Infineon TriCore TC1.6P - ABSDIFS.H - Absolute Value of Difference Packed Half-Word W Saturation

TriCore
®
TC1.6P & TC1.6E
32-bit Unified Processor Core
Instruction Set
V1.0 2013-07
User Manual (Volume 2) 3-9
ABSDIFS.H
Absolute Value of Difference Packed Half-word with Saturation
Description
Compute the absolute value of the difference of the corresponding half-words of D[a] and D[b] and put each result
in the corresponding half-word of D[c]. The operands are treated as signed 16-bit integers, with saturation on
signed overflow. The overflow condition is calculated for each half-word of the packed quantity.
ABSDIFS.HD[c], D[a], D[b] (RR)
result_halfword1 = (D[a][31:16] > D[b][31:16]) ? (D[a][31:16] - D[b][31:16]) : (D[b][31:16] - D[a][31:16]);
result_halfword0 = (D[a][15:0] > D[b][15:0) ? (D[a][15:0] - D[b][15:0]) : (D[b][15:0] - D[a][15:0]);
D[c] = {ssov(result_halfword1, 16), ssov(result_halfword0, 16)};
Status Flags
Examples
absdifs.h d3, d1, d2
See Also
ABS.B, ABS.H, ABSS.H, ABSDIFS.H
C Not set by this instruction.
V ov_halfword1 = (result_halfword1 > 7FFF
H
) OR (result_halfword1 < -8000
H
);
ov_halfword0 = (result_halfword0 > 7FFF
H
) OR (result_halfword0 < -8000
H
);
overflow = ov_halfword1 OR ov_halfword0;
if (overflow) then PSW.V = 1 else PSW.V = 0;
SV if (overflow) then PSW.SV = 1 else PSW.SV = PSW.SV;
AV aov_halfword1 = result_halfword1[15] ^ result_halfword1[14];
aov_halfword0 = result_halfword0[15] ^ result_halfword0[14];
advanced_overflow = aov_halfword1 OR aov_halfword0;
if (advanced_overflow) then PSW.AV = 1 else PSW.AV = 0;
SAV if (advanced_overflow) then PSW.SAV = 1 else PSW.SAV = PSW.SAV;
31
c
28 27
6F
H
20 19
-
18 17
-
16 15
b
12 11
a
8 7
0B
H
0