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Merge pull request #150 from sp1187/brpt

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vr4300: Implement break instruction
This commit is contained in:
Mike Ryan 2020-05-27 14:41:16 -07:00 committed by GitHub
parent fe81d08ca2 fa73cbe0fe
commit 15cf44f36f
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 24 additions and 2 deletions
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14
vr4300/fault.c
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@ -469,7 +469,19 @@ void VR4300_SYSC(struct vr4300 *vr4300) {
vr4300_ex_fault(vr4300, VR4300_FAULT_SYSC);
vr4300_exception_prolog(vr4300, common, &cause, &status, &epc);
vr4300_exception_epilogue(vr4300, (cause & ~0xFF) | 0x20,
vr4300_exception_epilogue(vr4300, (cause & ~0xFF) | (8 << 2),
status, epc, 0x180);
}
// BRPT: Breakpoint exception
void VR4300_BRPT(struct vr4300 *vr4300) {
struct vr4300_latch *common = &vr4300->pipeline.exdc_latch.common;
uint32_t cause, status;
uint64_t epc;
vr4300_ex_fault(vr4300, VR4300_FAULT_BRPT);
vr4300_exception_prolog(vr4300, common, &cause, &status, &epc);
vr4300_exception_epilogue(vr4300, (cause & ~0xFF) | (9 << 2),
status, epc, 0x180);
}

1
vr4300/fault.h
View file

@ -25,6 +25,7 @@ enum vr4300_fault_id {
extern const char *vr4300_fault_mnemonics[NUM_VR4300_FAULTS];
cen64_cold void VR4300_BRPT(struct vr4300 *vr4300);
cen64_cold void VR4300_CPU(struct vr4300 *vr4300);
cen64_cold void VR4300_DADE(struct vr4300 *vr4300);
cen64_cold void VR4300_DCB(struct vr4300 *vr4300);

9
vr4300/functions.c
View file

@ -405,6 +405,15 @@ int VR4300_BGTZ_BGTZL_BLEZ_BLEZL(
return 0;
}
//
// BREAK
//
int VR4300_BREAK(struct vr4300 *vr4300,
uint32_t unused(iw), uint64_t unused(rs), uint64_t unused(rt)) {
VR4300_BRPT(vr4300);
return 1;
}
//
// CACHE
//

2
vr4300/opcodes_priv.h
View file

@ -54,7 +54,7 @@
#define BLTZAL VR4300_BUILD_OP(BLTZAL, BGEZAL_BGEZALL_BLTZAL_BLTZALL, INFO2(BRANCH, NEEDRS))
#define BLTZALL VR4300_BUILD_OP(BLTZALL, BGEZAL_BGEZALL_BLTZAL_BLTZALL, INFO2(BRANCH, NEEDRS))
#define BLTZL VR4300_BUILD_OP(BLTZL, BGEZ_BGEZL_BLTZ_BLTZL, INFO2(BRANCH, NEEDRS))
#define BREAK VR4300_BUILD_OP(BREAK, INVALID, INFO1(NONE))
#define BREAK VR4300_BUILD_OP(BREAK, BREAK, INFO1(NONE))
#define DADD VR4300_BUILD_OP(DADD, DADD_DSUB, INFO2(NEEDRS, NEEDRT))
#define DADDI VR4300_BUILD_OP(DADDI, DADDI_DSUBI, INFO1(NEEDRS))
#define DADDIU VR4300_BUILD_OP(DADDIU, DADDIU_DSUBIU, INFO1(NEEDRS))