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# # 一時的に lh sw のアライメントあってないアクセスは無効化している # .file "code.s" .option nopic .text .align 2 .globl main .type main, @function main: li a0, 0x80040000 li a1, 0x80880008 li a2, 0x08808880 j main2 end: li a7, 1 end2: j end2 main2: sw a1, 0(a0) # 0x50000に0x80880008をストアする fence iorw, iorw lw a3, 0(a0) # a3 <- 0x80880008 fence iorw, iorw add a7, a7, a3 # a7=0+0x80880008=0x80880008 fence iorw, iorw lh a3, 0(a0) # a3 <- 0x00000008 fence iorw, iorw add a7, a7, a3 # a7=0x80880008+0x00000008=0x80880010 #lh a3, 1(a0) # a3 <- 0xFFFF8800 #add a7, a7, a3 # a7=0x80880010+0xFFFF8800=0x80878810 fence iorw, iorw lh a3, 2(a0) # a3 <- 0xFFFF8088 fence iorw, iorw add a7, a7, a3 # a7=0x80878810+0xFFFF8088=0x80870898 fence iorw, iorw lb a3, 0(a0) # a3 <- 0x00000008 fence iorw, iorw add a7, a7, a3 # a7=0x80870898+0x00000008=0x808708A0 fence iorw, iorw lb a3, 1(a0) # a3 <- 0x00000000 fence iorw, iorw add a7, a7, a3 # a7=0x808708A0+0x00000000=0x808708A0 fence iorw, iorw lb a3, 2(a0) # a3 <- 0xFFFFFF88 fence iorw, iorw add a7, a7, a3 # a7=0x808708A0+0xFFFFFF88=0x80870828 fence iorw, iorw lb a3, 3(a0) # a3 <- 0xFFFFFF80 fence iorw, iorw add a7, a7, a3 # a7=0x80870828+0xFFFFFF80=0x808707A8 fence iorw, iorw lhu a3, 0(a0) # a3 <- 0x00000008 fence iorw, iorw add a7, a7, a3 # a7=0x808707A8+0x00000008=0x808707B0 #lhu a3, 1(a0) # a3 <- 0x00008800 #add a7, a7, a3 # a7=0x808707B0+0x00008800=0x80878FB0 fence iorw, iorw lhu a3, 2(a0) # a3 <- 0x00008088 fence iorw, iorw add a7, a7, a3 # a7=0x80878FB0+0x00008088=0x80881038 fence iorw, iorw lbu a3, 0(a0) # a3 <- 0x00000008 fence iorw, iorw add a7, a7, a3 # a7=0x80881038+0x00000008=0x80881040 fence iorw, iorw lbu a3, 1(a0) # a3 <- 0x00000000 fence iorw, iorw add a7, a7, a3 # a7=0x80881040+0x00000000=0x80881040 fence iorw, iorw lbu a3, 2(a0) # a3 <- 0x00000088 fence iorw, iorw add a7, a7, a3 # a7=0x80881040+0x00000088=0x808810C8 fence iorw, iorw lbu a3, 3(a0) # a3 <- 0x00000080 fence iorw, iorw add a7, a7, a3 # a7=0x808810C8+0x00000080=0x80881148 li a1, 0x0000FFFF # a1に0x0000FFFFをストアする fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sh a1, 0(a0) # 0x50000から16-bitに0xFFFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0x0000FFFF fence iorw, iorw add a7, a7, a4 # a7=0x80881148+0x0000FFFF=0x80891147 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw #sh a1, 1(a0) # 0x4001から16-bitに0xFFFFをストアする lw a4, 0(a0) # a4 <- 0x00FFFF00 fence iorw, iorw add a7, a7, a4 # a7=0x80891147+0x00FFFF00=0x81891047 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sh a1, 2(a0) # 0x4002から16-bitに0xFFFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0xFFFF0000 fence iorw, iorw add a7, a7, a4 # a7=0x81891047+0xFFFF0000=0x81881047 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sb a1, 0(a0) # 0x50000から8-bitに0xFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0x000000FF fence iorw, iorw add a7, a7, a4 # a7=0x81881047+0x000000FF=0x81881146 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sb a1, 1(a0) # 0x4001から8-bitに0xFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0x0000FF00 fence iorw, iorw add a7, a7, a4 # a7=0x81881146+0x0000FF00=0x81891046 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sb a1, 2(a0) # 0x4002から8-bitに0xFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0x00FF0000 fence iorw, iorw add a7, a7, a4 # a7=0x81891046+0x00FF0000=0x82881046 fence iorw, iorw sw a6, 0(a0) # 0x50000に0をストアする fence iorw, iorw sb a1, 3(a0) # 0x4003から8-bitに0xFFをストアする fence iorw, iorw lw a4, 0(a0) # a4 <- 0xFF000000 fence iorw, iorw add a7, a7, a4 # a7=0x82881046+0xFF000000=0x81881046 main3: ret #j main3 # ここでループして終了