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FPU float<->int conversion optimization

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This commit is contained in:
Blaise Tine
2020-12-29 15:37:45 -08:00
parent e83c4638a0
commit d44144f72f
53 changed files with 993 additions and 4953 deletions
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93
hw/rtl/fp_cores/svdpi/float_dpi.cpp
View File

@@ -10,14 +10,17 @@
extern "C" {
int dpi_register();
void dpi_fmadd(int inst, bool enable, int a, int b, int c, int* result);
void dpi_fdiv(int inst, bool enable, int a, int b, int* result);
void dpi_fsqrt(int inst, bool enable, int a, int* result);
void dpi_ftoi(int inst, bool enable, int a, int* result);
void dpi_ftou(int inst, bool enable, int a, int* result);
void dpi_itof(int inst, bool enable, int a, int* result);
void dpi_utof(int inst, bool enable, int a, int* result);
void dpi_delayed_assert(int inst, bool cond);
void dpi_fadd(int inst, bool enable, int a, int b, int delay, int* result);
void dpi_fsub(int inst, bool enable, int a, int b, int delay, int* result);
void dpi_fmul(int inst, bool enable, int a, int b, int delay, int* result);
void dpi_fmadd(int inst, bool enable, int a, int b, int c, int delay, int* result);
void dpi_fdiv(int inst, bool enable, int a, int b, int delay, int* result);
void dpi_fsqrt(int inst, bool enable, int a, int delay, int* result);
void dpi_ftoi(int inst, bool enable, int a, int delay, int* result);
void dpi_ftou(int inst, bool enable, int a, int delay, int* result);
void dpi_itof(int inst, bool enable, int a, int delay, int* result);
void dpi_utof(int inst, bool enable, int a, int delay, int* result);
void dpi_assert(int inst, bool cond, int delay);
}
class ShiftRegister {
@@ -87,7 +90,49 @@ int dpi_register() {
return instances.allocate();
}
void dpi_fmadd(int inst, bool enable, int a, int b, int c, int* result) {
void dpi_fadd(int inst, bool enable, int a, int b, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f + fb.f;
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_fsub(int inst, bool enable, int a, int b, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f - fb.f;
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_fmul(int inst, bool enable, int a, int b, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f * fb.f;
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_fmadd(int inst, bool enable, int a, int b, int c, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fb, fc, fr;
@@ -97,12 +142,12 @@ void dpi_fmadd(int inst, bool enable, int a, int b, int c, int* result) {
fc.i = c;
fr.f = fa.f * fb.f + fc.f;
sr.ensure_init(LATENCY_FMADD);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_fdiv(int inst, bool enable, int a, int b, int* result) {
void dpi_fdiv(int inst, bool enable, int a, int b, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fb, fr;
@@ -111,12 +156,12 @@ void dpi_fdiv(int inst, bool enable, int a, int b, int* result) {
fb.i = b;
fr.f = fa.f / fb.f;
sr.ensure_init(LATENCY_FDIV);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_fsqrt(int inst, bool enable, int a, int* result) {
void dpi_fsqrt(int inst, bool enable, int a, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fr;
@@ -124,12 +169,12 @@ void dpi_fsqrt(int inst, bool enable, int a, int* result) {
fa.i = a;
fr.f = sqrtf(fa.f);
sr.ensure_init(LATENCY_FSQRT);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_ftoi(int inst, bool enable, int a, int* result) {
void dpi_ftoi(int inst, bool enable, int a, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fr;
@@ -137,12 +182,12 @@ void dpi_ftoi(int inst, bool enable, int a, int* result) {
fa.i = a;
fr.i = int(fa.f);
sr.ensure_init(LATENCY_FTOI);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_ftou(int inst, bool enable, int a, int* result) {
void dpi_ftou(int inst, bool enable, int a, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fr;
@@ -150,24 +195,24 @@ void dpi_ftou(int inst, bool enable, int a, int* result) {
fa.i = a;
fr.i = unsigned(fa.f);
sr.ensure_init(LATENCY_FTOI);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_itof(int inst, bool enable, int a, int* result) {
void dpi_itof(int inst, bool enable, int a, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fr;
fr.f = (float)a;
sr.ensure_init(LATENCY_ITOF);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_utof(int inst, bool enable, int a, int* result) {
void dpi_utof(int inst, bool enable, int a, int delay, int* result) {
ShiftRegister& sr = instances.get(inst);
Float_t fa, fr;
@@ -175,15 +220,15 @@ void dpi_utof(int inst, bool enable, int a, int* result) {
unsigned ua = a;
fr.f = (float)ua;
sr.ensure_init(LATENCY_ITOF);
sr.ensure_init(delay);
sr.push(fr.i, enable);
*result = sr.top();
}
void dpi_delayed_assert(int inst, bool cond) {
void dpi_assert(int inst, bool cond, int delay) {
ShiftRegister& sr = instances.get(inst);
sr.ensure_init(2);
sr.ensure_init(delay);
sr.push(!cond, 1);
auto status = sr.top();

