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Revert "[X86][BF16] Add libcall for F80 -> BF16" #109140

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Merged
merged 1 commit into from
Sep 18, 2024
Merged

Revert "[X86][BF16] Add libcall for F80 -> BF16" #109140

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1 change: 0 additions & 1 deletion compiler-rt/lib/builtins/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -192,7 +192,6 @@ set(GENERIC_SOURCES
set(BF16_SOURCES
extendbfsf2.c
truncdfbf2.c
truncxfbf2.c
truncsfbf2.c
)

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13 changes: 0 additions & 13 deletions compiler-rt/lib/builtins/truncxfbf2.c
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1 change: 0 additions & 1 deletion llvm/include/llvm/IR/RuntimeLibcalls.def
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Expand Up @@ -367,7 +367,6 @@ HANDLE_LIBCALL(FPROUND_F128_F16, "__trunctfhf2")
HANDLE_LIBCALL(FPROUND_PPCF128_F16, "__trunctfhf2")
HANDLE_LIBCALL(FPROUND_F32_BF16, "__truncsfbf2")
HANDLE_LIBCALL(FPROUND_F64_BF16, "__truncdfbf2")
HANDLE_LIBCALL(FPROUND_F80_BF16, "__truncxfbf2")
HANDLE_LIBCALL(FPROUND_F64_F32, "__truncdfsf2")
HANDLE_LIBCALL(FPROUND_F80_F32, "__truncxfsf2")
HANDLE_LIBCALL(FPROUND_F128_F32, "__trunctfsf2")
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2 changes: 0 additions & 2 deletions llvm/lib/CodeGen/TargetLoweringBase.cpp
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Expand Up @@ -169,8 +169,6 @@ RTLIB::Libcall RTLIB::getFPROUND(EVT OpVT, EVT RetVT) {
return FPROUND_F32_BF16;
if (OpVT == MVT::f64)
return FPROUND_F64_BF16;
if (OpVT == MVT::f80)
return FPROUND_F80_BF16;
} else if (RetVT == MVT::f32) {
if (OpVT == MVT::f64)
return FPROUND_F64_F32;
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22 changes: 0 additions & 22 deletions llvm/test/CodeGen/X86/bfloat.ll
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Expand Up @@ -1953,25 +1953,3 @@ define void @PR92471(ptr %0, ptr %1) nounwind {
store <7 x float> %4, ptr %1, align 4
ret void
}

define bfloat @PR108936(x86_fp80 %0) nounwind {
; X86-LABEL: PR108936:
; X86: # %bb.0:
; X86-NEXT: subl $12, %esp
; X86-NEXT: fldt {{[0-9]+}}(%esp)
; X86-NEXT: fstpt (%esp)
; X86-NEXT: calll __truncxfbf2
; X86-NEXT: addl $12, %esp
; X86-NEXT: retl
;
; CHECK-LABEL: PR108936:
; CHECK: # %bb.0:
; CHECK-NEXT: subq $24, %rsp
; CHECK-NEXT: fldt {{[0-9]+}}(%rsp)
; CHECK-NEXT: fstpt (%rsp)
; CHECK-NEXT: callq __truncxfbf2@PLT
; CHECK-NEXT: addq $24, %rsp
; CHECK-NEXT: retq
%2 = fptrunc x86_fp80 %0 to bfloat
ret bfloat %2
}
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