================
@@ -1145,6 +1165,77 @@ CIRGenFunction::emitX86BuiltinExpr(unsigned builtinID,
const CallExpr *expr) {
// Return timestamp (element 0 of the returned struct)
return cir::ExtractMemberOp::create(builder, loc, i64Ty, result, 0);
}
+ case X86::BI__builtin_ia32_roundps:
+ case X86::BI__builtin_ia32_roundpd:
+ case X86::BI__builtin_ia32_roundps256:
+ case X86::BI__builtin_ia32_roundpd256: {
+ unsigned m =
+ ops[1].getDefiningOp<cir::ConstantOp>().getIntValue().getZExtValue();
+ constexpr unsigned mxcsrMask = 0b100;
+ constexpr unsigned fRoundNoExcMask = 0b1000;
+ unsigned useMXCSR = mxcsrMask & m;
+ unsigned fRoundNoExc = fRoundNoExcMask & m;
+
+ mlir::Location loc = getLoc(expr->getExprLoc());
+
+ if (useMXCSR || !fRoundNoExc) {
----------------
borysperski wrote:
@andykaylor thanks for the detailed analysis, and thanks @phoebewang for the
additional context. Could you let me know which approach I should take? Happy
to do the work - just want to make sure I'm heading in the right direction.
https://github.com/llvm/llvm-project/pull/215787
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