Electrical computers and digital processing systems: processing – Byte-word rearranging – bit-field insertion or extraction,...
Patent
1998-07-22
2000-01-25
Pan, Daniel H.
Electrical computers and digital processing systems: processing
Byte-word rearranging, bit-field insertion or extraction,...
712210, 712204, 712202, 711212, 711132, 711206, G06F 934, G06F 1204
Patent
active
060187999
ABSTRACT:
Apparatus, methods and computer program products are disclosed that enable a compiler to generate efficient code to access stack registers on a register stack. The invention operates by transforming a three-operand instruction, within a compiler's intermediate representation, to one or more fewer-than-three-operand instructions. The invention also transforms the instruction's operand addressing from an access to a pseudo-named register to an access to a stack register through stack offset into a register stack. The invention also determines the register stack state at each instruction responsive to register stack permutations and maps the stack offset accordingly for each subsequent access to a stack register.
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Cox David M.
Morosov Serguei V.
Seberger David A.
Wallace David R.
Wenitsky Serguei L.
Pan Daniel H.
Shenker Michael
Sun Microsystems Inc.
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