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x87 FPU state instructions do not use an f32 memory location

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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 5e713f621a
commit 6aff3ef558
1 changed files with 4 additions and 4 deletions
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8
lib/Target/X86/X86InstrFPStack.td
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@ -392,13 +392,13 @@ def FICOMP32m: FPI<0xDA, MRM3m, (outs), (ins i32mem:$src), "ficomp{l}\t$src">;
let SchedRW = [WriteMicrocoded] in {
let Defs = [FPSW, FPCW], mayLoad = 1 in {
def FLDENVm : FPI<0xD9, MRM4m, (outs), (ins f32mem:$src), "fldenv\t$src">;
def FRSTORm : FPI<0xDD, MRM4m, (outs), (ins f32mem:$dst), "frstor\t$dst">;
def FLDENVm : FPI<0xD9, MRM4m, (outs), (ins anymem:$src), "fldenv\t$src">;
def FRSTORm : FPI<0xDD, MRM4m, (outs), (ins anymem:$src), "frstor\t$src">;
}
let Defs = [FPSW, FPCW], Uses = [FPSW, FPCW], mayStore = 1 in {
def FSTENVm : FPI<0xD9, MRM6m, (outs), (ins f32mem:$dst), "fnstenv\t$dst">;
def FSAVEm : FPI<0xDD, MRM6m, (outs), (ins f32mem:$dst), "fnsave\t$dst">;
def FSTENVm : FPI<0xD9, MRM6m, (outs), (ins anymem:$dst), "fnstenv\t$dst">;
def FSAVEm : FPI<0xDD, MRM6m, (outs), (ins anymem:$dst), "fnsave\t$dst">;
}
let Uses = [FPSW], mayStore = 1 in