From 3b4a1cd9dd5cec808759efb4dbea27bbefa477bf Mon Sep 17 00:00:00 2001
From: "henthe-5@student.ltu.se" <henthe-5@student.ltu.se>
Date: Tue, 19 Feb 2019 16:22:01 +0100
Subject: [PATCH] bare1_7
---
examples/bare1.rs | 41 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/examples/bare1.rs b/examples/bare1.rs
index 238dfe4..d0b9081 100644
--- a/examples/bare1.rs
+++ b/examples/bare1.rs
@@ -16,6 +16,8 @@ use cortex_m_rt::entry;
use cortex_m::{iprintln, Peripherals};
use cortex_m_semihosting::hprintln;
+use core::num::Wrapping;
+
#[entry]
#[inline(never)]
fn main() -> ! {
@@ -25,14 +27,15 @@ fn main() -> ! {
//let mut p = Peripherals::take().unwrap();
//let stim = &mut p.ITM.stim[0];
- let mut _x = 0;
+ let mut _x = Wrapping(0u32);
+ let one = Wrapping(1u32);
loop {
- _x += 1;
+ _x += one;
cortex_m::asm::nop();
//iprintln!(stim, "{}",_x);
//hprintln!("{}", _x).unwrap();
cortex_m::asm::bkpt();
- _x -= 1;
+ _x -= one;
}
}
@@ -283,11 +286,39 @@ fn main() -> ! {
//
// What is now the disassembly of the code in dev mode?
//
-// ** your answer here **
+// **
+// Dump of assembler code for function main:
+// 0x080004e4 <+0>: sub sp, #8
+// 0x080004e6 <+2>: movs r0, #0
+// 0x080004e8 <+4>: str r0, [sp, #0]
+// 0x080004ea <+6>: movs r0, #1
+// 0x080004ec <+8>: str r0, [sp, #4]
+// 0x080004ee <+10>: b.n 0x80004f0 <main+12>
+// 0x080004f0 <+12>: ldr r1, [sp, #4]
+// 0x080004f2 <+14>: mov r0, sp
+// 0x080004f4 <+16>: bl 0x8000490 <core::num::wrapping::_$LT$impl$u20$core..ops..arith..AddAssign$u20$for$u20$core..num..Wrapping$LT$u32$GT$$GT$::add_assign::hbb56dbef6bcfa964>
+// 0x080004f8 <+20>: b.n 0x80004fa <main+22>
+// 0x080004fa <+22>: bl 0x80004e0 <cortex_m::asm::nop::h0ac7b7a3f33f2667>
+// 0x080004fe <+26>: b.n 0x8000500 <main+28>
+// => 0x08000500 <+28>: bkpt 0x0000
+// 0x08000502 <+30>: b.n 0x8000504 <main+32>
+// 0x08000504 <+32>: ldr r1, [sp, #4]
+// 0x08000506 <+34>: mov r0, sp
+// 0x08000508 <+36>: bl 0x80004b8 <core::num::wrapping::_$LT$impl$u20$core..ops..arith..SubAssign$u20$for$u20$core..num..Wrapping$LT$u32$GT$$GT$::sub_assign::hcf06b8f89372a809>
+// 0x0800050c <+40>: b.n 0x800050e <main+42>
+// 0x0800050e <+42>: b.n 0x80004f0 <main+12>
+// End of assembler dump.
+// **
//
// What is now the disassembly of the code in release mode?
//
-// ** your answer here **
+// **
+// Dump of assembler code for function main:
+// 0x08000400 <+0>: nop
+// => 0x08000402 <+2>: bkpt 0x0000
+// 0x08000404 <+4>: b.n 0x8000400 <main>
+// End of assembler dump.
+// **
//
// commit your answers (bare1_7)
//
--
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