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nouveau/mme: Add support for MUL on Fermi

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25167>
This commit is contained in:
Faith Ekstrand 2024-07-29 11:21:42 -05:00 • committed by Marge Bot
parent 033cafc9fe
commit cac4da4cab
3 changed files with 70 additions and 0 deletions
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22
src/nouveau/mme/mme_fermi_builder.c
View file

@ -323,6 +323,23 @@ mme_fermi_bfe_to(struct mme_builder *b, struct mme_value dst,
mme_fermi_bfe(fb, dst, pos, x, mme_zero(), bits);
}
void
mme_fermi_umul_32x32_32_to_free_srcs(struct mme_builder *b,
struct mme_value dst,
struct mme_value x,
struct mme_value y)
{
mme_while (b, ine, x, mme_zero()) {
struct mme_value lsb = mme_and(b, x, mme_imm(1));
mme_if (b, ine, lsb, mme_zero()) {
mme_add_to(b, dst, dst, y);
}
mme_free_reg(b, lsb);
mme_srl_to(b, x, x, mme_imm(1u));
mme_sll_to(b, y, y, mme_imm(1u));
}
}
static struct mme_value
mme_fermi_load_imm_to_reg(struct mme_builder *b, struct mme_value data)
{
@ -685,6 +702,11 @@ mme_fermi_alu_to(struct mme_builder *b,
return;
}
break;
case MME_ALU_OP_MUL:
x = mme_mov(b, x);
y = mme_mov(b, y);
mme_fermi_umul_32x32_32_to_free_srcs(b, dst, x, y);
return;
case MME_ALU_OP_SLL:
mme_fermi_sll_to(fb, dst, x, y);
return;

6
src/nouveau/mme/mme_fermi_builder.h
View file

@ -109,6 +109,12 @@ void
mme_fermi_bfe_to(struct mme_builder *b, struct mme_value dst,
struct mme_value x, struct mme_value pos, uint8_t bits);
void
mme_fermi_umul_32x32_32_to_free_srcs(struct mme_builder *b,
struct mme_value dst,
struct mme_value x,
struct mme_value y);
void
mme_fermi_merge_to(struct mme_builder *b, struct mme_value dst,
struct mme_value x, struct mme_value y,

42
src/nouveau/mme/tests/mme_builder_test.cpp
View file

@ -189,6 +189,48 @@ TEST_F(mme_builder_test, sub_imm)
}
}
static const uint32_t mul_cases[] = {
0x00000000,
0x00000001,
0x0000005c,
0x00c0ffee,
0xffffffff,
0x0000ffff,
0x00008000,
0x0001ffff,
0xffff8000,
0x00010000,
0x00020000,
0xfffc0000,
0xfffe0000,
};
TEST_F(mme_builder_test, mul)
{
for (auto sim : sims) {
mme_builder b;
mme_builder_init(&b, sim->devinfo);
mme_value x = mme_load(&b);
mme_value y = mme_load(&b);
sim->mme_store_data(&b, 0, mme_mul(&b, x, y));
auto macro = mme_builder_finish_vec(&b);
for (uint32_t i = 0; i < ARRAY_SIZE(mul_cases); i++) {
for (uint32_t j = 0; j < ARRAY_SIZE(mul_cases); j++) {
std::vector<uint32_t> params;
params.push_back(mul_cases[i]);
params.push_back(mul_cases[j]);
sim->run_macro(macro, params);
ASSERT_EQ(sim->data[0], mul_cases[i] * mul_cases[j]);
}
}
}
}
TEST_F(mme_builder_test, sll_srl)
{
static const uint32_t x = 0xac406fe1;