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| author | Kartik Agaram <vc@akkartik.com> | 2020-06-13 20:23:51 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-06-13 20:23:51 -0700 |
| commit | ef845524e90c736b6cbab9320bc41114d421ff63 (patch) | |
| tree | cd9d0e11b1cba8fa035340e697ee0fa9ca0ae0e2 /mu_instructions | |
| parent | 7e55a20ff4c9bdb64b55daddd551f19cd7a51bcb (diff) | |
| download | mu-ef845524e90c736b6cbab9320bc41114d421ff63.tar.gz | |
6516 - operations on bytes
Byte-oriented addressing is only supported in a couple of instructions in SubX. As a result, variables of type 'byte' can't live on the stack, or in registers 'esi' and 'edi'.
Diffstat (limited to 'mu_instructions')
| -rw-r--r-- | mu_instructions | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mu_instructions b/mu_instructions index 5ce9e07c..7b38a1f8 100644 --- a/mu_instructions +++ b/mu_instructions @@ -90,6 +90,10 @@ var/reg <- copy n => "c7 0/subop/copy %" reg " " n "/imm32" copy-to var, n => "c7 0/subop/copy *(ebp+" var.stack-offset ") " n "/imm32" copy-to *var/reg, n => "c7 0/subop/copy *" reg " " n "/imm32" +var/reg <- copy-byte var2/reg2 => "8a/byte-> %" reg2 " " reg "/r32" +var/reg <- copy-byte *var2/reg2 => "8a/byte-> *" reg2 " " reg "/r32" +copy-byte-to *var1/reg1, var2/reg2 => "88/byte<- *" reg1 " " reg2 "/r32" + compare var1, var2/reg2 => "39/compare *(ebp+" var1.stack-offset ") " reg2 "/r32" compare *var1/reg1, var2/reg2 => "39/compare *" reg1 " " reg2 "/r32" compare var1/reg1, var2 => "3b/compare<- *(ebp+" var2.stack-offset ") " reg1 "/r32" |