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target/riscv: rvb: add/shift with prefix zero-extend 

Signed-off-by: Kito Cheng <kito.cheng@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210505160620.15723-16-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Kito Cheng 2021-05-06 00:06:16 +08:00 committed by Alistair Francis
parent 920a1f9955
commit 3a4a43e4e2
3 changed files with 35 additions and 0 deletions
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3
target/riscv/insn32.decode
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@ -720,6 +720,7 @@ gorcw 0010100 .......... 101 ..... 0111011 @r
sh1add_uw 0010000 .......... 010 ..... 0111011 @r
sh2add_uw 0010000 .......... 100 ..... 0111011 @r
sh3add_uw 0010000 .......... 110 ..... 0111011 @r
add_uw 0000100 .......... 000 ..... 0111011 @r
bsetiw 0010100 .......... 001 ..... 0011011 @sh5
bclriw 0100100 .......... 001 ..... 0011011 @sh5
@ -729,3 +730,5 @@ sroiw 0010000 .......... 101 ..... 0011011 @sh5
roriw 0110000 .......... 101 ..... 0011011 @sh5
greviw 0110100 .......... 101 ..... 0011011 @sh5
gorciw 0010100 .......... 101 ..... 0011011 @sh5
slli_uw 00001. ........... 001 ..... 0011011 @sh

26
target/riscv/insn_trans/trans_rvb.c.inc
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@ -410,3 +410,29 @@ static bool trans_sh##SHAMT##add_uw(DisasContext *ctx, \
GEN_TRANS_SHADD_UW(1)
GEN_TRANS_SHADD_UW(2)
GEN_TRANS_SHADD_UW(3)
static bool trans_add_uw(DisasContext *ctx, arg_add_uw *a)
{
REQUIRE_64BIT(ctx);
REQUIRE_EXT(ctx, RVB);
return gen_arith(ctx, a, gen_add_uw);
}
static bool trans_slli_uw(DisasContext *ctx, arg_slli_uw *a)
{
REQUIRE_64BIT(ctx);
REQUIRE_EXT(ctx, RVB);
TCGv source1 = tcg_temp_new();
gen_get_gpr(source1, a->rs1);
if (a->shamt < 32) {
tcg_gen_deposit_z_tl(source1, source1, a->shamt, 32);
} else {
tcg_gen_shli_tl(source1, source1, a->shamt);
}
gen_set_gpr(a->rd, source1);
tcg_temp_free(source1);
return true;
}

6
target/riscv/translate.c
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@ -765,6 +765,12 @@ GEN_SHADD_UW(1)
GEN_SHADD_UW(2)
GEN_SHADD_UW(3)
static void gen_add_uw(TCGv ret, TCGv arg1, TCGv arg2)
{
tcg_gen_ext32u_tl(arg1, arg1);
tcg_gen_add_tl(ret, arg1, arg2);
}
static bool gen_arith(DisasContext *ctx, arg_r *a,
void(*func)(TCGv, TCGv, TCGv))
{