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target/mips: Add emulation of nanoMIPS 16-bit shift instructions

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Add emulation of nanoMIPS 16-bit shift instructions.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
This commit is contained in:
Yongbok Kim 2018-08-02 16:16:08 +02:00 committed by Aleksandar Markovic
parent 764371d24c
commit c46562fb2f
1 changed files with 15 additions and 0 deletions
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15
target/mips/translate.c
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@ -16765,6 +16765,21 @@ static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx)
case NM_P16_MV: case NM_P16_MV:
break; break;
case NM_P16_SHIFT: case NM_P16_SHIFT:
{
int shift = extract32(ctx->opcode, 0, 3);
uint32_t opc = 0;
shift = (shift == 0) ? 8 : shift;
switch (extract32(ctx->opcode, 3, 1)) {
case NM_SLL16:
opc = OPC_SLL;
break;
case NM_SRL16:
opc = OPC_SRL;
break;
}
gen_shift_imm(ctx, opc, rt, rs, shift);
}
break; break;
case NM_P16C: case NM_P16C:
break; break;