Fixes for LoongArch LSX + fast math#1391
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mr-c merged 15 commits intosimd-everywhere:masterfrom Feb 22, 2026
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__lsx_vftintrz_w_d accepts two __m128d arguments, so it's
should be called with zero_f64 that is declared.
This fixes the following compilation error that I get when
compiling current simde master for loongarch64-linux-gnu
with gcc 14.3.1 and `-Ofast -mlsx -mlasx` in CFLAGS:
../test/x86/avx512/../../../simde/x86/sse2.h: In function ‘simde__m128i simde_mm_cvttpd_epi32(simde__m128d)’:
../test/x86/avx512/../../../simde/x86/sse2.h:3736:39: error: ‘zero_i64’ was not declared in this scope; did you mean ‘zero_f64’?
3736 | r_.lsx_i64 = __lsx_vftintrz_w_d(zero_i64, simde__m128d_to_private(a).lsx_f64);
| ^~~~~~~~
| zero_f64
Signed-off-by: Ivan A. Melnikov <iv@altlinux.org>
Similarly to what other architectures do, __lsx_vftintrz_w_s should be used when both SIMDE_FAST_CONVERSION_RANGE and SIMDE_FAST_NANS are declared, not just stored to a temporary and lost. Signed-off-by: Ivan A. Melnikov <iv@altlinux.org>
__lsx_vftintrne_w_s actually returns a vector of 4 ints, but lsxintrin.h from gcc 14 and 15 declares it as returning a vector of 2 longs. We use HEDLEY_REINTERPRET_CAST to work this around. See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123759
__lsx_vfcmp_cun_s actually retuns a vector of 4 ints, but lsxintrin.h from GCC 14 and 15 declares it as returning two longs. Use HEDLEY_REINTERPRET_CAST to work this around and assign the correct member of simde__m128_private. See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123759
Change from SIMD_LOONGARCH_LSX_NATIVE to SIMDE_LOONGARCH_LSX_NATIVE.
…4.04 To avoid binutils mismatch
This works around two similar instances of ICE of GCC 14:
test/x86/avx512/range.cpp: In function ‘int test_simde_mm256_maskz_range_ps()’:
test/x86/avx512/range.cpp:702:1: error: unrecognizable insn:
702 | }
| ^
(insn 191 190 192 2 (set (reg:V8SF 446 [ r_$f32_514 ])
(vec_merge:V8SF (vec_duplicate:V8SF (const_double:SF 0.0 [0x0.0p+0]))
(reg:V8SF 446 [ r_$f32_514 ])
(const_int 1 [0x1]))) "../test/x86/avx512/../../../simde/x86/avx.h":1041:17 -1
(nil))
[...]
The similar workaround is already present in simde_mm256_set_ps.
Link: https://gcc.gnu.org/pipermail/gcc-patches/2026-January/706166.html
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117575
…arch64 Avoid some usages of __lsx_vst and __lasx_xvst, as they may cause maybe-uninitialized warnings to be triggered: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123766 The optimizing compiler still generates optimal vectorized code for fixed-size __builtin_memcpy, so no performance loss is expected.
... in the same way it's already done for RISC-V GCC. Co-authored-by: Michael R. Crusoe <crusoe@debian.org>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121064 has been fixed in the gcc-14 branch, and already released in gcc 15.2 Co-authored-by: Michael R. Crusoe <crusoe@debian.org>
Use simde_memcpy instead of direct assignment to prevent GCC from generating incorrect vshuf.w instructions on LoongArch with -Ofast. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121064
With -ffinite-math-only (implied by -ffast-math/-Ofast), Clang optimize away comparisons involving infinity, causing test assertions to fail. Skip the affected test cases when SIMDE_FAST_MATH is defined.
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A subset of #1369 , so we can merge the major fixes