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Added float4x4_inverse test. (#391)

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* Added float4x4_inverse test.

* Bump tolerance.

* Fixed broadcast bug in simd128_f32_dot_ni.
This commit is contained in:
Branimir Karadžić
2026-05-06 22:15:03 -07:00
committed by GitHub
parent c8f135d579
commit 6bb55b32eb
2 changed files with 48 additions and 2 deletions
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4
include/bx/inline/simd_ni.inl
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@@ -419,8 +419,8 @@ namespace bx
const Ty xyzw = simd_f32_mul(_a, _b);
const Ty zwxy = simd128_x32_swiz_zwxy(xyzw);
const Ty tmp0 = simd_f32_add(xyzw, zwxy);
const Ty yyyy = simd128_x32_swiz_yyyy(tmp0);
const Ty result = simd_f32_add(tmp0, yyyy);
const Ty yxwz = simd128_x32_swiz_yxwz(tmp0);
const Ty result = simd_f32_add(tmp0, yxwz);
return result;
}

46
tests/float4x4_test.cpp Normal file
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@@ -0,0 +1,46 @@
/*
* Copyright 2010-2026 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bx/blob/master/LICENSE
*/
#include "test.h"
#include <bx/float4x4_t.h>
#include <bx/math.h>
#include <bx/string.h>
TEST_CASE("float4x4_inverse", "[float4x4]")
{
const float src[] =
{
1.20629f, 0.0f, 0.0f, 0.0f,
0.0f, 2.14451f, 0.0f, 0.0f,
0.0f, 0.0f, -1.00001f, -1.0f,
0.0f, 0.0f, -2.00001f, 0.0f,
};
static_assert(BX_COUNTOF(src) == 16);
bx::float4x4_t mtx;
mtx.col[0] = bx::simd128_ld(src[ 0], src[ 1], src[ 2], src[ 3]);
mtx.col[1] = bx::simd128_ld(src[ 4], src[ 5], src[ 6], src[ 7]);
mtx.col[2] = bx::simd128_ld(src[ 8], src[ 9], src[10], src[11]);
mtx.col[3] = bx::simd128_ld(src[12], src[13], src[14], src[15]);
bx::float4x4_t inv;
bx::float4x4_inverse(&inv, &mtx);
float ref[16];
bx::mtxInverse(ref, src);
BX_ALIGN_DECL_16(float) result[16];
bx::simd128_st(&result[ 0], inv.col[0]);
bx::simd128_st(&result[ 4], inv.col[1]);
bx::simd128_st(&result[ 8], inv.col[2]);
bx::simd128_st(&result[12], inv.col[3]);
for (uint32_t ii = 0; ii < 16; ++ii)
{
const float diff = bx::abs(result[ii] - ref[ii]);
INFO("ii=" << ii << " result=" << result[ii] << " ref=" << ref[ii] << " diff=" << diff);
CHECK(bx::isEqual(result[ii], ref[ii], 0.0001f) );
}
}