[llvm-dev] mapping calls to exp() to expf opcode

[Phil Tomson via llvm-dev]

We've got both an sqrtf and an expf opcode in our architecture. If I call
sqrt() on the C side, I see the sqrtf opcode show up in the generated
assembly. However, if I call exp() on the C side, I don't see the expf
opcode show up on the generated assembly, I see a call to an exp function
from libm.

Here's what we've got in our TargetInstrinfo.td file for both of these
instructions:
def SQRTF64 : Other2ROp< 0b0001101, "sqrtF", fsqrt, OpInfo_F64, II_ELEMF3 >;
def SQRTF32 : Other2ROp< 0b0001101, "sqrtF", fsqrt, OpInfo_F32, II_ELEMF1 >;

def EXPF64 :   Other2ROp< 0b0001010, "expF", fexp2, OpInfo_F64, II_ELEMF3 >;
def EXPF32 :   Other2ROp< 0b0001010, "expF", fexp2, OpInfo_F32, II_ELEMF1 >;


..essentially the same kind of definition for both SQRTF and EXPF, but for
the latter I don't see expf opcodes being generated.

Any idea what might be missing for exp?

Phil
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