, #31",
|
|
||||||
"submi r2, r2, #1",
|
|
||||||
"ldrbmi r3, [r1], #1",
|
|
||||||
"strbmi r3, [r0], #1",
|
|
||||||
"subcs r2, r2, #2",
|
|
||||||
"ldrhcs r3, [r1], #2",
|
|
||||||
"strhcs r3, [r0], #2",
|
|
||||||
"b .L_f_copy_coalign4_assured",
|
|
||||||
|
|
||||||
".L_f_copy_max_coalign2:",
|
|
||||||
"tst r0, #1",
|
|
||||||
"bne .L_f_copy_fixup2",
|
|
||||||
".L_f_copy_coalign2_assured:",
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #2",
|
|
||||||
"ldrhge r3, [r1], #2",
|
|
||||||
"strhge r3, [r0], #2",
|
|
||||||
"bgt 1b",
|
|
||||||
"bxeq lr",
|
|
||||||
"tst r2, #1",
|
|
||||||
"ldrbne r3, [r1], #1",
|
|
||||||
"strbne r3, [r0], #1",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_f_copy_fixup2:",
|
|
||||||
"cmp r2, #3", // if count <= (fix+halfword): just byte copy
|
|
||||||
"ble .L_f_copy_max_coalign1",
|
|
||||||
"sub r2, r2, #1",
|
|
||||||
"ldrb r3, [r1], #1",
|
|
||||||
"strb r3, [r0], #1",
|
|
||||||
"b .L_f_copy_coalign2_assured",
|
|
||||||
|
|
||||||
"gba_sram_memcpy:",
|
|
||||||
".L_f_copy_max_coalign1:",
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #1",
|
|
||||||
"ldrbge r3, [r1], #1",
|
|
||||||
"strbge r3, [r0], #1",
|
|
||||||
"bgt 1b",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_r_copy_gain_align:",
|
|
||||||
"add r0, r0, r2",
|
|
||||||
"add r1, r1, r2",
|
|
||||||
"eor r3, r0, r1",
|
|
||||||
"lsls r3, r3, #31",
|
|
||||||
"bmi .L_r_copy_max_coalign1",
|
|
||||||
"bcs .L_r_copy_max_coalign2",
|
|
||||||
// else fallthrough
|
|
||||||
|
|
||||||
".L_r_copy_max_coalign4:",
|
|
||||||
"tst r0, #3",
|
|
||||||
"bne .L_r_copy_fixup4",
|
|
||||||
".L_r_copy_coalign4_assured:",
|
|
||||||
"cmp r2, #32",
|
|
||||||
"bge .L_r_copy_block",
|
|
||||||
".L_r_copy_post_block:",
|
|
||||||
// copy 4 words, two at a time
|
|
||||||
"tst r2, #0b10000",
|
|
||||||
"ldmdbne r1!, {r3, r12}",
|
|
||||||
"stmdbne r0!, {r3, r12}",
|
|
||||||
"ldmdbne r1!, {r3, r12}",
|
|
||||||
"stmdbne r0!, {r3, r12}",
|
|
||||||
"bics r2, r2, #0b10000",
|
|
||||||
"bxeq lr",
|
|
||||||
|
|
||||||
// copy 2 and/or 1 words
|
|
||||||
"lsls r3, r2, #29",
|
|
||||||
"ldmdbcs r1!, {r3, r12}",
|
|
||||||
"stmdbcs r0!, {r3, r12}",
|
|
||||||
"ldrmi r3, [r1, #-4]!",
|
|
||||||
"strmi r3, [r0, #-4]!",
|
|
||||||
"bxeq lr",
|
|
||||||
"lsls r2, r2, #31",
|
|
||||||
"ldrhcs r3, [r1, #-2]!",
|
|
||||||
"strhcs r3, [r0, #-2]!",
|
|
||||||
"ldrbmi r3, [r1, #-1]!",
|
|
||||||
"strbmi r3, [r0, #-1]!",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_r_copy_block:",
|
|
||||||
with_pushed_registers!("{r4-r9}", {
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #32",
|
|
||||||
"ldmdbcs r1!, {r3-r9, r12}",
|
|
||||||
"stmdbcs r0!, {r3-r9, r12}",
|
|
||||||
"bgt 1b",
|
|
||||||
}),
|
|
||||||
"bxeq lr",
|
|
||||||
"b .L_r_copy_post_block",
|
|
||||||
|
|
||||||
".L_r_copy_fixup4:",
|
|
||||||
"cmp r2, #7", // if count <= (fix+word): just byte copy
|
|
||||||
"ble .L_r_copy_max_coalign1",
|
|
||||||
"lsls r3, r0, #31",
|
|
||||||
"submi r2, r2, #1",
|
|
||||||
"ldrbmi r3, [r1, #-1]!",
|
|
||||||
"strbmi r3, [r0, #-1]!",
|
|
||||||
"subcs r2, r2, #2",
