Renesas M32R/ECU Series, User Manual, Page: 49 / 839

2
2-12
32180 Group User’s Manual (Rev.1.0)
CPU
2.6 Data Formats
(5) Transfer from memory (signed) to registers
• Signed 32 bits
LD24 Rsrc, #label
LD Rdest,
@Rsrc
• Signed 16 bits
LD24 Rsrc, #label
LDH Rdest,
@Rsrc
• Signed 8 bits
LD24 Rsrc, #label
LDB Rdest,
@Rsrc
label
Rdest
b31 b0
+0 +1 +2 +3
Rdest
label
00 00
FF FF
Determined by MSB
b31 b0
+0 +1 +2 +3
Rdest
label
00 00 00
FF FF FF
b31 b0
+0 +1 +2 +3
Determined by MSB
Memory Register
0: Positive number
1: Negative number
0: Positive number
1: Negative number
• Unsigned 32 bits
LD24 Rsrc, #label
LD Rdest,
@Rsrc
• Unsigned 16 bits
LD24 Rsrc, #label
LDUB Rdest, @Rsrc
• Unsigned 8 bits
LD24 Rsrc, #label
LDUH Rdest, @Rsrc
Rdest
00 00
b31 b0
label
+0 +1 +2 +3
label
+0 +1 +2 +3
Rdest
b31 b0
label
+0 +1 +2 +3
Rdest
00 00 00
b31 b0
Memory Register
Figure 2.6.7 Transfer from Memory (Signed) to Registers
(6) Transfer from memory (unsigned) to registers
Figure 2.6.8 Transfer from Memory (Unsigned) to Registers