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Extension Instruction Specifications
3-23
MCST (Multiply-and-accumulate operation results 8-, 16-, 32-bit saturation operation instruction)
[Instruction Format (Macro Name)]
MCST
Dm, Dn
MCST
imm8, Dn
[Assembler Mnemonic]
udf02
Dm, Dn
udf02
imm8, Dn
: Only 0x20, 0x10, and 0x08 are valid as values for imm8
[Operation]
This instruction sets the contents of the multiply-and-accumulate operation overflow detect register MCVF in the V
flag. In addition, depending on the value of Dm or imm8, the following operations are performed.
(1) When the value of Dm or imm8 is 32 (0x00000020)
When the 64-bit result of the multiply-and-accumulate operation that is stored in the multiply-and-accumulate
registers MCRH and MCRL is equal to or greater than the maximum positive value for a 32-bit signed numeric
value (0x000000007fffffff), the maximum positive value (0x7fffffff) is stored in Dn. If the value stored in the
multiply-and-accumulate registers MCRH and MCRL is equal to or less than the maximum negative value for a 32-
bit signed numeric value (0xffffffff80000000), the maximum negative value (0x80000000) is stored in Dn. In all
other cases, the contents of MCRL are stored in Dn.
(2) When the value of Dm or imm8 is 16 (0x00000010)
When the 64-bit result of the multiply-and-accumulate operation that is stored in the multiply-and-accumulate
registers MCRH and MCRL is equal to or greater than the maximum positive value for a 16-bit signed numeric
value (0x0000000000007fff), the maximum positive value (0x00007fff) is stored in Dn. If the value stored in the
multiply-and-accumulate registers MCRH and MCRL is equal to or less than the maximum negative value for a 16-
bit signed numeric value (0xffffffffffff8000), the maximum negative value (0xffff8000) is stored in Dn. In all other
cases, the contents of MCRL are stored in Dn.
(3) When the value of Dm or imm8 is 8 (0x00000008)
When the 32-bit result of the multiply-and-accumulate operation that is stored in the multiply-and-accumulate
register MCRL is equal to or greater than the maximum positive value for an 8-bit signed numeric value (0x0000007f),
the maximum positive value (0x7f) is stored in Dn. If the value stored in the multiply-and-accumulate register
MCRL is equal to or less than the maximum negative value for an 8-bit signed numeric value (0xffffff80), the
maximum negative value (0x80) is stored in Dn. In all other cases, the contents of MCRL are stored in Dn.
(4) When the value of Dm or imm8 is any other value
The value in Dn is undefined.
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...