(RV64 Only) SIMD 32-bit Miscellaneous Instructions

(RV64 Only) SIMD 32-bit Miscellaneous Instructions More...

Functions
__STATIC_FORCEINLINE unsigned long	__RV_KABS32 (unsigned long a)
	KABS32 (Scalar 32-bit Absolute Value with Saturation) More...
__STATIC_FORCEINLINE unsigned long	__RV_SMAX32 (unsigned long a, unsigned long b)
	SMAX32 (SIMD 32-bit Signed Maximum) More...
__STATIC_FORCEINLINE unsigned long	__RV_SMIN32 (unsigned long a, unsigned long b)
	SMIN32 (SIMD 32-bit Signed Minimum) More...
__STATIC_FORCEINLINE unsigned long	__RV_UMAX32 (unsigned long a, unsigned long b)
	UMAX32 (SIMD 32-bit Unsigned Maximum) More...
__STATIC_FORCEINLINE unsigned long	__RV_UMIN32 (unsigned long a, unsigned long b)
	UMIN32 (SIMD 32-bit Unsigned Minimum) More...

Detailed Description

(RV64 Only) SIMD 32-bit Miscellaneous Instructions

there are 5 (RV64 Only) SIMD 32-bit Miscellaneous Instructions

Function Documentation

__RV_KABS32()

__STATIC_FORCEINLINE unsigned long __RV_KABS32

(

unsigned long

a

)

KABS32 (Scalar 32-bit Absolute Value with Saturation)

Type: DSP (RV64 Only) 24 20 19 15 14 12 11 7 KABS32 10010 Rs1 000 Rd 6 0 GE80B 1111111

Syntax:

KABS32 Rd, Rs1

Purpose:
Get the absolute value of signed 32-bit integer elements in a general register.

Description:
This instruction calculates the absolute value of signed 32-bit integer elements stored in Rs1. The results are written to Rd. This instruction with the minimum negative integer input of 0x80000000 will produce a saturated output of maximum positive integer of 0x7fffffff and the OV flag will be set to 1.

Operations:

if (Rs1.W[x] >= 0) {
  res[x] = Rs1.W[x];
} else {
  If (Rs1.W[x] == 0x80000000) {
    res[x] = 0x7fffffff;
    OV = 1;
  } else {
    res[x] = -Rs1.W[x];
  }
}
Rd.W[x] = res[x];
for RV64: x=1...0

Parameters

[in]

a

unsigned long type of value stored in a

Returns

value stored in unsigned long type

Definition at line 13954 of file core_feature_dsp.h.

{
    unsigned long result;
    __ASM volatile("kabs32 %0, %1" : "=r"(result) : "r"(a));
    return result;
}

References __ASM.

__RV_SMAX32()

__STATIC_FORCEINLINE unsigned long __RV_SMAX32	(	unsigned long	a,
		unsigned long	b
	)

SMAX32 (SIMD 32-bit Signed Maximum)

Type: SIMD (RV64 Only)

Syntax:

SMAX32 Rd, Rs1, Rs2

Purpose:
Do 32-bit signed integer elements finding maximum operations simultaneously.

Description:
This instruction compares the 32-bit signed integer elements in Rs1 with the 32-bit signed integer elements in Rs2 and selects the numbers that is greater than the other one. The selected results are written to Rd.

Operations:

Rd.W[x] = (Rs1.W[x] > Rs2.W[x])? Rs1.W[x] : Rs2.W[x];
for RV64: x=1...0

Parameters

[in]	a	unsigned long type of value stored in a
[in]	b	unsigned long type of value stored in b

Returns

value stored in unsigned long type

Definition at line 16290 of file core_feature_dsp.h.

{
    unsigned long result;
    __ASM volatile("smax32 %0, %1, %2" : "=r"(result) : "r"(a), "r"(b));
    return result;
}

References __ASM.

__RV_SMIN32()

__STATIC_FORCEINLINE unsigned long __RV_SMIN32	(	unsigned long	a,
		unsigned long	b
	)

SMIN32 (SIMD 32-bit Signed Minimum)

Type: SIMD (RV64 Only)

Syntax:

SMIN32 Rd, Rs1, Rs2

Purpose:
Do 32-bit signed integer elements finding minimum operations simultaneously.

Description:
This instruction compares the 32-bit signed integer elements in Rs1 with the 32-bit signed integer elements in Rs2 and selects the numbers that is less than the other one. The selected results are written to Rd.

Operations:

Rd.W[x] = (Rs1.W[x] < Rs2.W[x])? Rs1.W[x] : Rs2.W[x];
for RV64: x=1...0

Parameters

[in]	a	unsigned long type of value stored in a
[in]	b	unsigned long type of value stored in b

Returns

value stored in unsigned long type

Definition at line 16634 of file core_feature_dsp.h.

{
    unsigned long result;
    __ASM volatile("smin32 %0, %1, %2" : "=r"(result) : "r"(a), "r"(b));
    return result;
}

References __ASM.

__RV_UMAX32()

__STATIC_FORCEINLINE unsigned long __RV_UMAX32	(	unsigned long	a,
		unsigned long	b
	)

UMAX32 (SIMD 32-bit Unsigned Maximum)

Type: SIMD (RV64 Only)

Syntax:

UMAX32 Rd, Rs1, Rs2

Purpose:
Do 32-bit unsigned integer elements finding maximum operations simultaneously.

Description:
This instruction compares the 32-bit unsigned integer elements in Rs1 with the 32-bit unsigned integer elements in Rs2 and selects the numbers that is greater than the other one. The selected results are written to Rd.

Operations:

Rd.W[x] = (Rs1.W[x] u> Rs2.W[x])? Rs1.W[x] : Rs2.W[x];
for RV64: x=1...0

Parameters

[in]	a	unsigned long type of value stored in a
[in]	b	unsigned long type of value stored in b

Returns

value stored in unsigned long type

Definition at line 17565 of file core_feature_dsp.h.

{
    unsigned long result;
    __ASM volatile("umax32 %0, %1, %2" : "=r"(result) : "r"(a), "r"(b));
    return result;
}

References __ASM.

__RV_UMIN32()

__STATIC_FORCEINLINE unsigned long __RV_UMIN32	(	unsigned long	a,
		unsigned long	b
	)

UMIN32 (SIMD 32-bit Unsigned Minimum)

Type: SIMD (RV64 Only)

Syntax:

UMIN32 Rd, Rs1, Rs2

Purpose:
Do 32-bit unsigned integer elements finding minimum operations simultaneously.

Description:
This instruction compares the 32-bit unsigned integer elements in Rs1 with the 32-bit unsigned integer elements in Rs2 and selects the numbers that is less than the other one. The selected results are written to Rd.

Operations:

Rd.W[x] = (Rs1.W[x] <u Rs2.W[x])? Rs1.W[x] : Rs2.W[x];
for RV64: x=1...0

Parameters

[in]	a	unsigned long type of value stored in a
[in]	b	unsigned long type of value stored in b

Returns

value stored in unsigned long type

Definition at line 17603 of file core_feature_dsp.h.

{
    unsigned long result;
    __ASM volatile("umin32 %0, %1, %2" : "=r"(result) : "r"(a), "r"(b));
    return result;
}

References __ASM.