Renesas M32R/ECU Series User Manual page 49

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