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Comment RocketConfigs and fft test

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This commit is contained in:
Animesh Agrawal
2022-01-22 13:24:09 -08:00
parent 807cf7f11c
commit e773558180
2 changed files with 9 additions and 7 deletions
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2
generators/chipyard/src/main/scala/config/RocketConfigs.scala
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@@ -22,7 +22,7 @@ class TinyRocketConfig extends Config(
new chipyard.config.AbstractConfig)
class FFTRocketConfig extends Config(
new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8, width=16, decPt=8) ++
new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8, width=16, decPt=8) ++ // add 8-point mmio fft at 0x2000 with 16bit fixed-point numbers.
new freechips.rocketchip.subsystem.WithNBigCores(1) ++
new chipyard.config.AbstractConfig)

14
tests/fft.c
View File

@@ -1,12 +1,14 @@
#define FFT_WRITE_LANE 0x2000
#define FFT_RD_LANE_BASE 0x2008
// addr of read lane i is FFT_RD_LANE_BASE + i * 8
/* This Test should be used with the fft generator config -- FFTRocketConfig. */
#include <stdio.h>
#include <inttypes.h>
#include <math.h>
// from test_pts.py
#define FFT_WRITE_LANE 0x2000
#define FFT_RD_LANE_BASE 0x2008
// addr of read lane i is FFT_RD_LANE_BASE + i * 8
// from generators/fft-generator/test_pts.py (in the fft-generator repo)
// point size (and therefore integer width/uint32_t) determined by IOWidth from Tail.scala
// point size is 2 * IOWidth since both real and imaginary components get IOWidth bits
const uint32_t points[8] = {
@@ -24,8 +26,8 @@ const uint32_t expected_outputs[8] = {
0x00000000, // read 0
0x00000000, // read 1
0x00000000, // read 2
0xffff0000, // read 3
0x00000000, // read 4 -- real portion is 0xff (very small negative number)
0xffff0000, // read 3 -- real portion is 0xff (very small negative number)
0x00000000, // read 4
0x00000000, // read 5
0x00000000, // read 6
0x05a8fa57, // read 7 -- real: ~5.656 imaginary: ~-5.656