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Check TEV register packing by content instead of uniform size

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The test expected one extra TEV register to grow the uniform by exactly
16 bytes, but the allocation is alignment-rounded, so it failed on the
fork's baseline. Build the uniform and check that the register and the
K color after it are packed next to each other instead.

From upstream patchzyy/Wiicompiled 6f14bde (#244, KartPad batch).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wg7mB8ogCWmp9GH19Uc82B
This commit is contained in:
Claude committed 2026-10-05 13:29:26 +00:00
1 parent 20ef08b3b8
commit 4407013d61
1 file changed
+25 -2
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aurora-main/tests/gx_fifo_test.cpp
+25 -2
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@@ -1328,12 +1328,35 @@ TEST(TevRegisterLivenessContract, PacksOneUniformWhenBothHalvesNeedInitialValue)
auto config = baseline;
config.tevStages[0].colorPass.a = GX_CC_C0;
config.tevStages[0].alphaPass.a = GX_CA_A0;
config.tevStages[0].colorPass.b = GX_CC_KONST;
config.tevStages[0].kcSel = GX_TEV_KCSEL_K0;
const auto baselineInfo = aurora::gx::build_shader_info(baseline);
const auto info = aurora::gx::build_shader_info(config);
EXPECT_TRUE(info.loadsTevRegRgb.test(GX_TEVREG0));
EXPECT_TRUE(info.loadsTevRegAlpha.test(GX_TEVREG0));
EXPECT_EQ(info.uniformSize, baselineInfo.uniformSize + sizeof(aurora::Vec4<float>));
// The final allocation is alignment-rounded, so adding one register need
// not increase it. Verify actual packing with a distinct following K color.
const auto savedReg = g_gxState.colorRegs[GX_TEVREG0];
const auto savedKColor = g_gxState.kcolors[GX_KCOLOR0];
g_gxState.colorRegs[GX_TEVREG0] = {11.f, 22.f, 33.f, 44.f};
g_gxState.kcolors[GX_KCOLOR0] = {55.f, 66.f, 77.f, 88.f};
EXPECT_TRUE(info.sampledKColors.test(GX_KCOLOR0));
aurora::gfx::testing::reset_uniform_allocations();
aurora::gx::build_uniform(info, 0, {}, {}, false);
const auto expectedReg = g_gxState.colorRegs[GX_TEVREG0];
const auto expectedKColor = g_gxState.kcolors[GX_KCOLOR0];
g_gxState.colorRegs[GX_TEVREG0] = savedReg;
g_gxState.kcolors[GX_KCOLOR0] = savedKColor;
const auto& bytes = aurora::gfx::testing::uniform_allocation(0);
const auto* reg = reinterpret_cast<const uint8_t*>(&expectedReg);
const auto found = std::search(bytes.begin(), bytes.end(), reg, reg + sizeof(aurora::Vec4<float>));
ASSERT_NE(found, bytes.end());
const size_t offset = static_cast<size_t>(found - bytes.begin());
ASSERT_LE(offset + 2 * sizeof(aurora::Vec4<float>), bytes.size());
EXPECT_EQ(std::memcmp(bytes.data() + offset + sizeof(aurora::Vec4<float>), &expectedKColor,
sizeof(aurora::Vec4<float>)),
0);
aurora::gfx::testing::reset_uniform_allocations();
}
// BP registers (direct FIFO writes, no dirty state flush needed)