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pan/bi: Add a printing helper for pan_varying_layout

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This is just something I had to type again and again to figure out
layout bugs, maybe it's better to just write it once and leave it
disabled by default. Right now it's not printing nir_alu_type since the
printing functions are private in nir_print.c and I don't want to expose
that.

Signed-off-by: Lorenzo Rossi <lorenzo.rossi@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
This commit is contained in:
Lorenzo Rossi 2026-05-04 15:24:22 +02:00
parent 084417fd9d
commit ac339e6ace
1 changed files with 51 additions and 0 deletions
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51
src/panfrost/compiler/pan_nir_collect_varyings.c
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@ -9,6 +9,8 @@
#include "pan_nir.h"
#include "panfrost/model/pan_model.h"
#define DEBUG_PRINT false
enum pipe_format
pan_varying_format(nir_alu_type t, unsigned ncomps)
{
@ -47,6 +49,49 @@ pan_varying_format(nir_alu_type t, unsigned ncomps)
UNREACHABLE("Invalid type");
}
static void
pan_print_varying_layout(FILE *f, nir_shader *s,
const struct pan_varying_layout *layout)
{
const char *section_name[] = {
"POSITION",
"ATTRIBS",
"SPECIAL",
"GENERIC"
};
fprintf(f, "Layout for %s (%s):\n", s->info.name,
mesa_shader_stage_name(s->info.stage));
fprintf(f, "Known:");
if (layout->known == 0) {
fprintf(f, " empty");
} else {
if (layout->known & PAN_VARYING_FORMAT_KNOWN)
fprintf(f, " format");
if (layout->known & PAN_VARYING_LAYOUT_KNOWN)
fprintf(f, " layout");
}
fprintf(f, "\n");
fprintf(f, "Varying count: %d\n", layout->count);
if (layout->known & PAN_VARYING_LAYOUT_KNOWN)
fprintf(f, "Generic size (bytes): %x\n", layout->generic_size_B);
for (unsigned i = 0; i < layout->count; i++) {
const struct pan_varying_slot *slot =
pan_varying_layout_slot_at(layout, i);
if (slot == NULL)
continue;
const char *loc_name =
gl_varying_slot_name_for_stage(slot->location, s->info.stage);
fprintf(f, "%02d: %s alu=%x comps=%d", i, loc_name, slot->alu_type,
slot->ncomps);
if (layout->known & PAN_VARYING_LAYOUT_KNOWN)
fprintf(f, " off=%x section=%s", slot->offset,
section_name[slot->section]);
fprintf(f, "\n");
}
}
struct slot_info {
nir_alu_type type;
bool any_highp;
@ -359,6 +404,9 @@ pan_varying_collect_formats(struct pan_varying_layout *layout, nir_shader *nir,
layout->count = count;
layout->generic_size_B = 0;
layout->known |= PAN_VARYING_FORMAT_KNOWN;
if (DEBUG_PRINT)
pan_print_varying_layout(stderr, nir, layout);
}
void
@ -394,4 +442,7 @@ pan_build_varying_layout_compact(struct pan_varying_layout *layout,
}
layout->generic_size_B = generic_size_B;
layout->known |= PAN_VARYING_LAYOUT_KNOWN;
if (DEBUG_PRINT)
pan_print_varying_layout(stderr, nir, layout);
}