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softfloat library integration

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This commit is contained in:
Blaise Tine
2021-10-10 13:20:50 -07:00
parent 28e26f3130
commit b8682f56ac
21 changed files with 400 additions and 818 deletions
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347
hw/dpi/float_dpi.cpp
View File

@@ -4,293 +4,168 @@
#include <vector>
#include <mutex>
#include <iostream>
#include <rvfloats.h>
#include "svdpi.h"
#include "verilated_vpi.h"
#include "VX_config.h"
extern "C" {
void dpi_fadd(int a, int b, int frm, int* result, int* fflags);
void dpi_fsub(int a, int b, int frm, int* result, int* fflags);
void dpi_fmul(int a, int b, int frm, int* result, int* fflags);
void dpi_fmadd(int a, int b, int c, int frm, int* result, int* fflags);
void dpi_fmsub(int a, int b, int c, int frm, int* result, int* fflags);
void dpi_fnmadd(int a, int b, int c, int frm, int* result, int* fflags);
void dpi_fnmsub(int a, int b, int c, int frm, int* result, int* fflags);
void dpi_fadd(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fsub(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fmul(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fmadd(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fmsub(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fnmadd(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fnmsub(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fdiv(int a, int b, int frm, int* result, int* fflags);
void dpi_fsqrt(int a, int frm, int* result, int* fflags);
void dpi_fdiv(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fsqrt(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_ftoi(int a, int frm, int* result, int* fflags);
void dpi_ftou(int a, int frm, int* result, int* fflags);
void dpi_itof(int a, int frm, int* result, int* fflags);
void dpi_utof(int a, int frm, int* result, int* fflags);
void dpi_ftoi(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_ftou(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_itof(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_utof(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags);
void dpi_fclss(int a, int* result);
void dpi_fsgnj(int a, int b, int* result);
void dpi_fsgnjn(int a, int b, int* result);
void dpi_fsgnjx(int a, int b, int* result);
void dpi_fclss(bool enable, int a, int* result);
void dpi_fsgnj(bool enable, int a, int b, int* result);
void dpi_fsgnjn(bool enable, int a, int b, int* result);
void dpi_fsgnjx(bool enable, int a, int b, int* result);
void dpi_flt(int a, int b, int* result, int* fflags);
void dpi_fle(int a, int b, int* result, int* fflags);
void dpi_feq(int a, int b, int* result, int* fflags);
void dpi_fmin(int a, int b, int* result, int* fflags);
void dpi_fmax(int a, int b, int* result, int* fflags);
void dpi_flt(bool enable, int a, int b, int* result, svBitVecVal* fflags);
void dpi_fle(bool enable, int a, int b, int* result, svBitVecVal* fflags);
void dpi_feq(bool enable, int a, int b, int* result, svBitVecVal* fflags);
void dpi_fmin(bool enable, int a, int b, int* result, svBitVecVal* fflags);
void dpi_fmax(bool enable, int a, int b, int* result, svBitVecVal* fflags);
}
union Float_t {
float f;
int i;
struct {
uint32_t man : 23;
uint32_t exp : 8;
uint32_t sign : 1;
} parts;
};
void dpi_fadd(int a, int b, int frm, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f + fb.f;
*result = fr.i;
*fflags = 0;
void dpi_fadd(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fadd(a, b, (*frm & 0x7), fflags);
}
void dpi_fsub(int a, int b, int frm, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f - fb.f;
*result = fr.i;
*fflags = 0;
void dpi_fsub(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fsub(a, b, (*frm & 0x7), fflags);
}
void dpi_fmul(int a, int b, int frm, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f * fb.f;
*result = fr.i;
*fflags = 0;
void dpi_fmul(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fmul(a, b, (*frm & 0x7), fflags);
}
void dpi_fmadd(int a, int b, int c, int frm, int* result, int* fflags) {
Float_t fa, fb, fc, fr;
fa.i = a;
fb.i = b;
fc.i = c;
fr.f = fa.f * fb.f + fc.f;
*result = fr.i;
*fflags = 0;
void dpi_fmadd(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fmadd(a, b, c, (*frm & 0x7), fflags);
}
void dpi_fmsub(int a, int b, int c, int frm, int* result, int* fflags) {
Float_t fa, fb, fc, fr;
fa.i = a;
fb.i = b;
fc.i = c;
fr.f = fa.f * fb.f - fc.f;
*result = fr.i;
*fflags = 0;
void dpi_fmsub(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fmsub(a, b, c, (*frm & 0x7), fflags);
}
void dpi_fnmadd(int a, int b, int c, int frm, int* result, int* fflags) {
Float_t fa, fb, fc, fr;
fa.i = a;
fb.i = b;
