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gpu: fixed off-by-one in drawingOffset sign extending
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src/device/gpu/gpu.cpp

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -490,8 +490,8 @@ void GPU::writeGP0(uint32_t data) {
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drawingArea.bottom = (arguments[0] & 0xffc00) >> 10;
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} else if (command == 0xe5) {
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// Drawing offset
493-
drawingOffsetX = extend_sign<11>(arguments[0] & 0x7ff);
494-
drawingOffsetY = extend_sign<11>((arguments[0] >> 11) & 0x7ff);
493+
drawingOffsetX = extend_sign<10>(arguments[0] & 0x7ff);
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drawingOffsetY = extend_sign<10>((arguments[0] >> 11) & 0x7ff);
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} else if (command == 0xe6) {
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// Mask bit setting
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gp0_e6._reg = arguments[0];

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