|
|
||||||
"ldrhcs r3, [r1, #-2]!",
|
|
||||||
"strhcs r3, [r0, #-2]!",
|
|
||||||
"b .L_r_copy_coalign4_assured",
|
|
||||||
|
|
||||||
".L_r_copy_max_coalign2:",
|
|
||||||
"tst r0, #1",
|
|
||||||
"bne .L_r_copy_fixup2",
|
|
||||||
".L_r_copy_coalign2_assured:",
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #2",
|
|
||||||
"ldrhge r3, [r1, #-2]!",
|
|
||||||
"strhge r3, [r0, #-2]!",
|
|
||||||
"bgt 1b",
|
|
||||||
"bxeq lr",
|
|
||||||
"tst r2, #1",
|
|
||||||
"ldrbne r3, [r1, #-1]!",
|
|
||||||
"strbne r3, [r0, #-1]!",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_r_copy_fixup2:",
|
|
||||||
"cmp r2, #3", // if count <= (fix+halfword): just byte copy
|
|
||||||
"ble .L_r_copy_max_coalign1",
|
|
||||||
"sub r2, r2, #1",
|
|
||||||
"ldrb r3, [r1, #-1]!",
|
|
||||||
"strb r3, [r0, #-1]!",
|
|
||||||
"b .L_r_copy_coalign2_assured",
|
|
||||||
|
|
||||||
".L_r_copy_max_coalign1:",
|
|
||||||
"1:",
|
|
||||||
"subs r2, r2, #1",
|
|
||||||
"ldrbge r3, [r1, #-1]!",
|
|
||||||
"strbge r3, [r0, #-1]!",
|
|
||||||
"bgt 1b",
|
|
||||||
"bx lr",
|
|
||||||
}),
|
|
||||||
},
|
|
||||||
options(raw)
|
|
||||||
}
|
|
||||||
|
|
||||||
core::arch::global_asm! {
|
|
||||||
emit_a32_code!{
|
|
||||||
put_code_in_section!(".iwram.aeabi.memory.clear.and.set", {
|
|
||||||
".global __aeabi_memclr8",
|
|
||||||
".global __aeabi_memclr4",
|
|
||||||
".global __aeabi_memclr",
|
|
||||||
".global __aeabi_memset8",
|
|
||||||
".global __aeabi_memset4",
|
|
||||||
".global __aeabi_memset",
|
|
||||||
//
|
|
||||||
"__aeabi_memclr8:",
|
|
||||||
"__aeabi_memclr4:",
|
|
||||||
"mov r2, #0",
|
|
||||||
"mov r3, #0",
|
|
||||||
"b .L_memset_check_for_block_work",
|
|
||||||
"__aeabi_memclr:",
|
|
||||||
"mov r2, #0",
|
|
||||||
"__aeabi_memset8:",
|
|
||||||
"__aeabi_memset4:",
|
|
||||||
"__aeabi_memset:", // r0(dest), r1(count), r2(byte)
|
|
||||||
// duplicate the byte across all of r2 and r3
|
|
||||||
"and r2, r2, #0xFF",
|
|
||||||
"orr r2, r2, r2, lsl #8",
|
|
||||||
"orr r2, r2, r2, lsl #16",
|
|
||||||
"mov r3, r2",
|
|
||||||
// for 'sets' too small to fixup we just byte loop
|
|
||||||
"cmp r1, #3",
|
|
||||||
"ble .L_memset_byte_loop",
|
|
||||||
// carry/sign test on the address, then do fixup
|
|
||||||
"lsls r12, r0, #31",
|
|
||||||
"submi r1, r1, #1",
|
|
||||||
"strbmi r2, [r0], #1",
|
|
||||||
"subcs r1, r1, #2",
|
|
||||||
"strhcs r2, [r0], #2",
|
|
||||||
".L_memset_check_for_block_work:",
|
|
||||||
"cmp r1, #32",
|
|
||||||
"bge .L_memset_block_work",
|
|
||||||
|
|
||||||
".L_memset_post_block_work:",
|
|
||||||
// set 4 words
|
|
||||||
"tst r1, #0b10000",
|
|
||||||
"stmne r0!, {r2, r3}",
|
|
||||||
"stmne r0!, {r2, r3}",
|
|
||||||
// set 2 and/or 1 words
|
|
||||||
"lsls r12, r1, #29",
|
|
||||||
"stmcs r0!, {r2, r3}",
|
|
||||||
"strmi r2, [r0], #4",
|
|
||||||
// set halfword and/or byte
|
|
||||||
"lsls r12, r1, #31",
|
|
||||||
"strhcs r2, [r0], #2",
|
|
||||||
"strbmi r2, [r0], #1",
|
|
||||||
"bx lr",
|
|
||||||
|
|
||||||
".L_memset_block_work:",
|
|
||||||
with_pushed_registers!("{r4-r9}", {
|
|
||||||
"mov r4, r2",
|
|
||||||
"mov r5, r2",
