PM0214 datasheet(240/245 Pages) STMICROELECTRONICS

240 / 245 page

Core peripherals

PM0214

240/245

DocID022708 Rev 4

Bit 28

V: Overflow condition code flag. Floating-point comparison operations update this flag. For more

details on the result, refer to Table 57.

0: Operation did not result in an overflow

1: Operation resulted in an overflow.

Bit 27

Reserved.

Bit 26

AHP: Alternative half-precision control bit:

0: IEEE half-precision format selected.

1: Alternative half-precision format selected.

Bit 25

DN: Default NaN mode control bit:

0: NaN operands propagate through to the output of a floating-point operation.

1: Any operation involving one or more NaNs returns the Default NaN.

Bit 24

FZ: Flush-to-zero mode control bit:

0: Flush-to-zero mode disabled. Behavior of the floating-point system is fully compliant with the

IEEE 754 standard.

1: Flush-to-zero mode enabled.

Bits 23:22

RMode: Rounding Mode control field. The specified rounding mode is used by almost all

floating-point instructions:

0b00: Round to nearest (RN) mode

0b01: Round towards plus infinity (RP) mode

0b10: Round towards minus infinity (RM) mode

0b11: Round towards zero (RZ) mode.

Bit 21:8

Reserved.

Bit 7

IDC: Input denormal cumulative exception bit. Cumulative exception bit for floating-point

exception.

1: Indicates that the corresponding exception occurred since 0 was last written to it.

Bit 6:5

Reserved

Bit 4

IXC: Inexact cumulative exception bit. Cumulative exception bit for floating-point exception.

1: Indicates that the corresponding exception occurred since 0 was last written to it.

Bit 3

UFC: Underflow cumulative exception bit. Cumulative exception bit for floating-point exception.

1: Indicates that the corresponding exception occurred since 0 was last written to it.

Bit 2

OFC: Overflow cumulative exception bit. Cumulative exception bit for floating-point exception.

1: Indicates that the corresponding exception occurred since 0 was last written to it.

Bit 1

DZC: Division by zero cumulative exception bit. Cumulative exception bit for floating-point

exception. 1: Indicates that the corresponding exception occurred since 0 was last written to it.

Bit 0

IOC: Invalid operation cumulative exception bit. Cumulative exception bit for floating-point

exception. 1: Indicates that the corresponding exception occurred since 0 was last written to it.

Table 57. Effect of a Floating-point comparison on the condition flags

Comparison result

Equal

Less than

Greater than

Unordered

PM0214 датащи(PDF) 240 Page - STMicroelectronics

PM0214 датащи(HTML) 240 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL