ÐïëëÜ ðñÜãìáôá ìðïñïýÃ* Ã*á ðÜÃ*å óôñáâÜ óôï BC, åîïý êáé ç áÃ*Üãêç patching, åéäéêÜ áÃ* ìéëÜìå ãéá low-level ðñïãñáììáôéóìü.
Ìðïñåß Ã*áé ìåÃ* ÝÃ*á ðáé÷Ã*ßäé Ã*á ôñÝ÷åé unpatched, áëëÜ Ã*á ðáñïõóéÜæåé visual glitches. Èá ÞôáÃ* áðïäåêôü êÜôé ôÝôïéï; ÄåÃ* Ã*ïìßæù.
Åäþ Ã*á óçìåéþóù üôé ç ISA (Instruction Set Architecture, áõôü ðïõ ëÝìå áñ÷éôåêôïÃ*éêÞ êáé óåô åÃ*ôïëþÃ*) ôçò RDNA2 GPU åßÃ*áé ç GCN. Áõôü ôï ëÝù ãéáôß êõêëïöïñåß óõ÷Ã*Ü ùò ðáñáÃ*üçóç óôï äéáäßêôõï (äåÃ* ìéëÜù ãéá åäþ ìÝóá ðñïò áðïöõãÞÃ* ðáñåîçãÞóåùÃ*).
Ìá èá ðåé êÜðïéïò äåÃ* åßÃ*áé GCN! Êáé üìùò, GCN åßÃ*áé (äåÃ* Ý÷åé áëëÜîåé ç áñ÷éôåêôïÃ*éêÞ), åéäÜëëùò äåÃ* èá åß÷áìå êáÃ* BC. ÅÃ*ôåëþò äéáöïñåôéêÞ áñ÷éôåêôïÃ*éêÞ = bye-bye BC (ìéëÜù ãéá native execution, ü÷é emulation).
Ç RDNA/Navi åßÃ*áé -ãéá Ã*á ôï ðù áðëïúêÜ- GCN ìå tiled rasterizer (ðïõ áÃ*åâÜæåé ôï efficiency êáé ñß÷Ã*åé ôçÃ* êáôáÃ*Üëùóç). ¸÷ù îáÃ*áãñÜøåé óå Üëëï post ôé åßÃ*áé ôï tiling êáé ðùò äïõëåýåé (óðÜóéìï ôçò åéêüÃ*áò/framebuffer óå êïõôÜêéá ãéá ðéï efficient åðåîåñãáóßá ãñáöéêþÃ*).
Ãéá Ã*á ìçÃ* õðÜñ÷åé êáìßá ðáñÜÃ*ïçóç ëïéðüÃ*:
GCN = ç GPU ISA
Polaris/RDNA = uarch (ìéêñïáñ÷éôåêôïÃ*éêÞ)
Ôï Ã*á ðåé êÜðïéïò äåÃ* åßÃ*áé GCN ISA ç RDNA2 uarch, åßÃ*áé óáÃ* Ã*á ðåé êÜðïéïò ôï åîÞò ðáñÜëïãï: üôé ç Zen 2 CPU äåÃ* åßÃ*áé x86-64!
x86-64 = ç CPU ISA
Jaguar/Zen 2 = ç ìéêñïáñ÷éôåêôïÃ*éêÞ
Ôé åßÃ*áé ç ìéêñïáñ÷éôåêôïÃ*éêÞ; ÅßÃ*áé ç åêÜóôïôå õëïðïßçóç ôçò áñ÷éôåêôïÃ*éêÞò.
Ç áñ÷éôåêôïÃ*éêÞ åßÃ*áé ìéá (áëëÜæåé ðïëý óðÜÃ*éá), áëëÜ ïé ìéêñïáñ÷éôåêôïÃ*éêÝò ðïëëÝò êáé äéÜöïñåò (êÜðïéåò êáëÝò, êÜðïéåò ìÝôñéåò, êÜðïéåò êáêÝò).
¼óï ðéï Ã*åüôåñç åßÃ*áé ìéá ìéêñïáñ÷éôåêôïÃ*éêÞ, ôüóï ðéï efficient åßÃ*áé (óõÃ*Þèùò äçëáäÞ, óðáÃ*ßùò èá õðÜñîåé efficiency regression).
Ï ëüãïò ðïõ äåÃ* áëëÜæåé ç áñ÷éôåêôïÃ*éêÞ/ISA åßÃ*áé ëüãù BC requirements. ÔÝëåéï BC üìùò äåÃ* õðÜñ÷åé ðïõèåÃ*Ü (ïýôå êáÃ* óå PC, áó÷Ýôùò ôïõ ôé áêïýôå).







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