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參數(shù)資料
| 型號： | PC7457VGU1200N |
| 廠商： | Atmel Corp. |
| 英文描述： | PowerPC 7457 RISC Microprocessor |
| 中文描述： | 7457的PowerPC RISC微處理器 |
| 文件頁數(shù)： | 5/66頁 |
| 文件大?。?/td> | 522K |
| 代理商： | PC7457VGU1200N |
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5
PC7457/47 [Preliminary]
5345B–HIREL–02/04
–
Four integer units (IUs) that share 32 GPRs for integer operands
Three identical IUs (IU1a, IU1b, and IU1c) can execute all integer
instructions except multiply, divide, and move to/from special-purpose
register instructions
IU2 executes miscellaneous instructions including the CR logical operations,
integer multiplication and division instructions, and move to/from special-
purpose register instructions
–
Five-stage FPU and a 32-entry FPR file
Fully IEEE 754-1985-compliant FPU for both single- and double-precision
operations
Supports non-IEEE mode for time-critical operations
Hardware support for denormalized numbers
Thirty-two 64-bit FPRs for single- or double-precision operands
–
Four vector units and 32-entry vector register file (VRs)
Vector permute unit (VPU)
Vector integer unit 1 (VIU1) handles short-latency AltiVec
integer
instructions, such as vector add instructions (vaddsbs, vaddshs, and
vaddsws, for example)
Vector integer unit 2 (VIU2) handles longer-latency AltiVec integer
instructions, such as vector multiply add instructions (vmhaddshs,
vmhraddshs, and vmladduhm, for example)
Vector floating-point unit (VFPU)
–
Three-stage load/store unit (LSU)
Supports integer, floating-point, and vector instruction load/store traffic
Four-entry vector touch queue (VTQ) supports all four architected AltiVec
data stream operations
Three-cycle GPR and AltiVec load latency (byte, half-word, word, vector)
with one-cycle throughput
Four-cycle FPR load latency (single, double) with one-cycle throughput
No additional delay for misaligned access within double-word boundary
Dedicated adder calculates effective addresses (EAs)
Supports store gathering
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| PC7457VGU933L | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 7457 RISC Microprocessor |
| PC7457VGU933N | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:PowerPC 7457 RISC Microprocessor |
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