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#include "fp_emulation.h"
#include "unprivileged_memory.h"
DECLARE_EMULATION_FUNC(emulate_float_load)
{
uint64_t val;
uintptr_t addr = GET_RS1(insn, regs) + IMM_I(insn);
switch (insn & MASK_FUNCT3)
{
case MATCH_FLW & MASK_FUNCT3:
if (addr % 4 != 0)
return misaligned_load_trap(regs, mcause, mepc);
SET_F32_RD(insn, regs, load_int32_t((void *)addr, mepc));
break;
case MATCH_FLD & MASK_FUNCT3:
if (addr % sizeof(uintptr_t) != 0)
return misaligned_load_trap(regs, mcause, mepc);
#if __riscv_xlen == 64
val = load_uint64_t((void *)addr, mepc);
#else
val = load_uint32_t((void *)addr, mepc);
val += (uint64_t)load_uint32_t((void *)(addr + 4), mepc) << 32;
#endif
SET_F64_RD(insn, regs, val);
break;
default:
return truly_illegal_insn(regs, mcause, mepc, mstatus, insn);
}
}
DECLARE_EMULATION_FUNC(emulate_float_store)
{
uint64_t val;
uintptr_t addr = GET_RS1(insn, regs) + IMM_S(insn);
switch (insn & MASK_FUNCT3)
{
case MATCH_FSW & MASK_FUNCT3:
if (addr % 4 != 0)
return misaligned_store_trap(regs, mcause, mepc);
store_uint32_t((void *)addr, GET_F32_RS2(insn, regs), mepc);
break;
case MATCH_FSD & MASK_FUNCT3:
if (addr % sizeof(uintptr_t) != 0)
return misaligned_store_trap(regs, mcause, mepc);
val = GET_F64_RS2(insn, regs);
#if __riscv_xlen == 64
store_uint64_t((void *)addr, val, mepc);
#else
store_uint32_t((void *)addr, val, mepc);
store_uint32_t((void *)(addr + 4), val >> 32, mepc);
#endif
break;
default:
return truly_illegal_insn(regs, mcause, mepc, mstatus, insn);
}
}
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