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[Power9] Add __float128 library call for frem 

Power 9 does not have a hardware instruction for frem but we can call fmodf128.

Differential Revision: https://reviews.llvm.org/D48552

llvm-svn: 336406
This commit is contained in:
Stefan Pintilie 2018-07-06 02:47:02 +00:00
parent 1f200adfa7
commit b351f09c9e
2 changed files with 16 additions and 0 deletions
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2
llvm/lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -820,6 +820,7 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
setOperationAction(ISD::FCOS , MVT::f128, Expand);
setOperationAction(ISD::FPOW, MVT::f128, Expand);
setOperationAction(ISD::FPOWI, MVT::f128, Expand);
setOperationAction(ISD::FREM, MVT::f128, Expand);
}
}
@ -1070,6 +1071,7 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
setLibcallName(RTLIB::FMIN_F128, "fminf128");
setLibcallName(RTLIB::FMAX_F128, "fmaxf128");
setLibcallName(RTLIB::POWI_F128, "__powikf2");
setLibcallName(RTLIB::REM_F128, "fmodf128");
}
// With 32 condition bits, we don't need to sink (and duplicate) compares

14
llvm/test/CodeGen/PowerPC/f128-arith.ll
View File

@ -293,3 +293,17 @@ entry:
ret void
}
declare fp128 @llvm.powi.f128(fp128 %Val, i32 %power)
@a = common global fp128 0xL00000000000000000000000000000000, align 16
@b = common global fp128 0xL00000000000000000000000000000000, align 16
define fp128 @qp_frem() #0 {
entry:
%0 = load fp128, fp128* @a, align 16
%1 = load fp128, fp128* @b, align 16
%rem = frem fp128 %0, %1
ret fp128 %rem
; CHECK-LABEL: qp_frem
; CHECK: bl fmodf128
; CHECK: blr
}