|
|
||||||
"mov r6, r2",
|
|
||||||
"mov r7, r2",
|
|
||||||
"mov r8, r2",
|
|
||||||
"mov r9, r2",
|
|
||||||
"1:",
|
|
||||||
"subs r1, r1, #32",
|
|
||||||
"stmge r0!, {r2-r9}",
|
|
||||||
"bgt 1b",
|
|
||||||
}),
|
|
||||||
"bxeq lr",
|
|
||||||
"b .L_memset_post_block_work",
|
|
||||||
|
|
||||||
".L_memset_byte_loop:",
|
|
||||||
"1:",
|
|
||||||
"subs r1, r1, #1",
|
|
||||||
"strbcs r2, [r0], #1",
|
|
||||||
"bgt 1b",
|
|
||||||
"bx lr",
|
|
||||||
}),
|
|
||||||
},
|
|
||||||
options(raw),
|
|
||||||
}
|
|
||||||
|
|
|
||||||
|
|
@ -96,6 +96,7 @@ pub mod fixed;
|
||||||
pub mod gba_cell;
|
pub mod gba_cell;
|
||||||
pub mod interrupts;
|
pub mod interrupts;
|
||||||
pub mod keys;
|
pub mod keys;
|
||||||
|
pub mod mem_fns;
|
||||||
pub mod mgba;
|
pub mod mgba;
|
||||||
pub mod mmio;
|
pub mod mmio;
|
||||||
pub mod prelude;
|
pub mod prelude;
|
||||||
|
|
|
||||||
659
src/mem_fns.rs
Normal file
659
src/mem_fns.rs
Normal file
|
|
@ -0,0 +1,659 @@
|
||||||
|
//! Module for direct memory operations.
|
||||||
|
//!
|
||||||
|
//! Generally you don't need to call these yourself. Instead, the compiler will
|
||||||
|
//! insert calls to the functions defined here as necessary.
|
||||||
|
|
||||||
|
use core::ffi::c_void;
|
||||||
|
|
||||||
|
/// Byte copy between exclusive regions.
|
||||||
|
///
|
||||||
|
/// * This will *always* copy one byte at a time, making it suitable for use
|
||||||
|
/// with SRAM memory.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memcpy1"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memcpy1(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"1:",
|
||||||
|
"subs {count}, {count}, #1",
|
||||||
|
"ldrbge {temp}, [{src}], #1",
|
||||||
|
"strbge {temp}, [{dest}], #1",
|
||||||
|
"bgt 1b",
|
||||||
|
temp = out(reg) _,
|
||||||
|
count = inout(reg) byte_count => _,
|
||||||
|
src = inout(reg) src => _,
|
||||||
|
dest = inout(reg) dest => _,
|
||||||
|
options(nostack)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Halfword copy between exclusive regions.
|
||||||
|
///
|
||||||
|
/// * **Safety:** The pointers must start aligned to 2.
|
||||||
|
/// * If the `byte_count` is odd then a single byte copy will happen at the end.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memcpy2"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memcpy2(
|
||||||
|
mut dest: *mut u16, mut src: *const u16, mut byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"1:",
|
||||||
|
"subs {count}, {count}, #2",
|
||||||
|
"ldrhge {temp}, [{src}], #2",
|
||||||
|
"strhge {temp}, [{dest}], #2",
|
||||||
|
"bgt 1b",
|
||||||
|
temp = out(reg) _,
|
||||||
|
count = inout(reg) byte_count,
|
||||||
|
src = inout(reg) src,
|
||||||
|
dest = inout(reg) dest,
|
||||||
|
options(nostack)
|
||||||
|
}
|
||||||
|
if byte_count != 0 {
|
||||||
|
let dest = dest.cast::<u8>();
|
||||||
|
let src = src.cast::<u8>();
|
||||||
|
dest.write_volatile(src.read_volatile());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Word copy between exclusive regions.
|
||||||
|
///
|
||||||
|
/// * **Safety:** The pointers must start aligned to 4.
