TricoreTC1.6.2指令集_tricore

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TriCore

TC1.6.2 core architecture manual - Instruction set

32-bit Unified Processor Core

Instruction Set Information

Table 10

Cache Functions

Function

Definition

cache_index_wb

if ((CACHE[index,elem].valid==1) AND (CACHE[index,elem].modified==1))

then {

pa = CACHE[index,elem].physical_address;

M[pa,cacheline] = CACHE[index,elem].data;

CACHE[index,elem].modified = 0;

}

cache_index_wi

if (CACHE[index,elem].valid==1) then {

if (CACHE[index,elem].modified==1) then {

pa = CACHE[index,elem].physical_address;

M[pa,cacheline] = CACHE[index,elem].data;

}

CACHE[index,elem].modified = 0;

CACHE[index,elem].valid = 0;

}

User Manual (Volume 2)

1-12

V1.2.2

2020-01-15

TriCore

TC1.6.2 core architecture manual - Instruction set

32-bit Unified Processor Core

Instruction Set Information

1.3.3

Floating Point Operation Syntax

The following table defines the floating point operation syntax.

Table 11

Floating Point Operation Syntax

Syntax

Definition

ADD_NAN

7FC00001

DIV_NAN

7FC00008

HP_MAX_VALUE

65504

HP_MIN_NORMAL

HP_NEG_INFINITY

FC00

HP_POS_INFINITY

7C00

MUL_NAN

7FC00002

NEG_INFINITY

FF800000

POS_INFINITY

7F800000

SQRT_NAN

7FC00004

add(x,y)

Adds the real value ‘x’ to the real value ‘y’ and returns an infinitely accurate

real result.

approx_inv_sqrt(x)

Takes the real argument x and returns the approximate inverse square root (x

0.5

) to at least 6.75 bits of precision.

denorm_to_zero(x)

If the IEEE-754-2008 32-bit single precision floating point format value ‘x’ is a

denormal, return the appropriately signed infinitely accurate real value 0.

Otherwise return ‘x’ as an infinitely accurate real value; i.e.

if ((x < 0) AND (x > -2

-126

)) then return -0.0;

else if ((x > 0) AND (x < 2

-126)

) then return +0.0;

else return f_real(x);

divide(x,y)

Divides the real value ‘x’ by the real value ‘y’ and returns an infinitely accurate

real result.

fp_abs(x)

Returns the infinitely accurate absolute value of the real value ‘x’; i.e. (x < 0.0)

? (0.0 - x) : x;

f_real_16bit(x)

Returns the IEEE-754-2008 16-bit half precision floating point format value ‘x’

as an infinitely accurate real value.

f_real(x)

Returns the IEEE-754-2008 32-bit single precision floating point format value

‘x’ as an infinitely accurate real value.

ieee754_round_16bit(f, m)

Rounds the real value ‘f’ to another real value which is exactly representable

by a 16-bit half precision format number using the type of rounding specified

by ‘m’, compliant with IEEE-754-2008. Note that the result may be

representable only as a denormal half precision value.

ieee754_16bit_format(f)

Returns the real value ‘f’ in the 16-bit IEEE-754-2008 half precision floating

point format. ‘f’ is converted to the correct IEEE-754-2008 result on overflow

or underflow. The return value may be a 16-bit half precision denormal value.

ieee754_16bit_overflow(f)

Takes a real value ‘f’ and returns the boolean result of the expression:

( | f | > HP_MAX_VALUE)

ieee754_16bit_underflow(f)

Takes a real value ‘f’ and returns the boolean result of the expression:

( | f | < HP_MIN_NORMAL & | f | > 0)

User Manual (Volume 2)

1-13

V1.2.2

2020-01-15

TriCore

TC1.6.2 core architecture manual - Instruction set

32-bit Unified Processor Core

Instruction Set Information

Table 11

Floating Point Operation Syntax

Syntax

Definition

ieee754_32bit_format(x)

Returns the real value ‘x’ in the standard 32-bit single precision IEEE-754-2008

floating point format. ‘x’ is converted to the correct IEEE-754-2008 result on

overflow or underflow.

ieee754_eq(x,y)

Returns TRUE if ‘x’ is equal to ‘y’ according to the IEEE-754-2008 rules for 32-

bit single precision floating point numbers otherwise returns FALSE.

ieee754_gt(x,y)

Returns TRUE if ‘x’ is greater than ‘y’ according to the IEEE-754-2008 rules for

32-bit single precision floating point numbers otherwise returns FALSE.

ieee754_lt(x,y)

Returns TRUE if ‘x’ is less than ‘y’ according to the IEEE-754-2008 rules for 32-

bit single precision floating point numbers otherwise returns FALSE.

ieee754_round(x,y)

Rounds the real value ‘x’ using the type of rounding specified by ‘y’ compliant

with IEEE-754-2008.

i_real(x)

Returns a infinitely accurate real number of equal value to the 32-bit signed

integer value ‘x’.

is_denorm(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression: (x[30:23] == 0) AND (x[22:0]

!= 0);

is_inf(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression: (is_neg_inf(x) OR

is_pos_inf(x));

is_inf_16bit(x)

Takes the IEEE-754-2008 16-bit half precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[15:0] == HP_POS_INFINITY) OR (x[15:0] == HP_NEG_INFINITY)

is_nan(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression: (is_s_nan(x) OR

is_q_nan(x));

is_nan_16bit(x)

Takes the IEEE-754-2008 16-bit half precision floating point format value ‘x’

and returns the boolean result of the expression:

(is_s_nan_16bit(x) OR is_q_nan_16bit(x))

is_neg_inf(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[31:0] == NEG_INFINITY);

is_pos_inf(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[31:0] == POS_INFINITY);

is_q_nan(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[30:23] == 8’b11111111) AND (x[22] == 1’b1);

is q_nan_16bit(x)

Takes the IEEE-754-2008 16-bit half precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[14:10] == 11111

) AND (x[9]==1)

is_s_nan(x)

Takes the IEEE-754-2008 32-bit single precision floating point format value ‘x’

and returns the boolean result of the expression:

(x[30:23] == 8'b11111111) AND (x[22] == 1’b0) AND (x[21:0] != 0);

V1.2.2

User Manual (Volume 2)

1-14

2020-01-15

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