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| author | Andrew Waterman <andrew@sifive.com> | 2024-04-30 15:31:33 -0700 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2024-04-30 15:31:33 -0700 |
| commit | b190bef030ac8fbd6b90686eddada68c12e8fa45 (patch) | |
| tree | 24e2902e7df784bc28a67995f29a2d160c35e6d2 | |
| parent | fb9d13a695bbeae38e97a288fabdae87a6d972f9 (diff) | |
| download | pk-b190bef030ac8fbd6b90686eddada68c12e8fa45.zip pk-b190bef030ac8fbd6b90686eddada68c12e8fa45.tar.gz pk-b190bef030ac8fbd6b90686eddada68c12e8fa45.tar.bz2 | |
Support emulation of misaligned FLH/FSH
| -rw-r--r-- | machine/misaligned_ldst.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/machine/misaligned_ldst.c b/machine/misaligned_ldst.c index a421672..bc3e876 100644 --- a/machine/misaligned_ldst.c +++ b/machine/misaligned_ldst.c @@ -10,6 +10,7 @@ union byte_array { uint8_t bytes[8]; uintptr_t intx; + uint16_t int16; uint32_t int32; uint64_t int64; }; @@ -36,6 +37,8 @@ void misaligned_load_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc) fp = 1, len = 8; else if ((insn & MASK_FLW) == MATCH_FLW) fp = 1, len = 4; + else if ((insn & MASK_FLH) == MATCH_FLH) + fp = 1, len = 2; #endif else if ((insn & MASK_LH) == MATCH_LH) len = 2, shift = 8*(sizeof(uintptr_t) - len); @@ -83,8 +86,10 @@ void misaligned_load_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc) #endif else if (len == 8) SET_F64_RD(insn, regs, val.int64); - else + else if (len == 4) SET_F32_RD(insn, regs, val.int32); + else + SET_F32_RD(insn, regs, val.int16 | 0xffff0000U); write_csr(mepc, npc); } @@ -109,6 +114,8 @@ void misaligned_store_trap(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc) len = 8, val.int64 = GET_F64_RS2(insn, regs); else if ((insn & MASK_FSW) == MATCH_FSW) len = 4, val.intx = GET_F32_RS2(insn, regs); + else if ((insn & MASK_FSH) == MATCH_FSH) + len = 2, val.intx = GET_F32_RS2(insn, regs); #endif else if ((insn & MASK_SH) == MATCH_SH) len = 2; |