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target/arm: Implement MIN/MAX (immediate)

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250803014019.416797-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2025-08-26 11:21:29 +01:00 • committed by Peter Maydell
parent 3b53af353b
commit d0e4b9d4d7
2 changed files with 54 additions and 0 deletions
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10
target/arm/tcg/a64.decode
View file

@ -156,6 +156,16 @@ MOVZ . 10 100101 .. ................ ..... @movw_32
MOVK . 11 100101 .. ................ ..... @movw_64
MOVK . 11 100101 .. ................ ..... @movw_32
# Min/Max (immediate)
@minmaxi_s sf:1 .. ........... imm:s8 rn:5 rd:5 &rri_sf
@minmaxi_u sf:1 .. ........... imm:8 rn:5 rd:5 &rri_sf
SMAX_i . 00 1000111 0000 ........ ..... ..... @minmaxi_s
SMIN_i . 00 1000111 0010 ........ ..... ..... @minmaxi_s
UMAX_i . 00 1000111 0001 ........ ..... ..... @minmaxi_u
UMIN_i . 00 1000111 0011 ........ ..... ..... @minmaxi_u
# Bitfield
&bitfield rd rn sf immr imms

44
target/arm/tcg/translate-a64.c
View file

@ -4552,6 +4552,50 @@ TRANS(SUB_i, gen_rri, a, 1, 1, tcg_gen_sub_i64)
TRANS(ADDS_i, gen_rri, a, 0, 1, a->sf ? gen_add64_CC : gen_add32_CC)
TRANS(SUBS_i, gen_rri, a, 0, 1, a->sf ? gen_sub64_CC : gen_sub32_CC)
/*
* Min/Max (immediate)
*/
static void gen_wrap3_i32(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m, NeonGenTwoOpFn fn)
{
TCGv_i32 t1 = tcg_temp_new_i32();
TCGv_i32 t2 = tcg_temp_new_i32();
tcg_gen_extrl_i64_i32(t1, n);
tcg_gen_extrl_i64_i32(t2, m);
fn(t1, t1, t2);
tcg_gen_extu_i32_i64(d, t1);
}
static void gen_smax32_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m)
{
gen_wrap3_i32(d, n, m, tcg_gen_smax_i32);
}
static void gen_smin32_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m)
{
gen_wrap3_i32(d, n, m, tcg_gen_smin_i32);
}
static void gen_umax32_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m)
{
gen_wrap3_i32(d, n, m, tcg_gen_umax_i32);
}
static void gen_umin32_i64(TCGv_i64 d, TCGv_i64 n, TCGv_i64 m)
{
gen_wrap3_i32(d, n, m, tcg_gen_umin_i32);
}
TRANS_FEAT(SMAX_i, aa64_cssc, gen_rri, a, 0, 0,
a->sf ? tcg_gen_smax_i64 : gen_smax32_i64)
TRANS_FEAT(SMIN_i, aa64_cssc, gen_rri, a, 0, 0,
a->sf ? tcg_gen_smin_i64 : gen_smin32_i64)
TRANS_FEAT(UMAX_i, aa64_cssc, gen_rri, a, 0, 0,
a->sf ? tcg_gen_umax_i64 : gen_umax32_i64)
TRANS_FEAT(UMIN_i, aa64_cssc, gen_rri, a, 0, 0,
a->sf ? tcg_gen_umin_i64 : gen_umin32_i64)
/*
* Add/subtract (immediate, with tags)
*/