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| author | gatecat <gatecat@ds0.me> | 2021-02-20 10:51:57 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-02-20 10:51:57 +0000 |
| commit | 6672f17d0a546054412c3ecad29a5414ffdcd971 (patch) | |
| tree | e0976dd397edf50fe89b5108751c5fb3a7ace896 /docs/archapi.md | |
| parent | 130c5cc76882c2f07836b97040e6bc1d93e4efe9 (diff) | |
| parent | e571c707b50a601787590b9752205336ee1c3f6d (diff) | |
| download | nextpnr-6672f17d0a546054412c3ecad29a5414ffdcd971.tar.gz nextpnr-6672f17d0a546054412c3ecad29a5414ffdcd971.tar.bz2 nextpnr-6672f17d0a546054412c3ecad29a5414ffdcd971.zip | |
Merge pull request #592 from YosysHQ/gatecat/rework-delay
Replace DelayInfo with DelayPair and DelayQuad
Diffstat (limited to 'docs/archapi.md')
| -rw-r--r-- | docs/archapi.md | 25 |
1 files changed, 5 insertions, 20 deletions
diff --git a/docs/archapi.md b/docs/archapi.md index 96d96e80..9ecb1bf1 100644 --- a/docs/archapi.md +++ b/docs/archapi.md @@ -43,21 +43,6 @@ With the exception of `ArchNetInfo` and `ArchCellInfo`, the following types shou A scalar type that is used to represent delays. May be an integer or float type. -### DelayInfo - -A struct representing the delay across a timing arc. Must provide a `+` operator for getting the combined delay of two arcs, and the following methods to access concrete timings: - -``` -delay_t minRaiseDelay() const { return delay; } -delay_t maxRaiseDelay() const { return delay; } - -delay_t minFallDelay() const { return delay; } -delay_t maxFallDelay() const { return delay; } - -delay_t minDelay() const { return delay; } -delay_t maxDelay() const { return delay; } -``` - ### BelId A type representing a bel name. `BelId()` must construct a unique null-value. Must provide `==`, `!=`, and `<` operators and a specialization for `std::hash<BelId>`. @@ -332,7 +317,7 @@ will make the given wire available. *BaseArch default: returns `getBoundWireNet(wire)`* -### DelayInfo getWireDelay(WireId wire) const +### DelayQuad getWireDelay(WireId wire) const Get the delay for a wire. @@ -448,7 +433,7 @@ Get the destination wire for a pip. Bi-directional switches (transfer gates) are modeled using two anti-parallel pips. -### DelayInfo getPipDelay(PipId pip) const +### DelayQuad getPipDelay(PipId pip) const Get the delay for a pip. @@ -541,9 +526,9 @@ actual penalty used is a multiple of this value (i.e. a weighted version of this Convert an `delay_t` to an actual real-world delay in nanoseconds. -### DelayInfo getDelayFromNS(float v) const +### delay_t getDelayFromNS(float v) const -Convert a real-world delay in nanoseconds to a DelayInfo with equal min/max rising/falling values. +Convert a real-world delay in nanoseconds to a `delay_t`. ### uint32\_t getDelayChecksum(delay\_t v) const @@ -609,7 +594,7 @@ Return the decal and X/Y position for the graphics representing a group. Cell Delay Methods ------------------ -### bool getCellDelay(const CellInfo \*cell, IdString fromPort, IdString toPort, DelayInfo &delay) const +### bool getCellDelay(const CellInfo \*cell, IdString fromPort, IdString toPort, DelayQuad &delay) const Returns the delay for the specified path through a cell in the `&delay` argument. The method returns false if there is no timing relationship from `fromPort` to `toPort`. |