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target/loongarch: Add fixed point bit instruction translation 

This includes:
- EXT.W.{B/H}
- CL{O/Z}.{W/D}, CT{O/Z}.{W/D}
- BYTEPICK.{W/D}
- REVB.{2H/4H/2W/D}
- REVH.{2W/D}
- BITREV.{4B/8B}, BITREV.{W/D}
- BSTRINS.{W/D}, BSTRPICK.{W/D}
- MASKEQZ, MASKNEZ

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-7-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Song Gao 2022-06-06 20:42:56 +08:00 committed by Richard Henderson
parent 63cfcd47d7
commit ad08cb3f97
5 changed files with 277 additions and 0 deletions
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4
target/loongarch/helper.h
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@ -4,3 +4,7 @@
*/
DEF_HELPER_2(raise_exception, noreturn, env, i32)
DEF_HELPER_FLAGS_1(bitrev_w, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(bitrev_d, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(bitswap, TCG_CALL_NO_RWG_SE, tl, tl)

212
target/loongarch/insn_trans/trans_bit.c.inc Normal file
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@ -0,0 +1,212 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2021 Loongson Technology Corporation Limited
*/
static bool gen_rr(DisasContext *ctx, arg_rr *a,
DisasExtend src_ext, DisasExtend dst_ext,
void (*func)(TCGv, TCGv))
{
TCGv dest = gpr_dst(ctx, a->rd, dst_ext);
TCGv src1 = gpr_src(ctx, a->rj, src_ext);
func(dest, src1);
gen_set_gpr(a->rd, dest, dst_ext);
return true;
}
static void gen_bytepick_w(TCGv dest, TCGv src1, TCGv src2, target_long sa)
{
tcg_gen_concat_tl_i64(dest, src1, src2);
tcg_gen_sextract_i64(dest, dest, (32 - sa * 8), 32);
}
static void gen_bytepick_d(TCGv dest, TCGv src1, TCGv src2, target_long sa)
{
tcg_gen_extract2_i64(dest, src1, src2, (64 - sa * 8));
}
static void gen_bstrins(TCGv dest, TCGv src1,
unsigned int ls, unsigned int len)
{
tcg_gen_deposit_tl(dest, dest, src1, ls, len);
}
static bool gen_rr_ms_ls(DisasContext *ctx, arg_rr_ms_ls *a,
DisasExtend src_ext, DisasExtend dst_ext,
void (*func)(TCGv, TCGv, unsigned int, unsigned int))
{
TCGv dest = gpr_dst(ctx, a->rd, dst_ext);
TCGv src1 = gpr_src(ctx, a->rj, src_ext);
if (a->ls > a->ms) {
return false;
}
func(dest, src1, a->ls, a->ms - a->ls + 1);
gen_set_gpr(a->rd, dest, dst_ext);
return true;
}
static void gen_clz_w(TCGv dest, TCGv src1)
{
tcg_gen_clzi_tl(dest, src1, TARGET_LONG_BITS);
tcg_gen_subi_tl(dest, dest, TARGET_LONG_BITS - 32);
}
static void gen_clo_w(TCGv dest, TCGv src1)
{
tcg_gen_not_tl(dest, src1);
tcg_gen_ext32u_tl(dest, dest);
gen_clz_w(dest, dest);
}
static void gen_ctz_w(TCGv dest, TCGv src1)
{
