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Dont use 256 bit code paths on ARM

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ARM only has 128 bit registers. simde simulates 256 bit operations using
them, which is fairly pointless for us.
This commit is contained in:
Kovid Goyal
2024-01-22 13:58:17 +05:30
parent 23a4012aeb
commit 76c6630084
1 changed files with 4 additions and 2 deletions
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6
kitty/simd-string.c
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@@ -124,7 +124,8 @@ init_simd(void *x) {
#ifdef __APPLE__
#ifdef __arm64__
// simde takes care of NEON on Apple Silicon
has_sse4_2 = true; has_avx2 = true;
// ARM has only 128 bit registers.
has_sse4_2 = true; has_avx2 = false;
#else
do_check();
// On GitHub actions there are some weird macOS machines which report avx2 not available but sse4.2 is available and then
@@ -138,7 +139,8 @@ init_simd(void *x) {
#ifdef __aarch64__
// no idea how to probe ARM cpu for NEON support. This file uses pretty
// basic AVX2 and SSE4.2 intrinsics, so hopefully they work on ARM
has_sse4_2 = true; has_avx2 = true;
// ARM has only 128 bit registers.
has_sse4_2 = true; has_avx2 = false;
#else
do_check();
#endif