Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

4-28 Vol. 2B
INSTRUCTION SET REFERENCE, N-Z
DEST[55:48] ← SaturateSignedWordToSignedByte (DEST[111:96]);
DEST[63:56] ← SaturateSignedWordToSignedByte (DEST[127:112]);
DEST[71:64] ← SaturateSignedWordToSignedByte (SRC[15:0]);
DEST[79:72] ← SaturateSignedWordToSignedByte (SRC[31:16]);
DEST[87:80] ← SaturateSignedWordToSignedByte (SRC[47:32]);
DEST[95:88] ← SaturateSignedWordToSignedByte (SRC[63:48]);
DEST[103:96] ← SaturateSignedWordToSignedByte (SRC[79:64]);
DEST[111:104] ← SaturateSignedWordToSignedByte (SRC[95:80]);
DEST[119:112] ← SaturateSignedWordToSignedByte (SRC[111:96]);
DEST[127:120] ← SaturateSignedWordToSignedByte (SRC[127:112]);
PACKSSDW instruction with 128-bit operands:
DEST[15:0] ← SaturateSignedDwordToSignedWord (DEST[31:0]);
DEST[31:16] ← SaturateSignedDwordToSignedWord (DEST[63:32]);
DEST[47:32] ← SaturateSignedDwordToSignedWord (DEST[95:64]);
DEST[63:48] ← SaturateSignedDwordToSignedWord (DEST[127:96]);
DEST[79:64] ← SaturateSignedDwordToSignedWord (SRC[31:0]);
DEST[95:80] ← SaturateSignedDwordToSignedWord (SRC[63:32]);
DEST[111:96] ← SaturateSignedDwordToSignedWord (SRC[95:64]);
DEST[127:112] ← SaturateSignedDwordToSignedWord (SRC[127:96]);
Intel C/C++ Compiler Intrinsic Equivalents
PACKSSWB __m64 _mm_packs_pi16(__m64 m1, __m64 m2)
PACKSSDW __m64 _mm_packs_pi32 (__m64 m1, __m64 m2)
Flags Affected
None.
Protected Mode Exceptions
#GP(0) If a memory operand effective address is outside the CS, DS,
ES, FS, or GS segment limit.
(128-bit operations only) If a memory operand is not aligned on
a 16-byte boundary, regardless of segment.
#SS(0) If a memory operand effective address is outside the SS
segment limit.
#UD If CR0.EM[bit 2] = 1.
(128-bit operations only) If CR4.OSFXSR[bit 9] = 0.
#NM If CR0.TS[bit 3] = 1.
#MF (64-bit operations only) If there is a pending x87 FPU exception.
#PF(fault-code) If a page fault occurs.