|
||||||
|
/// * If `byte_count` is not a multiple of 4 then a halfword and/or byte copy
|
||||||
|
/// will happen at the end.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memcpy4"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memcpy4(
|
||||||
|
dest: *mut u32, src: *const u32, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::when!( "r2" >=u "#32" [label_id=2] {
|
||||||
|
bracer::with_pushed_registers!("{{r4-r9}}", {
|
||||||
|
"1:",
|
||||||
|
"subs r2, r2, #32",
|
||||||
|
"ldmge r1!, {{r3-r9, r12}}",
|
||||||
|
"stmge r0!, {{r3-r9, r12}}",
|
||||||
|
"bgt 1b",
|
||||||
|
}),
|
||||||
|
"bxeq lr",
|
||||||
|
}),
|
||||||
|
|
||||||
|
// copy 4 words, two at a time
|
||||||
|
"tst r2, #0b10000",
|
||||||
|
"ldmne r1!, {{r3, r12}}",
|
||||||
|
"stmne r0!, {{r3, r12}}",
|
||||||
|
"ldmne r1!, {{r3, r12}}",
|
||||||
|
"stmne r0!, {{r3, r12}}",
|
||||||
|
"bics r2, r2, #0b10000",
|
||||||
|
"bxeq lr",
|
||||||
|
|
||||||
|
// copy 2 and/or 1 words
|
||||||
|
"lsls r3, r2, #29",
|
||||||
|
"ldmcs r1!, {{r3, r12}}",
|
||||||
|
"stmcs r0!, {{r3, r12}}",
|
||||||
|
"ldrmi r3, [r1], #4",
|
||||||
|
"strmi r3, [r0], #4",
|
||||||
|
"bics r2, r2, #0b1100",
|
||||||
|
"bxeq lr",
|
||||||
|
|
||||||
|
// copy halfword and/or byte
|
||||||
|
"lsls r3, r2, #31",
|
||||||
|
"ldrhcs r3, [r1], #2",
|
||||||
|
"strhcs r3, [r0], #2",
|
||||||
|
"ldrbmi r3, [r1], #1",
|
||||||
|
"strbmi r3, [r0], #1",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Just call [`__aeabi_memcpy4`] instead.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memcpy8"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memcpy8(
|
||||||
|
dest: *mut u32, src: *const u32, byte_count: usize,
|
||||||
|
) {
|
||||||
|
__aeabi_memcpy4(dest, src, byte_count);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Arbitrary width copy between exclusive regions.
|
||||||
|
///
|
||||||
|
/// * The pointers do not have a minimum alignment.
|
||||||
|
/// * The function will automatically use the best type of copy possible, based
|
||||||
|
/// on the pointers given.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memcpy"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memcpy(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"cmp r2, #7", // if count <= (fix+word): just byte copy
|
||||||
|
"ble {__aeabi_memcpy1}",
|
||||||
|
|
||||||
|
// check max coalign
|
||||||
|
"eor r3, r0, r1",
|
||||||
|
"lsls r3, r3, #31",
|
||||||
|
"bmi {__aeabi_memcpy1}",
|
||||||
|
"bcs 2f",
|
||||||
|
|
||||||
|
// max coalign4, possible fixup and jump
|
||||||
|
"lsls r3, r0, #31",
|
||||||
|
"submi r2, r2, #1",
|
||||||
|
"ldrbmi r3, [r1], #1",
|
||||||
|
"strbmi r3, [r0], #1",
|
||||||
|
"subcs r2, r2, #2",
|
||||||
|
"ldrhcs r3, [r1], #2",
|
||||||
|
"strhcs r3, [r0], #2",
|
||||||
|
"b {__aeabi_memcpy4}",
|
||||||
|
|
||||||
|
// max coalign2, possible fixup and jump
|
||||||
|
"2:",
|
||||||
|
"lsls r3, r0, #31",
|
||||||
|
"submi r2, r2, #1",
|
||||||
|
"ldrbmi r3, [r1], #1",
|
||||||
|
"strbmi r3, [r0], #1",
|
||||||
|
"b {__aeabi_memcpy2}",
|
||||||
|
|
||||||
|
//
|
||||||
|
__aeabi_memcpy4 = sym __aeabi_memcpy4,
|
||||||
|
__aeabi_memcpy2 = sym __aeabi_memcpy2,
|
||||||
|
__aeabi_memcpy1 = sym __aeabi_memcpy1,
|
||||||
|
options(noreturn)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between exclusive regions, prefer [`__aeabi_memcpy`] if possible.
|
||||||
|
///
|
||||||
|
/// This is the libc version of a memory copy. It's required to return the
|
||||||
|
/// `dest` pointer at the end of the call, which makes it need an extra
|
||||||
|
/// push/pop compared to a direct call to `__aeabi_memcpy`.
