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Fix MUL

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This commit is contained in:
Shashank Holla 2023-04-01 13:13:42 -04:00 • committed by Blaise Tine
parent 8c059173ba
commit 49ff848f3d
1 changed files with 27 additions and 3 deletions
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30
hw/dpi/util_dpi.cpp
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@ -99,14 +99,38 @@ void dpi_assert(int inst, bool cond, int delay) {
///////////////////////////////////////////////////////////////////////////////
void umul64wide (uint64_t a, uint64_t b, uint64_t *hi, uint64_t *lo)
{
uint64_t a_lo = (uint64_t)(uint32_t)a;
uint64_t a_hi = a >> 32;
uint64_t b_lo = (uint64_t)(uint32_t)b;
uint64_t b_hi = b >> 32;
uint64_t p0 = a_lo * b_lo;
uint64_t p1 = a_lo * b_hi;
uint64_t p2 = a_hi * b_lo;
uint64_t p3 = a_hi * b_hi;
uint32_t cy = (uint32_t)(((p0 >> 32) + (uint32_t)p1 + (uint32_t)p2) >> 32);
*lo = p0 + (p1 << 32) + (p2 << 32);
*hi = p3 + (p1 >> 32) + (p2 >> 32) + cy;
}
void dpi_imul(bool enable, long int a, long int b, bool is_signed_a, bool is_signed_b, long int* resultl, long int* resulth) {
if (!enable)
return;
uint64_t first = *(long int*)&a;
uint64_t second = *(long int*)&b;
umul64wide (a, b, (uint64_t *)resulth, (uint64_t *)resultl);
if (is_signed_a && (first & 0x80000000)) {
//if (a < 0LL) *resulth -= b;
//if (b < 0LL) *resultl -= a;
dpi_trace(1, "MUL - %lld %lld %lld %lld\n", a, b, *resulth, *resultl);
/*if (is_signed_a && (first & 0x80000000)) {
first |= 0xFFFFFFFF00000000;
}
@ -122,7 +146,7 @@ void dpi_imul(bool enable, long int a, long int b, bool is_signed_a, bool is_sig
}
*resultl = result & 0xFFFFFFFF;
*resulth = (result >> 32) & 0xFFFFFFFF;
*resulth = (result >> 32) & 0xFFFFFFFF;*/
}
void dpi_idiv(bool enable, long int a, long int b, bool is_signed, long int* quotient, long int* remainder) {
@ -173,4 +197,4 @@ void dpi_trace_start() {
void dpi_trace_stop() {
sim_trace_enable(false);
}
}