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bone_sse: f32 findInterpIdx t division, non-inline sections with quota — 3697 cycles (-6%)

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MarcelineVQ
2026-03-16 14:12:53 -07:00
parent 502fd9ba04
commit 99b4c8b2d0
2 changed files with 34 additions and 37 deletions
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src/bench/main.zig
+10 -10
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@@ -829,7 +829,8 @@ pub fn main() void {
// =========================================================================
{
print("\n{s}\n", .{"-- transform44 (comprehensive fixture) --"});
const T44_ITERS: u64 = 100_000;
const T44_ITERS: u32 = 500_000;
const BASELINE_CYCLES: u64 = 3934; // frozen baseline measurement
const wu = std.mem.writeInt;
const fb = @as(u32, @bitCast(@as(f32, 1.0)));
@@ -1557,19 +1558,18 @@ pub fn main() void {
const pp = @intFromPtr(&pos);
const po = @intFromPtr(&ofs);
const best_baseline = run_bench_fn(transformImpl_BASELINE, so, pm, pp, po, sb, &scene_obj, &anim_ctx_mem, T44_ITERS);
// Only benchmark SSE — baseline is frozen constant
const best_sse = run_bench_fn(transformImpl_SSE, so, pm, pp, po, sb, &scene_obj, &anim_ctx_mem, T44_ITERS);
const avg_base = best_baseline / T44_ITERS;
const avg_sse = best_sse / T44_ITERS;
print(" {d} bones, {d} texAnim, {d} colorAnim, {d} wordAnim, {d} boneKF, {d} ribbon, {d} particle, {d} attach\n", .{ BONE_COUNT, TEX_ANIM_COUNT, COLOR_ANIM_COUNT, WORD_ANIM_COUNT, BKF_COUNT, RIBBON_COUNT, PARTICLE_124_COUNT, ATTACH_COUNT });
print(" BASELINE: {d} cycles/call\n", .{avg_base});
print(" BASELINE: {d} cycles/call (frozen)\n", .{BASELINE_CYCLES});
print(" SSE: {d} cycles/call", .{avg_sse});
if (avg_sse < avg_base) {
print(" ({d}.{d}x faster)\n", .{ avg_base * 10 / avg_sse / 10, (avg_base * 10 / avg_sse) % 10 });
} else if (avg_sse > avg_base) {
print(" ({d}.{d}x slower)\n", .{ avg_sse * 10 / avg_base / 10, (avg_sse * 10 / avg_base) % 10 });
if (avg_sse < BASELINE_CYCLES) {
const pct = (BASELINE_CYCLES - avg_sse) * 100 / BASELINE_CYCLES;
print(" (-{d}%)\n", .{pct});
} else if (avg_sse > BASELINE_CYCLES) {
const pct = (avg_sse - BASELINE_CYCLES) * 100 / BASELINE_CYCLES;
print(" (+{d}%)\n", .{pct});
} else {
print(" (same)\n", .{});
}