fc.i = c;
fr.f = -(fa.f * fb.f + fc.f);
*result = fr.i;
*fflags = 0;
void dpi_fnmadd(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fnmadd(a, b, c, (*frm & 0x7), fflags);
}
void dpi_fnmsub(int a, int b, int c, int frm, int* result, int* fflags) {
Float_t fa, fb, fc, fr;
fa.i = a;
fb.i = b;
fc.i = c;
fr.f = -(fa.f * fb.f - fc.f);
*result = fr.i;
*fflags = 0;
void dpi_fnmsub(bool enable, int a, int b, int c, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fnmsub(a, b, c, (*frm & 0x7), fflags);
}
void dpi_fdiv(int a, int b, int frm, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = fa.f / fb.f;
*result = fr.i;
*fflags = 0;
void dpi_fdiv(bool enable, int a, int b, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fdiv(a, b, (*frm & 0x7), fflags);
}
void dpi_fsqrt(int a, int frm, int* result, int* fflags) {
Float_t fa, fr;
fa.i = a;
fr.f = sqrtf(fa.f);
*result = fr.i;
*fflags = 0;
void dpi_fsqrt(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fsqrt(a, (*frm & 0x7), fflags);
}
void dpi_ftoi(int a, int frm, int* result, int* fflags) {
Float_t fa, fr;
fa.i = a;
fr.i = int(fa.f);
*result = fr.i;
*fflags = 0;
void dpi_ftoi(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_ftoi(a, (*frm & 0x7), fflags);
}
void dpi_ftou(int a, int frm, int* result, int* fflags) {
Float_t fa, fr;
fa.i = a;
fr.i = unsigned(fa.f);
*result = fr.i;
*fflags = 0;
void dpi_ftou(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_ftou(a, (*frm & 0x7), fflags);
}
void dpi_itof(int a, int frm, int* result, int* fflags) {
Float_t fa, fr;
fr.f = (float)a;
*result = fr.i;
*fflags = 0;
void dpi_itof(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_itof(a, (*frm & 0x7), fflags);
}
void dpi_utof(int a, int frm, int* result, int* fflags) {
Float_t fa, fr;
unsigned ua = a;
fr.f = (float)ua;
*result = fr.i;
*fflags = 0;
void dpi_utof(bool enable, int a, const svBitVecVal* frm, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_utof(a, (*frm & 0x7), fflags);
}
void dpi_flt(int a, int b, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.i = fa.f < fb.f;
*result = fr.i;
*fflags = 0;
void dpi_flt(bool enable, int a, int b, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_flt(a, b, fflags);
}
void dpi_fle(int a, int b, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.i = fa.f <= fb.f;
*result = fr.i;
*fflags = 0;
void dpi_fle(bool enable, int a, int b, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fle(a, b, fflags);
}
void dpi_feq(int a, int b, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.i = fa.f == fb.f;
*result = fr.i;
*fflags = 0;
void dpi_feq(bool enable, int a, int b, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_feq(a, b, fflags);
}
void dpi_fmin(int a, int b, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = std::min<float>(fa.f, fb.f);
*result = fr.i;
*fflags = 0;
void dpi_fmin(bool enable, int a, int b, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fmin(a, b, fflags);
}
void dpi_fmax(int a, int b, int* result, int* fflags) {
Float_t fa, fb, fr;
fa.i = a;
fb.i = b;
fr.f = std::max<float>(fa.f, fb.f);
*result = fr.i;
*fflags = 0;
void dpi_fmax(bool enable, int a, int b, int* result, svBitVecVal* fflags) {
if (!enable)
return;
*result = rv_fmax(a, b, fflags);
}
void dpi_fclss(int a, int* result) {
int r = 0; // clear all bits
bool fsign = (a >> 31);
uint32_t expo = (a >> 23) & 0xFF;
uint32_t fraction = a & 0x7FFFFF;
if ((expo == 0) && (fraction == 0)) {
r = fsign ? (1 << 3) : (1 << 4); // +/- 0
} else if ((expo == 0) && (fraction != 0)) {
r = fsign ? (1 << 2) : (1 << 5); // +/- subnormal
} else if ((expo == 0xFF) && (fraction == 0)) {
r = fsign ? (1<<0) : (1<<7); // +/- infinity
} else if ((expo == 0xFF ) && (fraction != 0)) {
if (!fsign && (fraction == 0x00400000)) {
r = (1 << 9); // quiet NaN
} else {
r = (1 << 8); // signaling NaN
}
} else {
r = fsign ? (1 << 1) : (1 << 6); // +/- normal
}
*result = r;
void dpi_fclss(bool enable, int a, int* result) {
if (!enable)
return;
*result = rv_fclss(a);
}
void dpi_fsgnj(int a, int b, int* result) {
int sign = b & 0x80000000;
int r = sign | (a & 0x7FFFFFFF);
*result = r;
void dpi_fsgnj(bool enable, int a, int b, int* result) {
if (!enable)
return;
*result = rv_fsgnj(a, b);
}
void dpi_fsgnjn(int a, int b, int* result) {
int sign = ~b & 0x80000000;
int r = sign | (a & 0x7FFFFFFF);
*result = r;
void dpi_fsgnjn(bool enable, int a, int b, int* result) {
if (!enable)
return;
*result = rv_fsgnjn(a, b);
}
void dpi_fsgnjx(int a, int b, int* result) {
int sign1 = a & 0x80000000;
int sign2 = b & 0x80000000;
int r = (sign1 ^ sign2) | (a & 0x7FFFFFFF);
*result = r;
void dpi_fsgnjx(bool enable, int a, int b, int* result) {
if (!enable)
return;
*result = rv_fsgnjx(a, b);
}