tcg_gen_ori_tl(dest, src1, (target_ulong)MAKE_64BIT_MASK(32, 32));
tcg_gen_ctzi_tl(dest, dest, TARGET_LONG_BITS);
}
static void gen_cto_w(TCGv dest, TCGv src1)
{
tcg_gen_not_tl(dest, src1);
gen_ctz_w(dest, dest);
}
static void gen_clz_d(TCGv dest, TCGv src1)
{
tcg_gen_clzi_i64(dest, src1, TARGET_LONG_BITS);
}
static void gen_clo_d(TCGv dest, TCGv src1)
{
tcg_gen_not_tl(dest, src1);
gen_clz_d(dest, dest);
}
static void gen_ctz_d(TCGv dest, TCGv src1)
{
tcg_gen_ctzi_tl(dest, src1, TARGET_LONG_BITS);
}
static void gen_cto_d(TCGv dest, TCGv src1)
{
tcg_gen_not_tl(dest, src1);
gen_ctz_d(dest, dest);
}
static void gen_revb_2w(TCGv dest, TCGv src1)
{
tcg_gen_bswap64_i64(dest, src1);
tcg_gen_rotri_i64(dest, dest, 32);
}
static void gen_revb_2h(TCGv dest, TCGv src1)
{
TCGv mask = tcg_constant_tl(0x00FF00FF);
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
tcg_gen_shri_tl(t0, src1, 8);
tcg_gen_and_tl(t0, t0, mask);
tcg_gen_and_tl(t1, src1, mask);
tcg_gen_shli_tl(t1, t1, 8);
tcg_gen_or_tl(dest, t0, t1);
tcg_temp_free(t0);
tcg_temp_free(t1);
}
static void gen_revb_4h(TCGv dest, TCGv src1)
{
TCGv mask = tcg_constant_tl(0x00FF00FF00FF00FFULL);
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
tcg_gen_shri_tl(t0, src1, 8);
tcg_gen_and_tl(t0, t0, mask);
tcg_gen_and_tl(t1, src1, mask);
tcg_gen_shli_tl(t1, t1, 8);
tcg_gen_or_tl(dest, t0, t1);
tcg_temp_free(t0);
tcg_temp_free(t1);
}
static void gen_revh_2w(TCGv dest, TCGv src1)
{
TCGv_i64 t0 = tcg_temp_new_i64();
TCGv_i64 t1 = tcg_temp_new_i64();
TCGv_i64 mask = tcg_constant_i64(0x0000ffff0000ffffull);
tcg_gen_shri_i64(t0, src1, 16);
tcg_gen_and_i64(t1, src1, mask);
tcg_gen_and_i64(t0, t0, mask);
tcg_gen_shli_i64(t1, t1, 16);
tcg_gen_or_i64(dest, t1, t0);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
}
static void gen_revh_d(TCGv dest, TCGv src1)
{
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv mask = tcg_constant_tl(0x0000FFFF0000FFFFULL);
tcg_gen_shri_tl(t1, src1, 16);
tcg_gen_and_tl(t1, t1, mask);
tcg_gen_and_tl(t0, src1, mask);
tcg_gen_shli_tl(t0, t0, 16);
tcg_gen_or_tl(t0, t0, t1);
tcg_gen_rotri_tl(dest, t0, 32);
tcg_temp_free(t0);
tcg_temp_free(t1);
}
static void gen_maskeqz(TCGv dest, TCGv src1, TCGv src2)
{
TCGv zero = tcg_constant_tl(0);
tcg_gen_movcond_tl(TCG_COND_EQ, dest, src2, zero, zero, src1);
}
static void gen_masknez(TCGv dest, TCGv src1, TCGv src2)
{
TCGv zero = tcg_constant_tl(0);
tcg_gen_movcond_tl(TCG_COND_NE, dest, src2, zero, zero, src1);
}
TRANS(ext_w_h, gen_rr, EXT_NONE, EXT_NONE, tcg_gen_ext16s_tl)
TRANS(ext_w_b, gen_rr, EXT_NONE, EXT_NONE, tcg_gen_ext8s_tl)
TRANS(clo_w, gen_rr, EXT_NONE, EXT_NONE, gen_clo_w)
