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more reviewing, thinking about atom bundles...

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ed
2026-08-16 01:22:53 -04:00
parent 1a0d417649
commit 3faccfc283
7 changed files with 242 additions and 238 deletions
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code/duffle/gte.atom.c
+12 -4
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@@ -236,8 +236,13 @@ internal S2 const gte_normalize_sqr_tbl[192] align_(2) = {
0x0820, 0x081c, 0x0818, 0x0814, 0x0810, 0x080c, 0x0808, 0x0804,
};
typedef Struct_(RegUse_normalize_v3s4_proc) {
Reg const scratch; // Scratch base carrier.
typedef Struct_(Binds_build_normalize_v3s4) {
U4 scratch;
U2 src_offset;
U2 dst_offset;
};
typedef Struct_(RegUse_build_normalize_v3s4) {
Reg scratch;
Reg src_ptr;
Reg dst_ptr;
Reg recip_est; // |v|² sum + shift-input + sqrtbl[index]
@@ -278,9 +283,12 @@ typedef Struct_(RegUse_normalize_v3s4_proc) {
* Sqrtbl: hardcoded to 0x800185B4 (libgte msc02.rel.data). Note: swapped to local.
* Pipeline: clobbers IR0..3, MAC1..3, LZCS, LZCR.
*/
internal MipsAtom* normalize_v3s4_proc(AtomArena_R aa, U2 src_offset, U2 dst_offset, RegUse_normalize_v3s4_proc r)
internal MipsAtom* build_normalize_v3s4(AtomArena_R aa, U2 src_offset, U2 dst_offset, RegUse_build_normalize_v3s4 r)
MipsAtom_Proc_(aa, {
add_si(r.src_ptr, r.scratch, src_offset), /* r_src_ptr = &src */
// load_word(r.scratch, R_TapePtr, O_(Binds_build_normalize_v3s4,scratch)),
// add_ui_self(R_TapePtr, S_(Binds_build_normalize_v3s4)),
add_si(r.src_ptr, r.scratch, src_offset), /* r_src_ptr = &src */
/* Load src.x/y/z from r_src_ptr (caller-determined address) into r_tmp/r_recip_est/r_branch_tmp.
* r.rt1_src_x holds src.x throughout stages 1-2 — r_mac2_scratch is clobbered to MAC2 in stage 1.5 (line below). */