24
hw/rtl/fp_cores/svdpi/float_dpi.vh
View File

@@ -3,18 +3,18 @@
import "DPI-C" context function int dpi_register();
import "DPI-C" context function void dpi_fadd(int inst, input logic enable, input int a, input int b, output int result);
import "DPI-C" context function void dpi_fsub(int inst, input logic enable, input int a, input int b, output int result);
import "DPI-C" context function void dpi_fmul(int inst, input logic enable, input int a, input int b, output int result);
import "DPI-C" context function void dpi_fmadd(int inst, input logic enable, input int a, input int b, input int c, output int result);
import "DPI-C" context function void dpi_fmsub(int inst, input logic enable, input int a, input int b, input int c, output int result);
import "DPI-C" context function void dpi_fdiv(int inst, input logic enable, input int a, input int b, output int result);
import "DPI-C" context function void dpi_fsqrt(int inst, input logic enable, input int a, output int result);
import "DPI-C" context function void dpi_ftoi(int inst, input logic enable, input int a, output int result);
import "DPI-C" context function void dpi_ftou(int inst, input logic enable, input int a, output int result);
import "DPI-C" context function void dpi_itof(int inst, input logic enable, input int a, output int result);
import "DPI-C" context function void dpi_utof(int inst, input logic enable, input int a, output int result);
import "DPI-C" context function void dpi_fadd(int inst, input logic enable, input int a, input int b, input int delay, output int result);
import "DPI-C" context function void dpi_fsub(int inst, input logic enable, input int a, input int b, input int delay, output int result);
import "DPI-C" context function void dpi_fmul(int inst, input logic enable, input int a, input int b, input int delay, output int result);
import "DPI-C" context function void dpi_fmadd(int inst, input logic enable, input int a, input int b, input int c, input int delay, output int result);
import "DPI-C" context function void dpi_fmsub(int inst, input logic enable, input int a, input int b, input int c, input int delay, output int result);
import "DPI-C" context function void dpi_fdiv(int inst, input logic enable, input int a, input int b, input int delay, output int result);
import "DPI-C" context function void dpi_fsqrt(int inst, input logic enable, input int a, input int delay, output int result);
import "DPI-C" context function void dpi_ftoi(int inst, input logic enable, input int a, input int delay, output int result);
import "DPI-C" context function void dpi_ftou(int inst, input logic enable, input int a, input int delay, output int result);
import "DPI-C" context function void dpi_itof(int inst, input logic enable, input int a, input int delay, output int result);
import "DPI-C" context function void dpi_utof(int inst, input logic enable, input int a, input int delay, output int result);
import "DPI-C" context function void dpi_delayed_assert(int inst, input logic cond);
import "DPI-C" context function void dpi_assert(int inst, input logic cond, input int delay);
`endif