diff options
Diffstat (limited to 'arch/mips/math-emu/cp1emu.c')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index efe008846ed..aaf7c92f462 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -878,6 +878,10 @@ static inline int cop1_64bit(struct pt_regs *xcp) ctx->fpr[x & ~1] >> 32 << 32 | (u32)(si) : \ ctx->fpr[x & ~1] << 32 >> 32 | (u64)(si) << 32) +#define SIFROMHREG(si, x) ((si) = (int)(ctx->fpr[x] >> 32)) +#define SITOHREG(si, x) (ctx->fpr[x] = \ + ctx->fpr[x] << 32 >> 32 | (u64)(si) << 32) + #define DIFROMREG(di, x) ((di) = ctx->fpr[x & ~(cop1_64bit(xcp) == 0)]) #define DITOREG(di, x) (ctx->fpr[x & ~(cop1_64bit(xcp) == 0)] = (di)) @@ -1055,6 +1059,25 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx, break; #endif + case mfhc_op: + if (!cpu_has_mips_r2) + goto sigill; + + /* copregister rd -> gpr[rt] */ + if (MIPSInst_RT(ir) != 0) { + SIFROMHREG(xcp->regs[MIPSInst_RT(ir)], + MIPSInst_RD(ir)); + } + break; + + case mthc_op: + if (!cpu_has_mips_r2) + goto sigill; + + /* copregister rd <- gpr[rt] */ + SITOHREG(xcp->regs[MIPSInst_RT(ir)], MIPSInst_RD(ir)); + break; + case mfc_op: /* copregister rd -> gpr[rt] */ if (MIPSInst_RT(ir) != 0) { @@ -1263,6 +1286,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx, #endif default: +sigill: return SIGILL; } |