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reducing cross product atom procs to a single one in gte for once.

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ed
2026-08-17 01:05:58 -04:00
parent 18b1d5a04b
commit e79c364b40
8 changed files with 128 additions and 186 deletions
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code/hello_camera/hello_camera.c
+41 -29
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@@ -186,21 +186,16 @@ internal void compile_resolve_look_at(void) {
});
regfile_reset_to_mask(& rf, pin_mask);
/* === ATOM 2: cross uz×up_in→right === */
// smem.resolve_look_at_bundle[2] = AtomBundleEntry_(resolve_look_at,cross_uz_up_to_right)(& ab,
smem.resolve_look_at_bundle[2] = resolve_look_at_cross_uz_up_into_right(& ab,
RegUse_(resolve_look_at_cross_uz_up_into_right) {
.scratch = R_ResolveScratch,
.a = ralloc(),
.b = ralloc(),
.c = ralloc(),
.d = ralloc(),
.f = ralloc(),
/* === ATOM 2: cross uz×up_in→right (Binds_gte_cross_v3s4) === */
smem.resolve_look_at_bundle[2] = gte_cross_v3s4(& ab,
RegUse_(gte_cross_v3s4) {
.a = ralloc_v3(),
.b = ralloc_v3(),
.t0 = ralloc(),
.t1 = ralloc(),
.t2 = ralloc(),
.t0 = ralloc(),
});
regfile_reset_to_mask(& rf, pin_mask);
regfile_reset_to_mask(& rf, pin_mask);
/* === ATOM 3: normalize right→ux === */
src_offset = O_(ResolveLookAtScratch, right);
@@ -220,17 +215,16 @@ internal void compile_resolve_look_at(void) {
});
regfile_reset_to_mask(& rf, pin_mask);
/* === ATOM 4: cross uz×ux→up === */
smem.resolve_look_at_bundle[4] = resolve_look_at__cross_uz_ux_to_up_proc(& ab,
RegUse_(resolve_look_at__cross_uz_ux_to_up_proc){
.scratch = R_ResolveScratch,
.a = ralloc_v3(), /* T0 T1 T2 */
.b = ralloc_v3(), /* T3 T5 T6 */
.t0 = ralloc(), /* T7 = up */
.t1 = ralloc(), /* V0 = uz / rt11 */
.t2 = ralloc(), /* V1 = ux / rt22 */
/* === ATOM 4: cross uz×ux→up (Binds_gte_cross_v3s4) === */
smem.resolve_look_at_bundle[4] = gte_cross_v3s4(& ab,
RegUse_(gte_cross_v3s4) {
.a = ralloc_v3(),
.b = ralloc_v3(),
.t0 = ralloc(),
.t1 = ralloc(),
.t2 = ralloc(),
});
regfile_reset_to_mask(& rf, pin_mask);
regfile_reset_to_mask(& rf, pin_mask);
/* === ATOM 5: normalize up→uy === */
src_offset = O_(ResolveLookAtScratch, up);
@@ -280,8 +274,13 @@ internal void compile_resolve_look_at(void) {
U4 r_scratch_6c = R_ResolveScratch;
U4 r_off_ptr_6c = R_T1; /* &scratch.eye (= off dst) */
U4 r_tmp0_6c = R_T2;
smem.resolve_look_at_bundle[9] = resolve_look_at__trans_matrix_proc(& ab,
r_look_at_6c, r_scratch_6c, r_off_ptr_6c, r_tmp0_6c, R_T3, R_T4);
smem.resolve_look_at_bundle[9] = AtomBundleEntry_(resolve_look_at,trans_matrix)(& ab,
r_look_at_6c,
r_scratch_6c,
r_off_ptr_6c,
r_tmp0_6c,
R_T3,
R_T4);
/* Sanity check: arena didn't overflow. */
assert(ab.used <= ResolveLookAtArena_Size);
@@ -295,6 +294,9 @@ I_ void resolve_look_at(TapeBuilder_R tb
, P3_S4* target
, V3_S4* up_in
){
/* Typed view of the scratchpad for field-address arithmetic. */
ResolveLookAtScratch* sp = C_scratch(ResolveLookAtScratch*);
tb_emit(tb, smem.resolve_look_at_bundle[0]); {
tb_data(tb, u4_(target));
tb_data(tb, u4_(eye));
@@ -302,15 +304,25 @@ I_ void resolve_look_at(TapeBuilder_R tb
tb_data(tb, u4_(smem.scratchpad));
}
tb_emit(tb, smem.resolve_look_at_bundle[1]); {
tb_emit(tb, smem.resolve_look_at_bundle[1]); {
// tb_data(tb, u4_(Scratchpad_Loc));
}
tb_emit(tb, smem.resolve_look_at_bundle[2]); { }
tb_emit(tb, smem.resolve_look_at_bundle[3]); {
tb_emit(tb, smem.resolve_look_at_bundle[2]); {
/* Binds_gte_cross_v3s4: src_a, src_b, out (3 pointers). */
tb_data(tb, u4_(& sp->uz)); /* src_a */
tb_data(tb, u4_(& sp->up_in)); /* src_b */
tb_data(tb, u4_(& sp->right)); /* out */
}
tb_emit(tb, smem.resolve_look_at_bundle[3]); {
// tb_data(tb, u4_(Scratchpad_Loc));
}
tb_emit(tb, smem.resolve_look_at_bundle[4]); { }
tb_emit(tb, smem.resolve_look_at_bundle[5]); {
tb_emit(tb, smem.resolve_look_at_bundle[4]); {
/* Binds_gte_cross_v3s4: src_a, src_b, out (3 pointers). */
tb_data(tb, u4_(& sp->uz)); /* src_a */
tb_data(tb, u4_(& sp->ux)); /* src_b */
tb_data(tb, u4_(& sp->up)); /* out */
}
tb_emit(tb, smem.resolve_look_at_bundle[5]); {
// tb_data(tb, u4_(Scratchpad_Loc));
}