Infineon TriCore TC1.6P User Manual

TriCore
®
TC1.6P & TC1.6E
32-bit Unified Processor Core
Instruction Set
V1.0 2013-07
User Manual (Volume 2) 3-375
SUBS.H
Subtract Packed Half-word with Saturation
SUBS.HU
Subtract Packed Half-word Unsigned with Saturation
Description
Subtract the contents of each half-word of data register D[b] from the contents of data register D[a]. Put the result
in each corresponding half-word of data register D[c], with saturation on signed (SUBS.H) or unsigned (SUBS.HU)
overflow.
SUBS.HD[c], D[a], D[b] (RR)
result_halfword1 = D[a][31:16] - D[b][31:16];
result_halfword0 = D[a][15:0] - D[b][15:0];
D[c] = {ssov(result_halfword1, 16), ssov(result_halfword0, 16)};
SUBS.HUD[c], D[a], D[b] (RR)
result_halfword1 = D[a][31:16] - D[b][31:16];
result_halfword0 = D[a][15:0] - D[b][15:0];
D[c] = {suov(result_halfword1, 16), suov(result_halfword0, 16)};
Status Flags
C Not set by these instructions.
V signed:
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;
unsigned:
ov_halfword1 = (result_halfword1 > FFFF
H
) OR (result_halfword1 < 0000
H
);
ov_halfword0 = (result_halfword0 > FFFF
H
) OR (result_halfword0 < 0000
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
6A
H
20 19
-
18 17
-
16 15
b
12 11
a
8 7
0B
H
0
31
c
28 27
6B
H
20 19
-
18 17
-
16 15
b
12 11
a
8 7
0B
H
0

Infineon TriCore TC1.6P Specifications

General

Brand	Infineon
Model	TriCore TC1.6P
Category	Microcontrollers
Language	English