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Added comments in fcvt

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This commit is contained in:
David Harris 2022-04-17 16:53:10 +00:00
parent d71940d96d
commit 6769f0cb43
3 changed files with 11 additions and 1 deletions
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0
pipelined/regression/wkdir/README
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8
pipelined/src/fpu/fcvtfp.sv
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@ -30,11 +30,17 @@ module cvtfp (
logic [31:0] DSRes; // double to single precision result logic [31:0] DSRes; // double to single precision result
// add support for all formats
// consider reordering code blocks so upconverting is in one region of the file
// and downconverting is in the other region.
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// LZC // LZC: Leading Zero Counter
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// *** consider sharing this with fcvtint
// *** emphasize parallel structure between the two
// *** add a priorityencoder module to generic (similar to priorityonehot) and use it
// LZC - find the first 1 in the input's mantissa // LZC - find the first 1 in the input's mantissa
logic [8:0] i,NormCnt; logic [8:0] i,NormCnt;

4
pipelined/src/fpu/fcvtint.sv
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@ -62,6 +62,10 @@ module fcvt (
// fcvt.d.lu = 110 // fcvt.d.lu = 110
// {long, unsigned, to int} // {long, unsigned, to int}
// *** revisit this module, explain in more depth
// should the int to fp and fp to int paths be separated?
// add support for all formats
// calculate signals based off the input and output's size // calculate signals based off the input and output's size
assign Res64 = (FOpCtrlE[0]&FOpCtrlE[2]) | (FmtE&~FOpCtrlE[0]); assign Res64 = (FOpCtrlE[0]&FOpCtrlE[2]) | (FmtE&~FOpCtrlE[0]);
assign In64 = (~FOpCtrlE[0]&FOpCtrlE[2]) | (FmtE&FOpCtrlE[0]); assign In64 = (~FOpCtrlE[0]&FOpCtrlE[2]) | (FmtE&FOpCtrlE[0]);