TRANS(clz_w, gen_rr, EXT_ZERO, EXT_NONE, gen_clz_w)
TRANS(cto_w, gen_rr, EXT_NONE, EXT_NONE, gen_cto_w)
TRANS(ctz_w, gen_rr, EXT_NONE, EXT_NONE, gen_ctz_w)
TRANS(clo_d, gen_rr, EXT_NONE, EXT_NONE, gen_clo_d)
TRANS(clz_d, gen_rr, EXT_NONE, EXT_NONE, gen_clz_d)
TRANS(cto_d, gen_rr, EXT_NONE, EXT_NONE, gen_cto_d)
TRANS(ctz_d, gen_rr, EXT_NONE, EXT_NONE, gen_ctz_d)
TRANS(revb_2h, gen_rr, EXT_NONE, EXT_SIGN, gen_revb_2h)
TRANS(revb_4h, gen_rr, EXT_NONE, EXT_NONE, gen_revb_4h)
TRANS(revb_2w, gen_rr, EXT_NONE, EXT_NONE, gen_revb_2w)
TRANS(revb_d, gen_rr, EXT_NONE, EXT_NONE, tcg_gen_bswap64_i64)
TRANS(revh_2w, gen_rr, EXT_NONE, EXT_NONE, gen_revh_2w)
TRANS(revh_d, gen_rr, EXT_NONE, EXT_NONE, gen_revh_d)
TRANS(bitrev_4b, gen_rr, EXT_ZERO, EXT_SIGN, gen_helper_bitswap)
TRANS(bitrev_8b, gen_rr, EXT_NONE, EXT_NONE, gen_helper_bitswap)
TRANS(bitrev_w, gen_rr, EXT_NONE, EXT_SIGN, gen_helper_bitrev_w)
TRANS(bitrev_d, gen_rr, EXT_NONE, EXT_NONE, gen_helper_bitrev_d)
TRANS(maskeqz, gen_rrr, EXT_NONE, EXT_NONE, EXT_NONE, gen_maskeqz)
TRANS(masknez, gen_rrr, EXT_NONE, EXT_NONE, EXT_NONE, gen_masknez)
TRANS(bytepick_w, gen_rrr_sa, EXT_NONE, EXT_NONE, gen_bytepick_w)
TRANS(bytepick_d, gen_rrr_sa, EXT_NONE, EXT_NONE, gen_bytepick_d)
TRANS(bstrins_w, gen_rr_ms_ls, EXT_NONE, EXT_NONE, gen_bstrins)
TRANS(bstrins_d, gen_rr_ms_ls, EXT_NONE, EXT_NONE, gen_bstrins)
TRANS(bstrpick_w, gen_rr_ms_ls, EXT_NONE, EXT_SIGN, tcg_gen_extract_tl)
TRANS(bstrpick_d, gen_rr_ms_ls, EXT_NONE, EXT_NONE, tcg_gen_extract_tl)

39
target/loongarch/insns.decode
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@ -14,13 +14,16 @@
# Argument sets
#
&r_i rd imm
&rr rd rj
&rrr rd rj rk
&rr_i rd rj imm
&rrr_sa rd rj rk sa
&rr_ms_ls rd rj ms ls
#
# Formats
#
@rr .... ........ ..... ..... rj:5 rd:5 &rr
@rrr .... ........ ..... rk:5 rj:5 rd:5 &rrr
@r_i20 .... ... imm:s20 rd:5 &r_i
@rr_ui5 .... ........ ..... imm:5 rj:5 rd:5 &rr_i
@ -29,6 +32,10 @@
@rr_ui12 .... ...... imm:12 rj:5 rd:5 &rr_i
@rr_i16 .... .. imm:s16 rj:5 rd:5 &rr_i
@rrr_sa2p1 .... ........ ... .. rk:5 rj:5 rd:5 &rrr_sa sa=%sa2p1
@rrr_sa2 .... ........ ... sa:2 rk:5 rj:5 rd:5 &rrr_sa
@rrr_sa3 .... ........ .. sa:3 rk:5 rj:5 rd:5 &rrr_sa
@rr_2bw .... ....... ms:5 . ls:5 rj:5 rd:5 &rr_ms_ls
@rr_2bd .... ...... ms:6 ls:6 rj:5 rd:5 &rr_ms_ls
#
# Fixed point arithmetic operation instruction
@ -99,3 +106,35 @@ srai_w 0000 00000100 10001 ..... ..... ..... @rr_ui5
srai_d 0000 00000100 1001 ...... ..... ..... @rr_ui6
rotri_w 0000 00000100 11001 ..... ..... ..... @rr_ui5
rotri_d 0000 00000100 1101 ...... ..... ..... @rr_ui6
