Load Halfword Functional Testing |
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This test case includes a Job Script and High Level Assembler (HLASM) that will perform functional testing of the Load Halfword (LH) instruction. The results of the functional testing will be written to a user log file. The content of the affected General Purpose registers will be presented using hexadecimal notation.
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This test case includes a Job Script and High Level Assembler (HLASM) that will perform functional testing of the Load Halfword (LH) instruction. The results of the functional testing will be written to a user log file. The content of the affected General Purpose registers will be presented using hexadecimal notation.
The two bytes (halfword) located at the storage address specified by operand-2 (x2+b2+d2) is treated as a 16 bit, signed binary integer and is loaded into the rightmost two bytes (bits 16-31) of the register specified by operand-1 (r1). The leftmost two bytes (bits 0-15) of the register specified by operand-1 (r1) are filled based on the sign bit from operand-2. For example, if operand-2 contains a positive value then the leftmost two bytes will be x'0000'. if operand-2 contains a negative value then the leftmost two bytes will be x'FFFF'.
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LH, Load Halfword Instruction, the operand format is R1,D2(X2,B2) |
The following shows the content of the user log file after the program is executed.
* AILH00A1 is Starting, Demo for LH Instruction... * AILH00A1 Demo for HLASM, LH Instruction v24.01.01 http://www.simotime.com * AILH00A1 Copyright 1987-2024 SimoTime Technologies All Rights Reserved * AILH00A1 Enter Task-001, Initialize Register 8 (R8) and review content ....:....1....:....2....:....3....:....4....:....5....:....6....:....7....:....8 55555555 * AILH00A1 Leave Task-001, Previous line shows content of R8 using Hex-Notation * * AILH00A1 Enter Task-002, Execute LH Instruction and Review register content * AILH00A1 Mnemonic Format . . . . LH R8,HWP_123 where HWP_123 = +123 ....:....1....:....2....:....3....:....4....:....5....:....6....:....7....:....8 0000007B * AILH00A1 Leave Task-002, Previous line shows content of R8 using Hex-Notation * * AILH00A1 Enter Task-003, Execute LH Instruction and Review register content * AILH00A1 Mnemonic Format . . . . LH R8,HWN_123 where HWN_123 = -123 ....:....1....:....2....:....3....:....4....:....5....:....6....:....7....:....8 FFFFEDCD * AILH00A1 Leave Task-003, Previous line shows content of R8 using Hex-Notation * * AILH00A1 Enter Task-004, End of Program processing * AILH00A1 is Finished, Demo for LH Instruction...
This test case will perform functional testing of the Load Halfword (LH) instruction. The results of the functional testing will be written to a user log file. The content of the affected General Purpose registers will be presented using hexadecimal notation.
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