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WIP: implement more instructions in unit::alu_branch #14

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programmerjake wants to merge 8 commits from programmerjake/cpu:more-alu-branch into master
pull from: programmerjake/cpu:more-alu-branch
merge into: libre-chip:master
Conversation 0 Commits 8 Files changed 6 +5 -7
2 changed files with 5 additions and 7 deletions
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Showing only changes of commit 67abfa2f5d - Show all commits

4
crates/cpu/src/unit/alu_branch.rs
View file

@ -114,7 +114,7 @@ fn add_sub<C: PhantomConstCpuConfig, SrcCount: KnownSize>(
let x86_cf = wire();
#[hdl]
let x86_af = wire();
connect(x86_af, carries[&4]);
connect(x86_af, carries[&4] ^ invert_src0);
#[hdl]
let x86_of = wire();
#[hdl]
@ -125,7 +125,7 @@ fn add_sub<C: PhantomConstCpuConfig, SrcCount: KnownSize>(
#[hdl]
let x86_zf = wire();
let set_x86_flags = |width| {
connect(x86_cf, carries[&width]);
connect(x86_cf, carries[&width] ^ invert_src0);
connect(x86_of, carries[&width].cmp_ne(carries[&(width - 1)]));
connect(x86_sf, sum[width - 1]);
connect(x86_zf, sum[..width].cmp_eq(0u8));

8
crates/cpu/tests/expected/rename_execute_retire_save_restore_gprs_real.vcd generated
View file

@ -87513,6 +87513,8 @@ b1111111111111111111111111111111111111111111111111111111111110001 Z<_QG
b1111111111111111111111111111111111111111111111111111111111111111 `cG{N"
b1111111111111111111111111111111111111111111111111111100000000001 6-Q>d"
b1111111111111111111110000000000111111111111111111111100000000001 Z<_QG"
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0fa7hn"
@ -87924,7 +87926,7 @@ b1100000000000 6-Q>d"
0rruTn"
0<#SlY"
b1100000000000 Z<_QG"
0t/pUF"
1NCFTu"
0q=,:m"
1`(dU("
0YQaZZ"
@ -170291,8 +170293,6 @@ b1111111111111111111111111111111111111111111111111111100000110000 LirfL"
1FIp"#"
1KUwM{"
b1111111111111111111110000011000011111111111111111111100000110000 $ru{a"
1R+kd["
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@ -170466,8 +170466,6 @@ b11111100000000 LirfL"
0FIp"#"
0KUwM{"
b11111100000000 $ru{a"
0R+kd["
0AvcH="
0oOiyJ"
0cq($'"
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