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unreachable fun

This commit is contained in:
Lior Halphon 2022-01-03 17:17:35 +02:00
parent cd16431699
commit 5c17c0ec3b
7 changed files with 20 additions and 9 deletions
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7
Core/apu.c
View File

@ -40,6 +40,8 @@ bool GB_apu_is_DAC_enabled(GB_gameboy_t *gb, unsigned index)
case GB_NOISE: case GB_NOISE:
return gb->io_registers[GB_IO_NR42] & 0xF8; return gb->io_registers[GB_IO_NR42] & 0xF8;
nodefault;
} }
return false; return false;
@ -58,6 +60,8 @@ static uint8_t agb_bias_for_channel(GB_gameboy_t *gb, unsigned index)
return 0; return 0;
case GB_NOISE: case GB_NOISE:
return gb->apu.noise_channel.current_volume; return gb->apu.noise_channel.current_volume;
nodefault;
} }
return 0; return 0;
} }
@ -257,7 +261,8 @@ static void render(GB_gameboy_t *gb)
{left_volume * (1 - gb->apu_output.highpass_rate) + gb->apu_output.highpass_diff.left * gb->apu_output.highpass_rate, {left_volume * (1 - gb->apu_output.highpass_rate) + gb->apu_output.highpass_diff.left * gb->apu_output.highpass_rate,
right_volume * (1 - gb->apu_output.highpass_rate) + gb->apu_output.highpass_diff.right * gb->apu_output.highpass_rate}; right_volume * (1 - gb->apu_output.highpass_rate) + gb->apu_output.highpass_diff.right * gb->apu_output.highpass_rate};
case GB_HIGHPASS_MAX:; case GB_HIGHPASS_MAX:
nodefault;
} }
} }

3
Core/defs.h
View File

@ -17,6 +17,9 @@
#define unrolled #define unrolled
#endif #endif
#define unreachable() __builtin_unreachable();
#define nodefault default: unreachable()
#ifdef GB_BIG_ENDIAN #ifdef GB_BIG_ENDIAN
#define LE16(x) __builtin_bswap16(x) #define LE16(x) __builtin_bswap16(x)
#define LE32(x) __builtin_bswap32(x) #define LE32(x) __builtin_bswap32(x)

2
Core/display.c
View File

@ -834,6 +834,8 @@ static void advance_fetcher_state_machine(GB_gameboy_t *gb)
gb->fetcher_state++; gb->fetcher_state++;
} }
break; break;
nodefault;
} }
} }

4
Core/joypad.c
View File

@ -53,9 +53,7 @@ void GB_update_joyp(GB_gameboy_t *gb)
} }
break; break;
default: nodefault;
__builtin_unreachable();
break;
} }
/* Todo: This assumes the keys *always* bounce, which is incorrect when emulating an SGB */ /* Todo: This assumes the keys *always* bounce, which is incorrect when emulating an SGB */

2
Core/mbc.c
View File

@ -77,6 +77,7 @@ void GB_update_mbc_mappings(GB_gameboy_t *gb)
gb->mbc_rom_bank++; gb->mbc_rom_bank++;
} }
break; break;
nodefault;
} }
break; break;
case GB_MBC2: case GB_MBC2:
@ -121,6 +122,7 @@ void GB_update_mbc_mappings(GB_gameboy_t *gb)
gb->mbc_ram_bank = gb->tpp1.ram_bank; gb->mbc_ram_bank = gb->tpp1.ram_bank;
gb->mbc_ram_enable = (gb->tpp1.mode == 2) || (gb->tpp1.mode == 3); gb->mbc_ram_enable = (gb->tpp1.mode == 2) || (gb->tpp1.mode == 3);
break; break;
nodefault;
} }
} }

9
Core/memory.c
View File

@ -360,6 +360,7 @@ static uint8_t read_mbc_ram(GB_gameboy_t *gb, uint16_t addr)
case 1: return gb->tpp1.rom_bank >> 8; case 1: return gb->tpp1.rom_bank >> 8;
case 2: return gb->tpp1.ram_bank; case 2: return gb->tpp1.ram_bank;
case 3: return gb->rumble_strength | gb->tpp1_mr4; case 3: return gb->rumble_strength | gb->tpp1_mr4;
nodefault;
} }
case 2: case 2:
case 3: case 3:
@ -533,8 +534,7 @@ static uint8_t read_high_memory(GB_gameboy_t *gb, uint16_t addr)
oam[target >> 1] = bitwise_glitch_read(a, b, c); oam[target >> 1] = bitwise_glitch_read(a, b, c);
break; break;
default: nodefault;
__builtin_unreachable();
} }
for (unsigned i = 0; i < 8; i++) { for (unsigned i = 0; i < 8; i++) {
@ -706,7 +706,7 @@ static uint8_t read_high_memory(GB_gameboy_t *gb, uint16_t addr)
} }
return 0xFF; return 0xFF;
} }
__builtin_unreachable(); unreachable();
} }
if (addr == 0xFFFF) { if (addr == 0xFFFF) {
@ -899,6 +899,7 @@ static void write_mbc(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
} }
} }
break; break;
nodefault;
} }
GB_update_mbc_mappings(gb); GB_update_mbc_mappings(gb);
} }
@ -1243,7 +1244,7 @@ static void write_high_memory(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
case GB_MODEL_SGB_PAL_NO_SFC: case GB_MODEL_SGB_PAL_NO_SFC:
case GB_MODEL_SGB2: case GB_MODEL_SGB2:
case GB_MODEL_SGB2_NO_SFC: case GB_MODEL_SGB2_NO_SFC:
__builtin_unreachable(); unreachable();
} }
return; return;
} }

2
Core/sm83_cpu.c
View File

@ -658,8 +658,8 @@ static bool condition_code(GB_gameboy_t *gb, uint8_t opcode)
return !(gb->af & GB_CARRY_FLAG); return !(gb->af & GB_CARRY_FLAG);
case 3: case 3:
return (gb->af & GB_CARRY_FLAG); return (gb->af & GB_CARRY_FLAG);
nodefault;
} }
__builtin_unreachable();
return false; return false;
} }