|
||||||
|
///
|
||||||
|
/// * **Returns:** The `dest` pointer.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.memcpy"]
|
||||||
|
pub unsafe extern "C" fn memcpy(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) -> *mut u8 {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::with_pushed_registers!("{{r0, lr}}", {
|
||||||
|
"bl {__aeabi_memcpy}",
|
||||||
|
}),
|
||||||
|
"bx lr",
|
||||||
|
__aeabi_memcpy = sym __aeabi_memcpy,
|
||||||
|
options(noreturn)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// MOVE
|
||||||
|
|
||||||
|
// used by `__aeabi_memmove` in some cases
|
||||||
|
#[inline]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.reverse_copy_u8"]
|
||||||
|
unsafe extern "C" fn reverse_copy_u8(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"1:",
|
||||||
|
"subs {count}, {count}, #1",
|
||||||
|
"ldrbge {temp}, [{src}, #-1]!",
|
||||||
|
"strbge {temp}, [{dest}, #-1]!",
|
||||||
|
"bgt 1b",
|
||||||
|
temp = out(reg) _,
|
||||||
|
count = inout(reg) byte_count => _,
|
||||||
|
src = inout(reg) src => _,
|
||||||
|
dest = inout(reg) dest => _,
|
||||||
|
options(nostack)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// used by `__aeabi_memmove` in some cases
|
||||||
|
#[inline]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.reverse_copy_u16"]
|
||||||
|
unsafe extern "C" fn reverse_copy_u16(
|
||||||
|
mut dest: *mut u16, mut src: *const u16, mut byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"1:",
|
||||||
|
"subs {count}, {count}, #2",
|
||||||
|
"ldrhge {temp}, [{src}, #-2]!",
|
||||||
|
"strhge {temp}, [{dest}, #-2]!",
|
||||||
|
"bgt 1b",
|
||||||
|
temp = out(reg) _,
|
||||||
|
count = inout(reg) byte_count,
|
||||||
|
src = inout(reg) src,
|
||||||
|
dest = inout(reg) dest,
|
||||||
|
options(nostack)
|
||||||
|
}
|
||||||
|
if byte_count != 0 {
|
||||||
|
let dest = dest.cast::<u8>().sub(1);
|
||||||
|
let src = src.cast::<u8>().sub(1);
|
||||||
|
dest.write_volatile(src.read_volatile());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// used by `__aeabi_memmove` in some cases
|
||||||
|
#[naked]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.reverse_copy_u32"]
|
||||||
|
unsafe extern "C" fn reverse_copy_u32(
|
||||||
|
dest: *mut u32, src: *const u32, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::when!( "r2" >=u "#32" [label_id=2] {
|
||||||
|
bracer::with_pushed_registers!("{{r4-r9}}", {
|
||||||
|
"1:",
|
||||||
|
"subs r2, r2, #32",
|
||||||
|
"ldmdbcs r1!, {{r3-r9, r12}}",
|
||||||
|
"stmdbcs r0!, {{r3-r9, r12}}",
|
||||||
|
"bgt 1b",
|
||||||
|
}),
|
||||||
|
"bxeq lr",
|
||||||
|
}),
|
||||||
|
|
||||||
|
// copy 4 words, two at a time
|
||||||
|
"tst r2, #0b10000",
|
||||||
|
"ldmdbne r1!, {{r3, r12}}",
|
||||||
|
"stmdbne r0!, {{r3, r12}}",
|
||||||
|
"ldmdbne r1!, {{r3, r12}}",
|
||||||
|
"stmdbne r0!, {{r3, r12}}",
|
||||||
|
"bics r2, r2, #0b10000",
|
||||||
|
"bxeq lr",
|
||||||
|
|
||||||
|
// copy 2 and/or 1 words
|
||||||
|
"lsls r3, r2, #29",
|
||||||
|
"ldmdbcs r1!, {{r3, r12}}",
|
||||||
|
"stmdbcs r0!, {{r3, r12}}",
|
||||||
|
"ldrmi r3, [r1, #-4]!",
|
||||||
|
"strmi r3, [r0, #-4]!",
|
||||||
|
"bxeq lr",
|
||||||
|
|
||||||
|
// copy halfword and/or byte
|
||||||
|
"lsls r2, r2, #31",
|
||||||
|
"ldrhcs r3, [r1, #-2]!",
|
||||||
|
"strhcs r3, [r0, #-2]!",
|
||||||
|
"ldrbmi r3, [r1, #-1]!",
|
||||||
|
"strbmi r3, [r0, #-1]!",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memmove`] if possible.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memmove4"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memmove4(
|
||||||
|
dest: *mut u32, src: *const u32, byte_count: usize,
|
||||||
|
) {
|
||||||
|
__aeabi_memmove(dest.cast(), src.cast(), byte_count)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memmove`] if possible.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memmove8"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memmove8(
