URL https://opencores.org/ocsvn/ion/ion/trunk

Subversion Repositories ion

[/] [ion/] [trunk/] [src/] [opcodes/] [opcodes.s] - Diff between revs 4 and 9

Rev 4	Rev 9
Line 60...	Line 60...
`ori $26, $26, 0x3c`	`ori $26, $26, 0x3c`
`jr $26`	`jr $26`
`nop`	`nop`

`.org 0x3c`	`.org 0x3c`
	`# FIXME assume exception is trap or break for the time being`
`InterruptVector: # Address=0x3c`	`InterruptVector: # Address=0x3c`
`mfc0 $26,$14 # C0_EPC=14 (Exception PC)`	`mfc0 $26,$14 # C0_EPC=14 (Exception PC)`
	`addi $26,$26,4 # skip trap instruction`
`jr $26`	`jr $26`
`add $4,$4,5`	`add $4,$4,5`

`StartTest:`	`StartTest:`
`mtc0 $0,$12 # disable interrupts`	`mtc0 $0,$12 # disable interrupts`
Line 707...	Line 709...

`break 0 # check if load instruction is aborted (@log)`	`break 0 # check if load instruction is aborted (@log)`
`lb $2,16($2)`	`lb $2,16($2)`

`break 0 # check if jump instruction is aborted (@log)`	`break 0 # check if jump instruction is aborted (@log)`
`j break_jump_test`	`j break_jump_test1`
`add $4,$4,5`	`add $4,$4,5`

`break_jump_test:`	`break_jump_test1:`
`add $4,$4,1 # make sure the jump shows in the log (@log)`	`add $4,$4,1 # make sure the jump shows in the log (@log)`

	`# TODO traps in delay slots not supported yet`
	`#j break_jump_test2# check if break works in delay slot of jump`
	`#break 0`
	`nop`
	`j break_continue`
	`nop`

	`break_jump_test2:`
	`add $4,$4,1`

	`break_continue:`
`sb $23,0($20)`	`sb $23,0($20)`
`sb $21,0($20)`	`sb $21,0($20)`
`.endif`	`.endif`

`#q: SYSCALL`	`#q: SYSCALL`