diff options
Diffstat (limited to 'games-emulation/bsnes-jg/files/bsnes-jg-1.1.2-strict-aliasing.patch')
-rw-r--r-- | games-emulation/bsnes-jg/files/bsnes-jg-1.1.2-strict-aliasing.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/games-emulation/bsnes-jg/files/bsnes-jg-1.1.2-strict-aliasing.patch b/games-emulation/bsnes-jg/files/bsnes-jg-1.1.2-strict-aliasing.patch new file mode 100644 index 000000000000..106ea27730da --- /dev/null +++ b/games-emulation/bsnes-jg/files/bsnes-jg-1.1.2-strict-aliasing.patch @@ -0,0 +1,67 @@ +https://bugs.gentoo.org/926077 +https://github.com/LIJI32/SameBoy/pull/593 +https://gitlab.com/jgemu/bsnes/-/merge_requests/419 +https://gitlab.com/jgemu/bsnes/-/commit/966545bb79cc9810fbcedbe34fd52f7b9b5ef04e + +From 966545bb79cc9810fbcedbe34fd52f7b9b5ef04e Mon Sep 17 00:00:00 2001 +From: Lior Halphon <LIJI32@gmail.com> +Date: Sat, 9 Mar 2024 11:08:01 -0800 +Subject: [PATCH 1/2] Avoid strict aliasing violations. Closes #593 + +Backported from: + +https://github.com/LIJI32/SameBoy/commit/8739da61c013e20e1cc94f0619c622a65c713408 +--- + deps/gb/apu.c | 4 ++-- + deps/gb/apu.h | 11 +++++++++++ + 2 files changed, 13 insertions(+), 2 deletions(-) + +diff --git a/deps/gb/apu.c b/deps/gb/apu.c +index e621e82a..0f0ed16b 100644 +--- a/deps/gb/apu.c ++++ b/deps/gb/apu.c +@@ -100,7 +100,7 @@ static void update_sample(GB_gameboy_t *gb, GB_channel_t index, int8_t value, un + output.left = output.right = 0; + } + +- if (*(uint32_t *)&(gb->apu_output.current_sample[index]) != *(uint32_t *)&output) { ++ if (gb->apu_output.current_sample[index].packed != output.packed) { + refresh_channel(gb, index, cycles_offset); + gb->apu_output.current_sample[index] = output; + } +@@ -131,7 +131,7 @@ static void update_sample(GB_gameboy_t *gb, GB_channel_t index, int8_t value, un + if (likely(!gb->apu_output.channel_muted[index])) { + output = (GB_sample_t){(0xF - value * 2) * left_volume, (0xF - value * 2) * right_volume}; + } +- if (*(uint32_t *)&(gb->apu_output.current_sample[index]) != *(uint32_t *)&output) { ++ if (gb->apu_output.current_sample[index].packed != output.packed) { + refresh_channel(gb, index, cycles_offset); + gb->apu_output.current_sample[index] = output; + } +diff --git a/deps/gb/apu.h b/deps/gb/apu.h +index c8700c80..15b54a87 100644 +--- a/deps/gb/apu.h ++++ b/deps/gb/apu.h +@@ -25,11 +25,22 @@ + + /* APU ticks are 2MHz, triggered by an internal APU clock. */ + ++#ifdef GB_INTERNAL ++typedef union ++{ ++ struct { ++ int16_t left; ++ int16_t right; ++ }; ++ uint32_t packed; ++} GB_sample_t; ++#else + typedef struct + { + int16_t left; + int16_t right; + } GB_sample_t; ++#endif + + typedef struct + { |