search for: fmrdh

Displaying 2 results from an estimated 2 matches for "fmrdh".

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2006 Oct 02
2
[LLVMdev] returning a double in two registers
...in the ARM backend. According to the ABI, 32 bit floating point numbers should be returned in R0 and 64bit ones in R0/R1. I have solved the 32 bit case by inserting bit_converts in LowerRET. For the 64bit case I considered two options: 1) Creating two nodes. fp_lo and fp_hi. I could then select fmrdh and fmrdl with (set IntRegs:$dst (bitconvert (fp_hi DFPRegs:$src))) and (set IntRegs:$dst (bitconvert (fp_lo DFPRegs:$src))) 2) Create a node similar to copytoreg that has two results. This has the advantage that it is possible to select fmrrd. I am currently trying to implement 2, but I am not s...
2006 Oct 02
0
[LLVMdev] returning a double in two registers
...he ABI, 32 bit floating point numbers should be returned > in R0 and 64bit ones in R0/R1. Ok. > I have solved the 32 bit case by inserting bit_converts in LowerRET. Yep. > For the 64bit case I considered two options: > > 1) Creating two nodes. fp_lo and fp_hi. I could then select fmrdh and fmrdl with > (set IntRegs:$dst (bitconvert (fp_hi DFPRegs:$src))) and > (set IntRegs:$dst (bitconvert (fp_lo DFPRegs:$src))) Alternatively, you could merge bitconvert into the fp_hi/lo flags. That would make the pattern simpler, and eliminate the need to have to match a bare fp_hi/fp_...