Renesas M32R/ECU Series

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
b31b0
+0 +1 +2
+3
Rdest
label
00 00
FF FF
Determined by MSB
b31b0
+0 +1 +2 +3
Rdest
label
00 00 00
FF FF FF
b31b0
+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
b31b0
label
+0 +1 +2 +3
label
+0 +1 +2 +3
Rdest
b31b0
label
+0 +1 +2 +3
Rdest
00 00 00
b31b0
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