mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-02-24 15:12:23 +01:00
4e2eb23835
byuu says: Changelog: - added Cocoa target: higan can now be compiled for OS X Lion [Cydrak, byuu] - SNES/accuracy profile hires color blending improvements - fixes Marvelous text [AWJ] - fixed a slight bug in SNES/SA-1 VBR support caused by a typo - added support for multi-pass shaders that can load external textures (requires OpenGL 3.2+) - added game library path (used by ananke->Import Game) to Settings->Advanced - system profiles, shaders and cheats database can be stored in "all users" shared folders now (eg /usr/share on Linux) - all configuration files are in BML format now, instead of XML (much easier to read and edit this way) - main window supports drag-and-drop of game folders (but not game files / ZIP archives) - audio buffer clears when entering a modal loop on Windows (prevents audio repetition with DirectSound driver) - a substantial amount of code clean-up (probably the biggest refactoring to date) One highly desired target for this release was to default to the optimal drivers instead of the safest drivers, but because AMD drivers don't seem to like my OpenGL 3.2 driver, I've decided to postpone that. AMD has too big a market share. Hopefully with v093 officially released, we can get some public input on what AMD doesn't like.
99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
bool ARM::condition(uint4 condition) {
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switch(condition) {
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case 0: return cpsr().z == 1; //EQ (equal)
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case 1: return cpsr().z == 0; //NE (not equal)
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case 2: return cpsr().c == 1; //CS (carry set)
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case 3: return cpsr().c == 0; //CC (carry clear)
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case 4: return cpsr().n == 1; //MI (negative)
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case 5: return cpsr().n == 0; //PL (positive)
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case 6: return cpsr().v == 1; //VS (overflow)
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case 7: return cpsr().v == 0; //VC (no overflow)
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case 8: return cpsr().c == 1 && cpsr().z == 0; //HI (unsigned higher)
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case 9: return cpsr().c == 0 || cpsr().z == 1; //LS (unsigned lower or same)
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case 10: return cpsr().n == cpsr().v; //GE (signed greater than or equal)
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case 11: return cpsr().n != cpsr().v; //LT (signed less than)
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case 12: return cpsr().z == 0 && cpsr().n == cpsr().v; //GT (signed greater than)
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case 13: return cpsr().z == 1 || cpsr().n != cpsr().v; //LE (signed less than or equal)
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case 14: return true; //AL (always)
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case 15: return false; //NV (never)
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}
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}
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uint32 ARM::bit(uint32 result) {
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if(cpsr().t || instruction() & (1 << 20)) {
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cpsr().n = result >> 31;
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cpsr().z = result == 0;
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cpsr().c = carryout();
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}
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return result;
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}
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uint32 ARM::add(uint32 source, uint32 modify, bool carry) {
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uint32 result = source + modify + carry;
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if(cpsr().t || instruction() & (1 << 20)) {
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uint32 overflow = ~(source ^ modify) & (source ^ result);
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cpsr().n = result >> 31;
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cpsr().z = result == 0;
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cpsr().c = (1u << 31) & (overflow ^ source ^ modify ^ result);
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cpsr().v = (1u << 31) & (overflow);
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}
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return result;
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}
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uint32 ARM::sub(uint32 source, uint32 modify, bool carry) {
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return add(source, ~modify, carry);
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}
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uint32 ARM::mul(uint32 product, uint32 multiplicand, uint32 multiplier) {
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product += multiplicand * multiplier;
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if(cpsr().t || instruction() & (1 << 20)) {
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cpsr().n = product >> 31;
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cpsr().z = product == 0;
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}
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return product;
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}
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uint32 ARM::lsl(uint32 source, uint8 shift) {
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carryout() = cpsr().c;
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if(shift == 0) return source;
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carryout() = shift > 32 ? 0 : source & (1 << 32 - shift);
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source = shift > 31 ? 0 : source << shift;
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return source;
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}
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uint32 ARM::lsr(uint32 source, uint8 shift) {
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carryout() = cpsr().c;
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if(shift == 0) return source;
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carryout() = shift > 32 ? 0 : source & (1 << shift - 1);
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source = shift > 31 ? 0 : source >> shift;
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return source;
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}
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uint32 ARM::asr(uint32 source, uint8 shift) {
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carryout() = cpsr().c;
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if(shift == 0) return source;
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carryout() = shift > 32 ? source & (1 << 31) : source & (1 << shift - 1);
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source = shift > 31 ? (int32)source >> 31 : (int32)source >> shift;
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return source;
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}
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uint32 ARM::ror(uint32 source, uint8 shift) {
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carryout() = cpsr().c;
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if(shift == 0) return source;
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if(shift &= 31)
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source = source << 32 - shift | source >> shift;
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carryout() = source & (1 << 31);
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return source;
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}
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uint32 ARM::rrx(uint32 source) {
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carryout() = source & 1;
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return (cpsr().c << 31) | (source >> 1);
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}
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