#
# Fixed point bit operation instruction
#
ext_w_h 0000 00000000 00000 10110 ..... ..... @rr
ext_w_b 0000 00000000 00000 10111 ..... ..... @rr
clo_w 0000 00000000 00000 00100 ..... ..... @rr
clz_w 0000 00000000 00000 00101 ..... ..... @rr
cto_w 0000 00000000 00000 00110 ..... ..... @rr
ctz_w 0000 00000000 00000 00111 ..... ..... @rr
clo_d 0000 00000000 00000 01000 ..... ..... @rr
clz_d 0000 00000000 00000 01001 ..... ..... @rr
cto_d 0000 00000000 00000 01010 ..... ..... @rr
ctz_d 0000 00000000 00000 01011 ..... ..... @rr
revb_2h 0000 00000000 00000 01100 ..... ..... @rr
revb_4h 0000 00000000 00000 01101 ..... ..... @rr
revb_2w 0000 00000000 00000 01110 ..... ..... @rr
revb_d 0000 00000000 00000 01111 ..... ..... @rr
revh_2w 0000 00000000 00000 10000 ..... ..... @rr
revh_d 0000 00000000 00000 10001 ..... ..... @rr
bitrev_4b 0000 00000000 00000 10010 ..... ..... @rr
bitrev_8b 0000 00000000 00000 10011 ..... ..... @rr
bitrev_w 0000 00000000 00000 10100 ..... ..... @rr
bitrev_d 0000 00000000 00000 10101 ..... ..... @rr
bytepick_w 0000 00000000 100 .. ..... ..... ..... @rrr_sa2
bytepick_d 0000 00000000 11 ... ..... ..... ..... @rrr_sa3
maskeqz 0000 00000001 00110 ..... ..... ..... @rrr
masknez 0000 00000001 00111 ..... ..... ..... @rrr
bstrins_w 0000 0000011 ..... 0 ..... ..... ..... @rr_2bw
bstrpick_w 0000 0000011 ..... 1 ..... ..... ..... @rr_2bw
bstrins_d 0000 000010 ...... ...... ..... ..... @rr_2bd
bstrpick_d 0000 000011 ...... ...... ..... ..... @rr_2bd

21
target/loongarch/op_helper.c
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@ -19,3 +19,24 @@ void helper_raise_exception(CPULoongArchState *env, uint32_t exception)
{
do_raise_exception(env, exception, GETPC());
}
target_ulong helper_bitrev_w(target_ulong rj)
{
return (int32_t)revbit32(rj);
}
target_ulong helper_bitrev_d(target_ulong rj)
{
return revbit64(rj);
}
target_ulong helper_bitswap(target_ulong v)
{
v = ((v >> 1) & (target_ulong)0x5555555555555555ULL) |
((v & (target_ulong)0x5555555555555555ULL) << 1);
v = ((v >> 2) & (target_ulong)0x3333333333333333ULL) |
((v & (target_ulong)0x3333333333333333ULL) << 2);
v = ((v >> 4) & (target_ulong)0x0F0F0F0F0F0F0F0FULL) |
((v & (target_ulong)0x0F0F0F0F0F0F0F0FULL) << 4);
return v;
}

1
target/loongarch/translate.c
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@ -147,6 +147,7 @@ static void gen_set_gpr(int reg_num, TCGv t, DisasExtend dst_ext)
#include "decode-insns.c.inc"
#include "insn_trans/trans_arith.c.inc"
#include "insn_trans/trans_shift.c.inc"
#include "insn_trans/trans_bit.c.inc"
static void loongarch_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
{