|
||||||
|
dest: *mut u32, src: *const u32, byte_count: usize,
|
||||||
|
) {
|
||||||
|
__aeabi_memmove(dest.cast(), src.cast(), byte_count)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions.
|
||||||
|
///
|
||||||
|
/// * The pointers do not have a minimum alignment. The function will
|
||||||
|
/// automatically detect the best type of copy to perform.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memmove"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memmove(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
"cmp r2, #7", // if count <= (fix+word): just byte copy
|
||||||
|
"ble {__aeabi_memcpy1}",
|
||||||
|
bracer::when!("r0" >=u "r1" [label_id=1] {
|
||||||
|
// when d > s we need to reverse-direction copy
|
||||||
|
"add r0, r0, r2",
|
||||||
|
"add r1, r1, r2",
|
||||||
|
"eor r3, r0, r1",
|
||||||
|
"lsls r3, r3, #31",
|
||||||
|
"bmi {reverse_copy_u8}",
|
||||||
|
"bcs 2f",
|
||||||
|
|
||||||
|
// max coalign4, possible fixup and jump
|
||||||
|
"lsls r3, r0, #31",
|
||||||
|
"submi r2, r2, #1",
|
||||||
|
"ldrbmi r3, [r1, #-1]!",
|
||||||
|
"strbmi r3, [r0, #-1]!",
|
||||||
|
"subcs r2, r2, #2",
|
||||||
|
"ldrhcs r3, [r1, #-2]!",
|
||||||
|
"strhcs r3, [r0, #-2]!",
|
||||||
|
"b {reverse_copy_u32}",
|
||||||
|
|
||||||
|
// max coalign2, possible fixup and jump
|
||||||
|
"2:",
|
||||||
|
"tst r0, #1",
|
||||||
|
"sub r2, r2, #1",
|
||||||
|
"ldrb r3, [r1, #-1]!",
|
||||||
|
"strb r3, [r0, #-1]!",
|
||||||
|
"b {reverse_copy_u16}",
|
||||||
|
}),
|
||||||
|
"b {__aeabi_memcpy}",
|
||||||
|
__aeabi_memcpy = sym __aeabi_memcpy,
|
||||||
|
__aeabi_memcpy1 = sym __aeabi_memcpy1,
|
||||||
|
reverse_copy_u8 = sym reverse_copy_u8,
|
||||||
|
reverse_copy_u16 = sym reverse_copy_u16,
|
||||||
|
reverse_copy_u32 = sym reverse_copy_u32,
|
||||||
|
options(noreturn),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memmove`] if possible.
|
||||||
|
///
|
||||||
|
/// This is the libc version of a memory move. It's required to return the
|
||||||
|
/// `dest` pointer at the end of the call, which makes it need an extra
|
||||||
|
/// push/pop compared to a direct call to `__aeabi_memmove`.
|
||||||
|
///
|
||||||
|
/// * **Returns:** The `dest` pointer.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.memmove"]
|
||||||
|
pub unsafe extern "C" fn memmove(
|
||||||
|
dest: *mut u8, src: *const u8, byte_count: usize,
|
||||||
|
) -> *mut u8 {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::with_pushed_registers!("{{r0, lr}}", {
|
||||||
|
"bl {__aeabi_memmove}",
|
||||||
|
}),
|
||||||
|
"bx lr",
|
||||||
|
__aeabi_memmove = sym __aeabi_memmove,
|
||||||
|
options(noreturn)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// SET
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memset`] if possible.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memset4"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memset4(
|
||||||
|
dest: *mut u32, byte_count: usize, byte: i32,
|
||||||
|
) {
|
||||||
|
__aeabi_memset(dest.cast(), byte_count, byte)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memset`] if possible.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memset8"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memset8(
|
||||||
|
dest: *mut u32, byte_count: usize, byte: i32,
|
||||||
|
) {
|
||||||
|
__aeabi_memset(dest.cast(), byte_count, byte)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Sets all bytes in the region to the `byte` given.
