(RV64 Only) SIMD 32-bit Miscellaneous Instructions

__STATIC_FORCEINLINE unsigned long __RV_KABS32 (unsigned long a)
__STATIC_FORCEINLINE unsigned long __RV_SMAX32 (unsigned long a, unsigned long b)
__STATIC_FORCEINLINE unsigned long __RV_SMIN32 (unsigned long a, unsigned long b)
__STATIC_FORCEINLINE unsigned long __RV_UMAX32 (unsigned long a, unsigned long b)
__STATIC_FORCEINLINE unsigned long __RV_UMIN32 (unsigned long a, unsigned long b)
group NMSIS_Core_DSP_Intrinsic_RV64_SIMD_32B_MISC

(RV64 Only) SIMD 32-bit Miscellaneous Instructions

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

Functions

__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

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

Returns

value stored in unsigned long type

__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

  • a – [in] unsigned long type of value stored in a

  • b – [in] unsigned long type of value stored in b

Returns

value stored in unsigned long type

__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

  • a – [in] unsigned long type of value stored in a

  • b – [in] unsigned long type of value stored in b

Returns

value stored in unsigned long type

__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

  • a – [in] unsigned long type of value stored in a

  • b – [in] unsigned long type of value stored in b

Returns

value stored in unsigned long type

__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

  • a – [in] unsigned long type of value stored in a

  • b – [in] unsigned long type of value stored in b

Returns

value stored in unsigned long type