44
hw/dpi/float_dpi.vh
View File

@@ -1,31 +1,31 @@
`ifndef FLOAT_DPI
`define FLOAT_DPI
import "DPI-C" function void dpi_fadd(input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fsub(input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmul(input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmadd(input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmsub(input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fnmadd(input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fnmsub(input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fadd(input logic enable, input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fsub(input logic enable, input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmul(input logic enable, input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmadd(input logic enable, input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmsub(input logic enable, input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fnmadd(input logic enable, input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fnmsub(input logic enable, input int a, input int b, input int c, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fdiv(input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fsqrt(input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fdiv(input logic enable, input int a, input int b, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fsqrt(input logic enable, input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_ftoi(input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_ftou(input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_itof(input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_utof(input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_ftoi(input logic enable, input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_ftou(input logic enable, input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_itof(input logic enable, input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_utof(input logic enable, input int a, input bit[2:0] frm, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fclss(input int a, output int result);
import "DPI-C" function void dpi_fsgnj(input int a, input int b, output int result);
import "DPI-C" function void dpi_fsgnjn(input int a, input int b, output int result);
import "DPI-C" function void dpi_fsgnjx(input int a, input int b, output int result);
import "DPI-C" function void dpi_fclss(input logic enable, input int a, output int result);
import "DPI-C" function void dpi_fsgnj(input logic enable, input int a, input int b, output int result);
import "DPI-C" function void dpi_fsgnjn(input logic enable, input int a, input int b, output int result);
import "DPI-C" function void dpi_fsgnjx(input logic enable, input int a, input int b, output int result);
import "DPI-C" function void dpi_flt(input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fle(input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_feq(input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmin(input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmax(input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_flt(input logic enable, input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fle(input logic enable, input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_feq(input logic enable, input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmin(input logic enable, input int a, input int b, output int result, output bit[4:0] fflags);
import "DPI-C" function void dpi_fmax(input logic enable, input int a, input int b, output int result, output bit[4:0] fflags);
`endif

26
hw/dpi/util_dpi.cpp
View File

@@ -9,8 +9,8 @@
#include "VX_config.h"
extern "C" {
void dpi_imul(int a, int b, bool is_signed_a, bool is_signed_b, int* resultl, int* resulth);
void dpi_idiv(int a, int b, bool is_signed, int* quotient, int* remainder);
void dpi_imul(bool enable, int a, int b, bool is_signed_a, bool is_signed_b, int* resultl, int* resulth);
void dpi_idiv(bool enable, int a, int b, bool is_signed, int* quotient, int* remainder);
int dpi_register();
void dpi_assert(int inst, bool cond, int delay);
@@ -93,15 +93,18 @@ void dpi_assert(int inst, bool cond, int delay) {
}
}
void dpi_imul(int a, int b, bool is_signed_a, bool is_signed_b, int* resultl, int* resulth) {
uint64_t first = a;
uint64_t second = b;
void dpi_imul(bool enable, int a, int b, bool is_signed_a, bool is_signed_b, int* resultl, int* resulth) {
if (!enable)
return;
if (is_signed_a && (a & 0x80000000)) {
uint64_t first = *(uint32_t*)&a;
uint64_t second = *(uint32_t*)&b;
if (is_signed_a && (first & 0x80000000)) {
first |= 0xFFFFFFFF00000000;
}
if (is_signed_b && (b & 0x80000000)) {
if (is_signed_b && (second & 0x80000000)) {
second |= 0xFFFFFFFF00000000;
}
@@ -116,9 +119,12 @@ void dpi_imul(int a, int b, bool is_signed_a, bool is_signed_b, int* resultl, in
*resulth = (result >> 32) & 0xFFFFFFFF;
}
void dpi_idiv(int a, int b, bool is_signed, int* quotient, int* remainder) {
uint32_t dividen = a;
uint32_t divisor = b;
void dpi_idiv(bool enable, int a, int b, bool is_signed, int* quotient, int* remainder) {
if (!enable)
return;
uint32_t dividen = *(uint32_t*)&a;
uint32_t divisor = *(uint32_t*)&b;
if (is_signed) {
if (b == 0) {

4
hw/dpi/util_dpi.vh
View File

@@ -1,8 +1,8 @@
`ifndef UTIL_DPI
`define UTIL_DPI
import "DPI-C" function void dpi_imul(input int a, input int b, input logic is_signed_a, input logic is_signed_b, output int resultl, output int resulth);
import "DPI-C" function void dpi_idiv(input int a, input int b, input logic is_signed, output int quotient, output int remainder);
import "DPI-C" function void dpi_imul(input logic enable, input int a, input int b, input logic is_signed_a, input logic is_signed_b, output int resultl, output int resulth);
import "DPI-C" function void dpi_idiv(input logic enable, input int a, input int b, input logic is_signed, output int quotient, output int remainder);
import "DPI-C" function int dpi_register();
import "DPI-C" function void dpi_assert(int inst, input logic cond, input int delay);