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Fix 32 bit windows build crashing due to obscure possible compiler bug

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It was crashing with 'attempt to read from 0xFFFFFF', despite the fact that the faulting instruction was 'load XMM7 from ESP-0x10' and ESP was normal values like 0x01E3A048

Also, compiling at -O0 instead of -O1 didn't crash. So just disable the code, because working out exactly why it is crashing would take too much work
This commit is contained in:
UnknownShadow200 2025-07-26 10:50:43 +10:00
parent 663a8ef24b
commit 6dab29e62d
2 changed files with 3 additions and 12 deletions
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1
src/ClassiCube.vcxproj
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@ -599,7 +599,6 @@
<ClCompile Include="Graphics_SoftGPU.c" /> <ClCompile Include="Graphics_SoftGPU.c" />
<ClCompile Include="Gui.c" /> <ClCompile Include="Gui.c" />
<ClCompile Include="HeldBlockRenderer.c" /> <ClCompile Include="HeldBlockRenderer.c" />
<ClCompile Include="Http_Web.c" />
<ClCompile Include="Http_Worker.c" /> <ClCompile Include="Http_Worker.c" />
<ClCompile Include="InputHandler.c" /> <ClCompile Include="InputHandler.c" />
<ClCompile Include="Inventory.c" /> <ClCompile Include="Inventory.c" />

12
third_party/bearssl/chacha20_sse2.c vendored
View File

@ -40,21 +40,13 @@ br_chacha20_sse2_get(void)
* If using 64-bit mode, then SSE2 opcodes should be automatically * If using 64-bit mode, then SSE2 opcodes should be automatically
* available, since they are part of the ABI. * available, since they are part of the ABI.
* *
* In 32-bit mode, we use CPUID to detect the SSE2 feature. * In 32-bit mode, not used due anymore to hitting an obscure possible compiler bug.
*/ */
#if BR_amd64 #if BR_amd64
return &br_chacha20_sse2_run; return &br_chacha20_sse2_run;
#else #else
return 0;
/*
* SSE2 support is indicated by bit 26 in EDX.
*/
if (br_cpuid(0, 0, 0, 0x04000000)) {
return &br_chacha20_sse2_run;
} else {
return 0;
}
#endif #endif
} }