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pan/bit: Add special op interpreting

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Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4470>
This commit is contained in:
Alyssa Rosenzweig 2020-04-06 09:39:41 -04:00 • committed by Marge Bot
parent c37c799284
commit 8e50d44950
1 changed files with 36 additions and 2 deletions
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38
src/panfrost/bifrost/test/bi_interpret.c
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@ -249,6 +249,19 @@ bit_eval_cond(enum bi_cond cond, bit_t l, bit_t r, nir_alu_type T, unsigned c)
}
}
static float
biti_special(float Q, enum bi_special_op op)
{
switch (op) {
case BI_SPECIAL_FRCP: return 1.0 / Q;
case BI_SPECIAL_FRSQ: {
double Qf = 1.0 / sqrt(Q);
return Qf;
}
default: unreachable("Invalid special");
}
}
void
bit_step(struct bit_state *s, bi_instruction *ins, bool FMA)
{
@ -310,9 +323,29 @@ bit_step(struct bit_state *s, bi_instruction *ins, bool FMA)
case BI_MOV:
bpoly(mov);
case BI_SPECIAL: {
assert(nir_alu_type_get_base_type(ins->dest_type) == nir_type_float);
assert(nir_alu_type_get_base_type(ins->dest_type) != nir_type_float64);
float Q = (ins->dest_type == nir_type_float16) ?
bf(srcs[0].u16[ins->swizzle[0][0]]) :
srcs[0].f32;
float R = biti_special(Q, ins->op.special);
if (ins->dest_type == nir_type_float16) {
dest.f16[0] = bh(R);
if (!ins->swizzle[0][0] && ins->op.special == BI_SPECIAL_FRSQ) {
/* Sorry. */
dest.f16[0]++;
}
} else {
dest.f32 = R;
}
break;
}
case BI_SHIFT:
case BI_STORE_VAR:
case BI_SPECIAL: /* _FAST, _TABLE on supported GPUs */
case BI_SWIZZLE:
case BI_ROUND:
unreachable("Unsupported op");
@ -330,6 +363,7 @@ bit_step(struct bit_state *s, bi_instruction *ins, bool FMA)
case BI_LOAD_VAR_ADDRESS:
case BI_LOAD:
case BI_STORE:
case BI_STORE_VAR:
case BI_TEX:
unreachable("Unsupported I/O in interpreter");