T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86: add encoding for bnot.b1.

Browse Source 
Fixes #1743.

Co-authored-by: iximeow <git@iximeow.net>
This commit is contained in:
whitequark
2020-05-21 22:09:25 +00:00
committed by Andrew Brown
parent b017844bef
commit 880e692fd4
2 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
cranelift/codegen/meta/src/isa/x86/encodings.rs
View File

@@ -1454,6 +1454,7 @@ fn define_alu(
// x86 has a bitwise not instruction NOT. // x86 has a bitwise not instruction NOT.
e.enc_i32_i64(bnot, rec_ur.opcodes(&NOT).rrr(2)); e.enc_i32_i64(bnot, rec_ur.opcodes(&NOT).rrr(2));
e.enc_b32_b64(bnot, rec_ur.opcodes(&NOT).rrr(2)); e.enc_b32_b64(bnot, rec_ur.opcodes(&NOT).rrr(2));
e.enc_both(bnot.bind(B1), rec_ur.opcodes(&NOT).rrr(2));
// Also add a `b1` encodings for the logic instructions. // Also add a `b1` encodings for the logic instructions.
// TODO: Should this be done with 8-bit instructions? It would improve partial register // TODO: Should this be done with 8-bit instructions? It would improve partial register

14
cranelift/filetests/filetests/isa/x86/bnot-b1.clif Normal file
View File

@@ -0,0 +1,14 @@
test binemit
test run
target x86_64
function u0:323() -> b1 {
block0:
[-,%rax] v221 = bconst.b1 false ; bin: 40 b8 00000000
[-,%rcx] v222 = bconst.b1 true ; bin: 40 b9 00000001
[-,%rax] v223 = bnot v221 ; bin: 40 f7 d0
[-,%rax] v224 = band v223, v222 ; bin: 40 21 c8
return v224
}
; run