bare2_2

examples/bare2.rs

@@ -98,6 +98,72 @@ fn main() -> ! {
 //    Inspect the generated binaries, and try stepping through the code
 //    for both debug and release binaries. How do they differ?
 //
-//    ** your answer here **
+//    ** Biggest difference in wait loop 
+
+//     -- Debug -- 
+    
+// disassemble
+// {"token":118,"outOfBandRecord":[],"resultRecords":{"resultClass":"done","results":[]}}
+// Dump of assembler code for function bare2::wait::hfe7ce9f60a404aeb:
+//    0x08000746 <+0>:	push	{r7, lr}
+//    0x08000748 <+2>:	sub	sp, #56	; 0x38
+//    0x0800074a <+4>:	mov	r1, r0
+//    0x0800074c <+6>:	str	r0, [sp, #16]
+//    0x0800074e <+8>:	ldr	r0, [sp, #16]
+//    0x08000750 <+10>:	movs	r2, #0
+//    0x08000752 <+12>:	str	r2, [sp, #24]
+//    0x08000754 <+14>:	str	r0, [sp, #28]
+//    0x08000756 <+16>:	ldr	r0, [sp, #24]
+//    0x08000758 <+18>:	ldr	r2, [sp, #28]
+//    0x0800075a <+20>:	str	r1, [sp, #12]
+//    0x0800075c <+22>:	mov	r1, r2
+//    0x0800075e <+24>:	bl	0x8000a9a <_$LT$I$u20$as$u20$core..iter..traits..IntoIterator$GT$::into_iter::h5a903f40a945694e>
+//    0x08000762 <+28>:	str	r0, [sp, #8]
+//    0x08000764 <+30>:	str	r1, [sp, #4]
+//    0x08000766 <+32>:	b.n	0x8000768 <bare2::wait::hfe7ce9f60a404aeb+34>
+//    0x08000768 <+34>:	ldr	r0, [sp, #8]
+//    0x0800076a <+36>:	str	r0, [sp, #32]
+//    0x0800076c <+38>:	ldr	r1, [sp, #4]
+//    0x0800076e <+40>:	str	r1, [sp, #36]	; 0x24
+//    0x08000770 <+42>:	b.n	0x8000772 <bare2::wait::hfe7ce9f60a404aeb+44>
+//    0x08000772 <+44>:	add	r0, sp, #32
+//    0x08000774 <+46>:	bl	0x8000a00 <core::iter::range::_$LT$impl$u20$core..iter..iterator..Iterator$u20$for$u20$core..ops..range..Range$LT$A$GT$$GT$::next::h8a120a1de333cffb>
+// => 0x08000778 <+50>:	str	r1, [sp, #48]	; 0x30
+//    0x0800077a <+52>:	str	r0, [sp, #44]	; 0x2c
+//    0x0800077c <+54>:	b.n	0x800077e <bare2::wait::hfe7ce9f60a404aeb+56>
+//    0x0800077e <+56>:	ldr	r0, [sp, #44]	; 0x2c
+//    0x08000780 <+58>:	cmp	r0, #0
+//    0x08000782 <+60>:	str	r0, [sp, #0]
+//    0x08000784 <+62>:	beq.n	0x8000790 <bare2::wait::hfe7ce9f60a404aeb+74>
+//    0x08000786 <+64>:	b.n	0x8000788 <bare2::wait::hfe7ce9f60a404aeb+66>
+//    0x08000788 <+66>:	ldr	r0, [sp, #0]
+//    0x0800078a <+68>:	cmp	r0, #1
+//    0x0800078c <+70>:	beq.n	0x8000796 <bare2::wait::hfe7ce9f60a404aeb+80>
+//    0x0800078e <+72>:	b.n	0x8000794 <bare2::wait::hfe7ce9f60a404aeb+78>
+//    0x08000790 <+74>:	add	sp, #56	; 0x38
+//    0x08000792 <+76>:	pop	{r7, pc}
+//    0x08000794 <+78>:	udf	#254	; 0xfe
+//    0x08000796 <+80>:	ldr	r0, [sp, #48]	; 0x30
+//    0x08000798 <+82>:	str	r0, [sp, #52]	; 0x34
+//    0x0800079a <+84>:	ldr	r0, [sp, #52]	; 0x34
+//    0x0800079c <+86>:	str	r0, [sp, #40]	; 0x28
+//    0x0800079e <+88>:	bl	0x8000af6 <cortex_m::asm::nop::he6ee95faef743e38>
+//    0x080007a2 <+92>:	b.n	0x80007a4 <bare2::wait::hfe7ce9f60a404aeb+94>
+//    0x080007a4 <+94>:	b.n	0x8000772 <bare2::wait::hfe7ce9f60a404aeb+44>
+// End of assembler dump.
+//
+// -- Release --
+// disassemble
+// {"token":172,"outOfBandRecord":[],"resultRecords":{"resultClass":"done","results":[]}}
+// Dump of assembler code for function bare2::wait::h0be3841658d4de56:
+//    0x0800065c <+0>:	movw	r0, #16960	; 0x4240
+//    0x08000660 <+4>:	movt	r0, #15
+//    0x08000664 <+8>:	subs	r0, #1
+//    0x08000666 <+10>:	nop
+//    0x08000668 <+12>:	bne.n	0x8000664 <bare2::wait::h0be3841658d4de56+8>
+// => 0x0800066a <+14>:	bx	lr
+// End of assembler dump.
+//
+//     **
 //
 //    commit your answers (bare2_2)