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nouveau/mme: Add a mul64 helper

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>
This commit is contained in:
Faith Ekstrand
2023-01-30 20:12:02 -06:00
committed by Marge Bot
parent adb880cd29
commit 62bd03a0e7
1 changed files with 32 additions and 0 deletions
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src/nouveau/mme/mme_builder.h
+32
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@@ -158,6 +158,17 @@ mme_imm(uint32_t imm)
return val;
}
static inline bool
mme_is_zero(struct mme_value x)
{
switch (x.type) {
case MME_VALUE_TYPE_ZERO: return true;
case MME_VALUE_TYPE_IMM: return x.imm == 0;
case MME_VALUE_TYPE_REG: return false;
default: unreachable("Invalid MME value type");
}
}
static inline struct mme_value64
mme_value64(struct mme_value lo, struct mme_value hi)
{
@@ -381,6 +392,27 @@ mme_umul_32x32_64(struct mme_builder *b,
mme_value64(y, mme_zero()));
}
static inline struct mme_value64
mme_mul64(struct mme_builder *b,
struct mme_value64 x, struct mme_value64 y)
{
if (mme_is_zero(x.hi) && mme_is_zero(y.hi))
return mme_umul_32x32_64(b, x.lo, y.lo);
struct mme_value64 dst = mme_umul_32x32_64(b, x.lo, y.lo);
struct mme_value tmp = mme_alloc_reg(b);
mme_mul_to(b, tmp, x.lo, y.hi);
mme_add64_to(b, dst, dst, mme_value64(mme_zero(), tmp));
mme_mul_to(b, tmp, x.hi, y.lo);
mme_add64_to(b, dst, dst, mme_value64(mme_zero(), tmp));
mme_free_reg(b, tmp);
return dst;
}
static inline void
mme_merge_to(struct mme_builder *b, struct mme_value dst,
struct mme_value x, struct mme_value y,