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authoriximeow <me@iximeow.net>2024-06-19 10:46:49 -0700
committeriximeow <me@iximeow.net>2024-06-19 10:46:49 -0700
commit55548603b88ccf0babd081bd636c73ca164da919 (patch)
tree7594d2be062105e62c3af284d5f052aaa57f78bb /src/long_mode/display.rs
parent49e910b50066161fcf581c4aec775655f85cffe3 (diff)
hoist set_len calls to have fewer live values
Diffstat (limited to 'src/long_mode/display.rs')
-rw-r--r--src/long_mode/display.rs36
1 files changed, 24 insertions, 12 deletions
diff --git a/src/long_mode/display.rs b/src/long_mode/display.rs
index a60b2fd..0188361 100644
--- a/src/long_mode/display.rs
+++ b/src/long_mode/display.rs
@@ -555,6 +555,10 @@ impl DisplaySink for alloc::string::String {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"6:",
"cmp {rem:e}, 16",
@@ -598,8 +602,6 @@ impl DisplaySink for alloc::string::String {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {
@@ -633,6 +635,10 @@ impl DisplaySink for alloc::string::String {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"7:",
"cmp {rem:e}, 8",
@@ -667,8 +673,6 @@ impl DisplaySink for alloc::string::String {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {
@@ -702,6 +706,10 @@ impl DisplaySink for alloc::string::String {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"8:",
"cmp {rem:e}, 4",
@@ -729,8 +737,6 @@ impl DisplaySink for alloc::string::String {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {
@@ -926,6 +932,10 @@ impl DisplaySink for BigEnoughString {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"6:",
"cmp {rem:e}, 16",
@@ -969,8 +979,6 @@ impl DisplaySink for BigEnoughString {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {
@@ -1002,6 +1010,10 @@ impl DisplaySink for BigEnoughString {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"7:",
"cmp {rem:e}, 8",
@@ -1036,8 +1048,6 @@ impl DisplaySink for BigEnoughString {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {
@@ -1069,6 +1079,10 @@ impl DisplaySink for BigEnoughString {
let mut rem = new_bytes.len() as isize;
+ // set_len early because there is no way to avoid the following asm!() writing that
+ // same number of bytes into buf
+ buf.set_len(buf.len() + new_bytes.len());
+
core::arch::asm!(
"8:",
"cmp {rem:e}, 4",
@@ -1096,8 +1110,6 @@ impl DisplaySink for BigEnoughString {
buf = out(reg) _,
options(nostack),
);
-
- buf.set_len(buf.len() + new_bytes.len());
}
/*
for i in 0..new_bytes.len() {