As SSE2 does not have this problem, usually provides much better throughput and provides more registers in 64-bit code, it should be preferred for nearly all vectorization work.The following IA-32 CPUs were released after SSE2 was developed, but did not implement it:If codes designed for x87 are ported to the lower precision double precision SSE2 floating point, certain combinations of math operations or input datasets can result in measurable numerical deviation, which can be an issue in reproducible scientific computations, e.g. AMD Athlon XP AMD Athlon XP M AMD Duron AMD Geode – Alle Typen: NX, GX, LX (auch K7 genannt) AMD K5 AMD K6 (auch alle K6-2 und K6-3) AMD K7 Athlon AMD mk6 – Alle Typen: mK6-III, mK6-2+, mK6-2, mk6 (auch K6 genannt) AMD Mobile Athlon 4 AMD Mobile Duron AMD mSepron AMD Sempron vom Typ K7 z.B. • AMD Athlon XP 3000+ Bustakt: 166MHz Bustakt für DDR: 333MHz relative Geschwindigkeit 3GHz interne Taktfrequenz: 2167MHz Gehäusetyp: OPGA Betriebsspannung: 1.65V L1 Cache: 128KB L2 Cache: 512KB Sockel: Sockel A Barton UND • AMD Sempron 3000+ Bustakt: 800MHz Hyper Transport relative Geschwindigkeit: 3,0GHz interne Taktfrequenz: 1800MHz Gehäusetyp: OPGA Core Spannung: 1,41V … CPU ID information for the Sempron 3000+ (rev. Since the problem is not locally apparent in the MMX code, finding and correcting the bug can be very time consuming. Since MMX and x87 register files alias one another, using MMX will prevent x87 instructions from working as desired. Pro - Keine Pro's - Contra - Keine Contra's - Kommentar Bei fehlenden Werten, Fragen, Ergänzungen oder Fehlern verwende dieses Kontaktformular Kaufangebote für AMD Sempron 3000+ AMD Sempron 3000+ 1.8GHz Sockel 754 Prozessor (3000+ 1.8GHz, Palermo, 128KB Cache, SKT 754, In-A-Box mit Ku00fchler und 3 Jahren … MMX / SSE / SSE2 performance . … In such cases, the corrupt floating-point state caused by failure to emit emms may go undetected for millions of instructions before ultimately causing the floating-point routine to fail, returning NaN. From a hardware and user standpoint, the Socket A Sempron CPUs were essentially identical to Athlon XP desktop CPUs with a new brand name.
Later, AMD introduced the Sempron 3000+ CPU, based on the Barton core with 512 KiB L2 cache. Mobile Sempron 3000+ 1800 MHz: 128 kB: 800 MHz: 9x: 0.95 - 1.4 V: 13 - 62 W: July 28, 2004: SMN3000BIX2AY "Dublin" (Socket 754, CG, 130 nm, Low power) MMX, SSE, SSE2, Enhanced 3DNow!, NX bit. if the calculation results must be compared against results generated from a different machine architecture. The second generation (Paris/Palermo core) was based on the architecture of the Socket 754 Athlon 64. It extends the earlier SSE instruction set, and is intended to fully replace MMX. Since an SSE2 register is twice as long as an MMX register, loop counters and memory access may need to be changed to accommodate this. Bemerkungen MMX, 3DNow!, SSE, SSE2, NX, Q'n'Q: Fazit zur Prozessorserie. Therefore, it is possible to convert all existing MMX code to an SSE2 equivalent. 2 Voltage TDP Release Date Part Number(s) Mobile Sempron 2600+ 1600 MHz: 128 kB: 800 MHz: 8x: 0.975 - 1.25 V: 9 - 25 W: July 28, … Once MMX has been used, the programmer must use the emms instruction (C: _mm_empty()) to restore operation to the x87 register file. AMD bietet unter dem Markennamen Sempron technisch unterschiedliche Prozessortypen an: Die Versionen für den Sockel A sind umbenannte Athlon XPs mit Thoroughbred- und Thorton-Core (256 kB L2-Cache) und einem auf 166 MHz getakteten FSB, die deshalb auch nur MMX, 3DNow!