IF (DEST[63-0] == SNaN) THEN SRC[63-0];ELSE IF SRC[63-0] == SNaN) THEN SRC[63-0];
ELSE IF (DEST[63-0] < SRC[63-0])
THEN DEST[63-0]
ELSE SRC[63-0];
FI;
* DEST[127-64] is unchanged *;
Opcode |
Instruction |
Description |
|---|---|---|
|
F2 0F 5D /r |
MINSD xmm1, xmm2/m64 |
Return the minimum scalar double-precision floating-point value between xmm2/mem64 and xmm1. |
Compares the low double-precision floating-point values in the destination operand (first operand) and the source operand (second operand), and returns the minimum value to low quadword of the destination operand. The source operand can be an XMM register or a 64-bit memory location. The destination operand is an XMM register. When the source operand is a memory operand, only the 64 bits are accessed.
If the values being compared are both 0.0s, the value in the source operand is returned. If a value in source operand 2 is an SNaN, that SNaN is forwarded unchanged to the destination (that is, a QNaN version of the SNaN is not returned).
Note that if only one value is a NaN for this instruction, the source operand value (either NaN or valid floating-point value) is written to the result. This behavior allows compilers to use the MINSD instruction for common C conditional constructs. If instead of this behavior, it is required that the NaN source operand be returned, the minimum functional can be emulated using a sequence of instructions: a comparison followed by AND, ANDN and OR.
DEST[63-0] IF (DEST[63-0] == SNaN) THEN SRC[63-0];
ELSE IF SRC[63-0] == SNaN) THEN SRC[63-0];
ELSE IF (DEST[63-0] <
SRC[63-0])
THEN DEST[63-0]
ELSE SRC[63-0];
FI;
* DEST[127-64] is unchanged *;
__m128d _mm_min_sd(__m128d a, __m128d b)
Invalid (including QNaN source operand), Denormal.
#GP(0) - For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments.
#SS(0) - If a memory operand effective address is outside the SS segment limit.
#PF(fault-code) - For a page fault.
#NM - If TS in CR0 is set.
#XM - If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.
#UD - If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 0. If EM in CR0 is set. If OSFXSR in CR4 is 0. If CPUID feature flag SSE2 is 0.
#AC - For unaligned memory reference if the current privilege level is 3.
Interrupt 13 - If any part of the operand lies outside the effective address space from 0 to 0FFFFH.
#NM - If TS in CR0 is set.
#XM - If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.
#UD - If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 0. If EM in CR0 is set. If OSFXSR in CR4 is 0. If CPUID feature flag SSE2 is 0.
Same exceptions as in Real Address Mode
#PF(fault-code) - For a page fault.
#AC - For unaligned memory reference if the current privilege level is 3.
For details, see Volume 2A and Volume 2B of the Intel(R) 64 and IA-32 Intel Architecture Software Developer's Manual. For the latest updates on the instruction set information, go to the web site.