|
||||||
|
///
|
||||||
|
/// Because of historical reasons, the byte is passed in as an `i32`, but only
|
||||||
|
/// the lowest 8 bits are used.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memset"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memset(
|
||||||
|
dest: *mut u8, byte_count: usize, byte: i32,
|
||||||
|
) {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::when!("r1" >=u "#8" [label_id=7] {
|
||||||
|
// duplicate the byte across all of r2 and r3
|
||||||
|
"and r2, r2, #0xFF",
|
||||||
|
"orr r2, r2, r2, lsl #8",
|
||||||
|
"orr r2, r2, r2, lsl #16",
|
||||||
|
"mov r3, r2",
|
||||||
|
|
||||||
|
// carry/sign test on the address, then do fixup
|
||||||
|
"lsls r12, r0, #31",
|
||||||
|
"submi r1, r1, #1",
|
||||||
|
"strbmi r2, [r0], #1",
|
||||||
|
"subcs r1, r1, #2",
|
||||||
|
"strhcs r2, [r0], #2",
|
||||||
|
|
||||||
|
bracer::when!("r1" >=u "#32" [label_id=8] {
|
||||||
|
bracer::with_pushed_registers!("{{r4-r9}}", {
|
||||||
|
"mov r4, r2",
|
||||||
|
"mov r5, r2",
|
||||||
|
"mov r6, r2",
|
||||||
|
"mov r7, r2",
|
||||||
|
"mov r8, r2",
|
||||||
|
"mov r9, r2",
|
||||||
|
"1:",
|
||||||
|
"subs r1, r1, #32",
|
||||||
|
"stmge r0!, {{r2-r9}}",
|
||||||
|
"bgt 1b",
|
||||||
|
}),
|
||||||
|
"bxeq lr",
|
||||||
|
}),
|
||||||
|
|
||||||
|
// set 4 words
|
||||||
|
"tst r1, #0b10000",
|
||||||
|
"stmne r0!, {{r2, r3}}",
|
||||||
|
"stmne r0!, {{r2, r3}}",
|
||||||
|
|
||||||
|
// set 2 and/or 1 words
|
||||||
|
"lsls r12, r1, #29",
|
||||||
|
"stmcs r0!, {{r2, r3}}",
|
||||||
|
"strmi r2, [r0], #4",
|
||||||
|
|
||||||
|
// set halfword and/or byte
|
||||||
|
"lsls r12, r1, #31",
|
||||||
|
"strhcs r2, [r0], #2",
|
||||||
|
"strbmi r2, [r0], #1",
|
||||||
|
"bx lr",
|
||||||
|
}),
|
||||||
|
// byte loop
|
||||||
|
"9:",
|
||||||
|
"subs r1, r1, #1",
|
||||||
|
"strbcs r2, [r0], #1",
|
||||||
|
"bgt 9b",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Copy between non-exclusive regions, prefer [`__aeabi_memset`] if possible.
|
||||||
|
///
|
||||||
|
/// This is the libc version of a memory set. It's required to return the
|
||||||
|
/// `dest` pointer at the end of the call, which makes it need an extra
|
||||||
|
/// push/pop compared to a direct call to `__aeabi_memset`.
|
||||||
|
///
|
||||||
|
/// * **Returns:** The `dest` pointer.
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.memset"]
|
||||||
|
pub unsafe extern "C" fn memset(
|
||||||
|
dest: *mut u8, byte: i32, byte_count: usize,
|
||||||
|
) -> *mut u8 {
|
||||||
|
core::arch::asm! {
|
||||||
|
bracer::with_pushed_registers!("{{r0, lr}}", {
|
||||||
|
"bl {__aeabi_memset}",
|
||||||
|
}),
|
||||||
|
"bx lr",
|
||||||
|
__aeabi_memset = sym __aeabi_memset,
|
||||||
|
options(noreturn)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// CLEAR
|
||||||
|
|
||||||
|
/// Just call [`__aeabi_memset`] with 0 as the `byte` instead.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memclr4"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memclr4(dest: *mut u32, byte_count: usize) {
|
||||||
|
__aeabi_memset(dest.cast(), byte_count, 0)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Just call [`__aeabi_memset`] with 0 as the `byte` instead.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memclr8"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memclr8(dest: *mut u32, byte_count: usize) {
|
||||||
|
__aeabi_memset(dest.cast(), byte_count, 0)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Just call [`__aeabi_memset`] with 0 as the `byte` instead.
|
||||||
|
///
|
||||||
|
/// This function is provided only for API completeness, because in some cases
|
||||||
|
/// the compiler might automatically generate a call to this function.
|
||||||
|
#[inline]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.__aeabi_memclr"]
|
||||||
|
pub unsafe extern "C" fn __aeabi_memclr(dest: *mut u8, byte_count: usize) {
|
||||||
|
__aeabi_memset(dest, byte_count, 0)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Reads 4 bytes, starting at the address given.
|
||||||
|
///
|
||||||
|
/// See [__aeabi_uread4]
|
||||||
|
///
|
||||||
|
/// [__aeabi_uread4]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.aeabi.uread4"]
|
||||||
|
unsafe extern "C" fn __aeabi_uread4(address: *const c_void) -> u32 {
|
||||||
|
core::arch::asm!(
|
||||||
|
"ldrb r2, [r0]",
|
||||||
|
"ldrb r3, [r0, #1]",
|
||||||
|
"orr r2, r2, r3, lsl #8",
|
||||||
|
"ldrb r3, [r0, #2]",
|
||||||
|
"orr r2, r2, r3, lsl #16",
|
||||||
|
"ldrb r3, [r0, #3]",
|
||||||
|
"orr r2, r2, r3, lsl #24",
|
||||||
|
"mov r0, r2",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn),
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Writes 4 bytes, starting at the address given.
