riscv/rocket-chip
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added ei and di instructions

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This commit is contained in:
Rimas Avizienis
2011-11-14 13:48:49 -08:00
parent b791010bb1
commit cd6e463320
4 changed files with 145 additions and 106 deletions
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12
rocket/src/main/scala/dpath_util.scala
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@ -53,6 +53,8 @@ class ioDpathPCR extends Bundle()
val pc = UFix(VADDR_BITS, 'input);
val badvaddr = UFix(VADDR_BITS, 'input);
val eret = Bool('input);
val ei = Bool('input);
val di = Bool('input);
val ptbr_wen = Bool('output);
val irq_timer = Bool('output);
val irq_ipi = Bool('output);
@ -125,7 +127,15 @@ class rocketDpathPCR extends Component
reg_epc <== io.pc;
reg_cause <== io.cause;
}
when (!io.exception && io.di) {
reg_status_et <== Bool(false);
}
when (!io.exception && io.ei) {
reg_status_et <== Bool(true);
}
when (!io.exception && io.eret) {
reg_status_s <== reg_status_ps;
reg_status_et <== Bool(true);