maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

x87 FPU state instructions do not use an f32 memory location 

These instructions actually use a 512-byte location, where bytes 464-511 are ignored.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D86942
This commit is contained in:
Eric Astor 2020-09-01 13:49:35 -04:00
parent 7be8682921
commit a57fdcdd40
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
llvm/lib/Target/X86/X86InstrFPStack.td
View File

@ -392,13 +392,13 @@ def FICOMP32m: FPI<0xDA, MRM3m, (outs), (ins i32mem:$src), "ficomp{l}\t$src">;
let SchedRW = [WriteMicrocoded] in { let SchedRW = [WriteMicrocoded] in {
let Defs = [FPSW, FPCW], mayLoad = 1 in { let Defs = [FPSW, FPCW], mayLoad = 1 in {
def FLDENVm : FPI<0xD9, MRM4m, (outs), (ins f32mem:$src), "fldenv\t$src">; def FLDENVm : FPI<0xD9, MRM4m, (outs), (ins anymem:$src), "fldenv\t$src">;
def FRSTORm : FPI<0xDD, MRM4m, (outs), (ins f32mem:$dst), "frstor\t$dst">; def FRSTORm : FPI<0xDD, MRM4m, (outs), (ins anymem:$src), "frstor\t$src">;
} }
let Defs = [FPSW, FPCW], Uses = [FPSW, FPCW], mayStore = 1 in { let Defs = [FPSW, FPCW], Uses = [FPSW, FPCW], mayStore = 1 in {
def FSTENVm : FPI<0xD9, MRM6m, (outs), (ins f32mem:$dst), "fnstenv\t$dst">; def FSTENVm : FPI<0xD9, MRM6m, (outs), (ins anymem:$dst), "fnstenv\t$dst">;
def FSAVEm : FPI<0xDD, MRM6m, (outs), (ins f32mem:$dst), "fnsave\t$dst">; def FSAVEm : FPI<0xDD, MRM6m, (outs), (ins anymem:$dst), "fnsave\t$dst">;
} }
let Uses = [FPSW], mayStore = 1 in let Uses = [FPSW], mayStore = 1 in