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feat: add masked-u16 widescreen cull sites

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Add a shared native/interpreter helper for sltiu classifiers operating on ANDI-masked 16-bit screen X values, preserving MIPS immediate sign extension and overlay linkage.

Co-authored-by: Opok <novelasevilliousesp@gmail.com>
This commit is contained in:
Matthew Stanley
2026-07-19 23:25:15 -07:00
parent 8ba7f4efe6
commit 288926111f
12 changed files with 85 additions and 3 deletions
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recompiler/src/code_generator.cpp
+15
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@@ -834,6 +834,20 @@ std::string CodeGenerator::translate_instruction(uint32_t addr, uint32_t instr)
}
// overlay variant: addr is different code here — fall through to vanilla.
}
if (config_.ws_cull_vxrange_sites.count(addr)) {
if (opcode == 0x0B) { // sltiu
uint32_t rs = get_rs(instr), rt = get_rt(instr);
uint16_t imm = get_imm16_u(instr);
return fmt::format("{} = psx_ws_cull_vxrange({}, {});"
" /* ws cull masked-u16 X window */{}",
reg_name(rt), reg_name(rs), (unsigned)imm, comment);
} else if (!config_.overlay_mode) {
fmt::print(stderr, "ERROR: [widescreen.cull] vxrange site 0x{:08X} is not "
"sltiu (opcode 0x{:02X})\n", addr, opcode);
std::exit(1);
}
// Overlay variant at the same address: leave nonmatching code unchanged.
}
if (config_.ws_cull_range_sites.count(addr)) {
if (opcode == 0x0B) { // sltiu
uint32_t rs = get_rs(instr), rt = get_rt(instr);
@@ -2603,6 +2617,7 @@ void CodeGenerator::emit_runtime_externs(std::ostream& ss) const {
ss << "extern int psx_ws_cull_sltiu(uint32_t sx, uint32_t imm); /* ws auto screen-x cull (gpu.c) */\n";
ss << "extern int psx_ws_cull_slti(uint32_t sx, uint32_t imm); /* ws cull signed right edge (gpu.c) */\n";
ss << "extern int psx_ws_cull_bltz(uint32_t v); /* ws cull signed left edge (gpu.c) */\n";
ss << "extern int psx_ws_cull_vxrange(uint32_t x, uint32_t imm); /* ws masked-u16 X window */\n";
ss << "extern int psx_ws_backdrop_x(int x); /* widescreen backdrop screenX squash (gpu.c) */\n";
ss << "extern int psx_ws_bg2d_cols(int base); /* ws 2D bg tile-loop widen: col count (gpu.c) */\n";
ss << "extern int psx_ws_bg2d_startcol(int col, unsigned mask); /* ws 2D bg tile-loop widen: start tile col (gpu.c) */\n";