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target/riscv: add gen_shifti() and gen_shiftiw() helper functions

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Add gen_shifti() and gen_shiftiw() helper functions to reuse the same
interfaces for immediate shift instructions.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210505160620.15723-9-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2021-05-06 00:06:09 +08:00 committed by Alistair Francis
parent 2a81973829
commit 981d3568df
2 changed files with 43 additions and 50 deletions
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54
target/riscv/insn_trans/trans_rvi.c.inc
View file

@ -268,54 +268,17 @@ static bool trans_andi(DisasContext *ctx, arg_andi *a)
}
static bool trans_slli(DisasContext *ctx, arg_slli *a)
{
if (a->shamt >= TARGET_LONG_BITS) {
return false;
}
if (a->rd != 0) {
TCGv t = tcg_temp_new();
gen_get_gpr(t, a->rs1);
tcg_gen_shli_tl(t, t, a->shamt);
gen_set_gpr(a->rd, t);
tcg_temp_free(t);
} /* NOP otherwise */
return true;
return gen_shifti(ctx, a, tcg_gen_shl_tl);
}
static bool trans_srli(DisasContext *ctx, arg_srli *a)
{
if (a->shamt >= TARGET_LONG_BITS) {
return false;
}
if (a->rd != 0) {
TCGv t = tcg_temp_new();
gen_get_gpr(t, a->rs1);
tcg_gen_shri_tl(t, t, a->shamt);
gen_set_gpr(a->rd, t);
tcg_temp_free(t);
} /* NOP otherwise */
return true;
return gen_shifti(ctx, a, tcg_gen_shr_tl);
}
static bool trans_srai(DisasContext *ctx, arg_srai *a)
{
if (a->shamt >= TARGET_LONG_BITS) {
return false;
}
if (a->rd != 0) {
TCGv t = tcg_temp_new();
gen_get_gpr(t, a->rs1);
tcg_gen_sari_tl(t, t, a->shamt);
gen_set_gpr(a->rd, t);
tcg_temp_free(t);
} /* NOP otherwise */
return true;
return gen_shifti(ctx, a, tcg_gen_sar_tl);
}
static bool trans_add(DisasContext *ctx, arg_add *a)
@ -377,16 +340,7 @@ static bool trans_addiw(DisasContext *ctx, arg_addiw *a)
static bool trans_slliw(DisasContext *ctx, arg_slliw *a)
{
REQUIRE_64BIT(ctx);
TCGv source1;
source1 = tcg_temp_new();
gen_get_gpr(source1, a->rs1);
tcg_gen_shli_tl(source1, source1, a->shamt);
tcg_gen_ext32s_tl(source1, source1);
gen_set_gpr(a->rd, source1);
tcg_temp_free(source1);
return true;
return gen_shiftiw(ctx, a, tcg_gen_shl_tl);
}
static bool trans_srliw(DisasContext *ctx, arg_srliw *a)

39
target/riscv/translate.c
View file

@ -652,6 +652,45 @@ static uint32_t opcode_at(DisasContextBase *dcbase, target_ulong pc)
return cpu_ldl_code(env, pc);
}
static bool gen_shifti(DisasContext *ctx, arg_shift *a,
void(*func)(TCGv, TCGv, TCGv))
{
if (a->shamt >= TARGET_LONG_BITS) {
return false;
}
TCGv source1 = tcg_temp_new();
TCGv source2 = tcg_temp_new();
gen_get_gpr(source1, a->rs1);
tcg_gen_movi_tl(source2, a->shamt);
(*func)(source1, source1, source2);
gen_set_gpr(a->rd, source1);
tcg_temp_free(source1);
tcg_temp_free(source2);
return true;
}
static bool gen_shiftiw(DisasContext *ctx, arg_shift *a,
void(*func)(TCGv, TCGv, TCGv))
{
TCGv source1 = tcg_temp_new();
TCGv source2 = tcg_temp_new();
gen_get_gpr(source1, a->rs1);
tcg_gen_movi_tl(source2, a->shamt);
(*func)(source1, source1, source2);
tcg_gen_ext32s_tl(source1, source1);
gen_set_gpr(a->rd, source1);
tcg_temp_free(source1);
tcg_temp_free(source2);
return true;
}
static void gen_ctz(TCGv ret, TCGv arg1)
{
tcg_gen_ctzi_tl(ret, arg1, TARGET_LONG_BITS);