모두의 코드
KORTESTW, KORTESTB, KORTESTQ, KORTESTDs (Intel x86/64 assembly instruction)
KORTESTW, KORTESTB, KORTESTQ, KORTESTD
OR Masks And Set Flags
참고 사항
아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.
Opcode/ | Op/ | 64/32 | CPUID | Description |
---|---|---|---|---|
| RR | V/V | AVX512F | Bitwise OR 16 bits masks k1 and k2 and update ZF and CF accordingly. |
| RR | V/V | AVX512DQ | Bitwise OR 8 bits masks k1 and k2 and update ZF and CF accordingly. |
| RR | V/V | AVX512BW | Bitwise OR 64 bits masks k1 and k2 and update ZF and CF accordingly. |
| RR | V/V | AVX512BW | Bitwise OR 32 bits masks k1 and k2 and update ZF and CF accordingly. |
Instruction Operand Encoding
Op/En | Operand 1 | Operand 2 |
---|---|---|
RR | ModRM:reg (w) | ModRM:r/m (r, ModRM:[7:6] must be 11b) |
Description
Performs a bitwise OR between the vector mask register k2, and the vector mask register k1, and sets CF and ZF based on the operation result.
ZF flag is set if both sources are 0x0. CF is set if, after the OR operation is done, the operation result is all 1's.
Operation
KORTESTW
TMP[15:0] <- DEST[15:0] BITWISE OR SRC[15:0] IF(TMP[15:0]=0) THEN ZF <- 1 ELSE ZF <- 0 FI; IF(TMP[15:0]=FFFFh) THEN CF <- 1 ELSE CF <- 0 FI;
KORTESTB
TMP[7:0] <- DEST[7:0] BITWISE OR SRC[7:0] IF(TMP[7:0]=0) THEN ZF <- 1 ELSE ZF <- 0 FI; IF(TMP[7:0]==FFh) THEN CF <- 1 ELSE CF <- 0 FI;
KORTESTQ
TMP[63:0] <- DEST[63:0] BITWISE OR SRC[63:0] IF(TMP[63:0]=0) THEN ZF <- 1 ELSE ZF <- 0 FI; IF(TMP[63:0]==FFFFFFFF_FFFFFFFFh) THEN CF <- 1 ELSE CF <- 0 FI;
KORTESTD
TMP[31:0] <- DEST[31:0] BITWISE OR SRC[31:0] IF(TMP[31:0]=0) THEN ZF <- 1 ELSE ZF <- 0 FI; IF(TMP[31:0]=FFFFFFFFh) THEN CF <- 1 ELSE CF <- 0 FI;
Intel C/C++ Compiler Intrinsic Equivalent
KORTESTW __mmask16 _mm512_kortest[cz](__mmask16 a, __mmask16 b);
Flags Affected
The ZF flag is set if the result of OR-ing both sources is all 0s.
The CF flag is set if the result of OR-ing both sources is all 1s.
The OF, SF, AF, and PF flags are set to 0.
Other Exceptions
See Exceptions Type K20.
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