|
||||||
|
///
|
||||||
|
/// See [__aeabi_uwrite4]
|
||||||
|
///
|
||||||
|
/// [__aeabi_uwrite4]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.aeabi.uwrite4"]
|
||||||
|
unsafe extern "C" fn __aeabi_uwrite4(value: u32, address: *mut c_void) {
|
||||||
|
core::arch::asm!(
|
||||||
|
"strb r0, [r1]",
|
||||||
|
"lsr r2, r0, #8",
|
||||||
|
"strb r2, [r1, #1]",
|
||||||
|
"lsr r2, r2, #8",
|
||||||
|
"strb r2, [r1, #2]",
|
||||||
|
"lsr r2, r2, #8",
|
||||||
|
"strb r2, [r1, #3]",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn),
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Reads 8 bytes, starting at the address given.
|
||||||
|
///
|
||||||
|
/// See [__aeabi_uread8]
|
||||||
|
///
|
||||||
|
/// [__aeabi_uread8]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.aeabi.uread8"]
|
||||||
|
unsafe extern "C" fn __aeabi_uread8(address: *const c_void) -> u64 {
|
||||||
|
core::arch::asm!(
|
||||||
|
"ldrb r1, [r0, #4]",
|
||||||
|
"ldrb r2, [r0, #5]",
|
||||||
|
"orr r1, r1, r2, lsl #8",
|
||||||
|
"ldrb r2, [r0, #6]",
|
||||||
|
"orr r1, r1, r2, lsl #16",
|
||||||
|
"ldrb r2, [r0, #7]",
|
||||||
|
"orr r1, r1, r2, lsl #24",
|
||||||
|
"b __aeabi_uread4",
|
||||||
|
options(noreturn),
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Writes 8 bytes, starting at the address given.
|
||||||
|
///
|
||||||
|
/// See [__aeabi_uwrite8]
|
||||||
|
///
|
||||||
|
/// [__aeabi_uwrite8]: https://github.com/ARM-software/abi-aa/blob/main/rtabi32/rtabi32.rst#unaligned-memory-access
|
||||||
|
#[naked]
|
||||||
|
#[no_mangle]
|
||||||
|
#[instruction_set(arm::a32)]
|
||||||
|
#[link_section = ".iwram.aeabi.uwrite8"]
|
||||||
|
unsafe extern "C" fn __aeabi_uwrite8(value: u64, address: *mut c_void) {
|
||||||
|
core::arch::asm!(
|
||||||
|
"strb r0, [r2]",
|
||||||
|
"lsr r3, r0, #8",
|
||||||
|
"strb r3, [r2, #1]",
|
||||||
|
"lsr r3, r3, #8",
|
||||||
|
"strb r3, [r2, #2]",
|
||||||
|
"lsr r3, r3, #8",
|
||||||
|
"strb r3, [r2, #3]",
|
||||||
|
"strb r1, [r2, #4]",
|
||||||
|
"lsr r3, r1, #8",
|
||||||
|
"strb r3, [r2, #5]",
|
||||||
|
"lsr r3, r3, #8",
|
||||||
|
"strb r3, [r2, #6]",
|
||||||
|
"lsr r3, r3, #8",
|
||||||
|
"strb r3, [r2, #7]",
|
||||||
|
"bx lr",
|
||||||
|
options(noreturn),
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
@ -277,7 +277,7 @@ impl TextScreenblockAddress {
|
||||||
|
|
||||||
#[inline]
|
#[inline]
|
||||||
pub fn write_word_array(self, words: &[u32; Self::WORD_COUNT]) {
|
pub fn write_word_array(self, words: &[u32; Self::WORD_COUNT]) {
|
||||||
use crate::prelude::__aeabi_memcpy4;
|
use crate::mem_fns::__aeabi_memcpy4;
|
||||||
let dest: *mut u32 = self.block.as_ptr() as *mut u32;
|
let dest: *mut u32 = self.block.as_ptr() as *mut u32;
|
||||||
let src: *const u32 = words.as_ptr();
|
let src: *const u32 = words.as_ptr();
|
||||||
let byte_count = size_of::<[u32; Self::WORD_COUNT]>();
|
let byte_count = size_of::<[u32; Self::WORD_COUNT]>();
|
||||||
|
|
@ -347,7 +347,7 @@ macro_rules! make_affine_screenblock_address_type {
|
||||||
|
|
||||||
#[inline]
|
#[inline]
|
||||||
pub fn write_word_array(self, words: &[u32; Self::WORD_COUNT]) {
|
pub fn write_word_array(self, words: &[u32; Self::WORD_COUNT]) {
|
||||||
use crate::prelude::__aeabi_memcpy4;
|
use crate::mem_fns::__aeabi_memcpy4;
|
||||||
let dest: *mut u32 = self.block.as_ptr() as *mut u32;
|
let dest: *mut u32 = self.block.as_ptr() as *mut u32;
|
||||||
let src: *const u32 = words.as_ptr();
|
let src: *const u32 = words.as_ptr();
|
||||||
let byte_count = size_of::<[u32; Self::WORD_COUNT]>();
|
let byte_count = size_of::<[u32; Self::WORD_COUNT]>();
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue