diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCTargetMachine.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCTargetMachine.cpp | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp index 074bc870751a..1daf244fed44 100644 --- a/lib/Target/PowerPC/PPCTargetMachine.cpp +++ b/lib/Target/PowerPC/PPCTargetMachine.cpp @@ -172,7 +172,26 @@ PPCTargetMachine::PPCTargetMachine(const Target &T, const Triple &TT, : LLVMTargetMachine(T, getDataLayoutString(TT), TT, CPU, computeFSAdditions(FS, OL, TT), Options, RM, CM, OL), TLOF(createTLOF(getTargetTriple())), - TargetABI(computeTargetABI(TT, Options)) { + TargetABI(computeTargetABI(TT, Options)), + Subtarget(TargetTriple, CPU, computeFSAdditions(FS, OL, TT), *this) { + + // For the estimates, convergence is quadratic, so we essentially double the + // number of digits correct after every iteration. For both FRE and FRSQRTE, + // the minimum architected relative accuracy is 2^-5. When hasRecipPrec(), + // this is 2^-14. IEEE float has 23 digits and double has 52 digits. + unsigned RefinementSteps = Subtarget.hasRecipPrec() ? 1 : 3, + RefinementSteps64 = RefinementSteps + 1; + + this->Options.Reciprocals.setDefaults("sqrtf", true, RefinementSteps); + this->Options.Reciprocals.setDefaults("vec-sqrtf", true, RefinementSteps); + this->Options.Reciprocals.setDefaults("divf", true, RefinementSteps); + this->Options.Reciprocals.setDefaults("vec-divf", true, RefinementSteps); + + this->Options.Reciprocals.setDefaults("sqrtd", true, RefinementSteps64); + this->Options.Reciprocals.setDefaults("vec-sqrtd", true, RefinementSteps64); + this->Options.Reciprocals.setDefaults("divd", true, RefinementSteps64); + this->Options.Reciprocals.setDefaults("vec-divd", true, RefinementSteps64); + initAsmInfo(); } |