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[Qemu-devel] [PATCH v2 12/22] target-mips: add ALIGN, DALIGN, BITSWAP an
From: |
Leon Alrae |
Subject: |
[Qemu-devel] [PATCH v2 12/22] target-mips: add ALIGN, DALIGN, BITSWAP and DBITSWAP instructions |
Date: |
Wed, 11 Jun 2014 16:19:42 +0100 |
From: Yongbok Kim <address@hidden>
Signed-off-by: Yongbok Kim <address@hidden>
Signed-off-by: Leon Alrae <address@hidden>
---
v2:
* have separate bitswap and dbitswap helpers and use common function
* use TCG_CALL_NO_RWG_SE flag for bitswap and dbitswap helpers
* remove useless shift in ALIGN and DALIGN
* improve ALIGN implementation by merging rt and rs into 64-bit register
* add missing zero register case
---
disas/mips.c | 4 ++
target-mips/helper.h | 5 ++
target-mips/op_helper.c | 24 +++++++++
target-mips/translate.c | 122 ++++++++++++++++++++++++++++++++++++++++++-----
4 files changed, 143 insertions(+), 12 deletions(-)
diff --git a/disas/mips.c b/disas/mips.c
index 8cb9032..127a7d5 100644
--- a/disas/mips.c
+++ b/disas/mips.c
@@ -1246,6 +1246,10 @@ const struct mips_opcode mips_builtin_opcodes[] =
{"cache", "k,o(b)", 0x7c000025, 0xfc00003f, RD_b, 0,
I32R6},
{"seleqz", "d,v,t", 0x00000035, 0xfc0007ff, WR_d|RD_s|RD_t, 0,
I32R6},
{"selnez", "d,v,t", 0x00000037, 0xfc0007ff, WR_d|RD_s|RD_t, 0,
I32R6},
+{"align", "d,v,t", 0x7c000220, 0xfc00073f, WR_d|RD_s|RD_t, 0,
I32R6},
+{"dalign", "d,v,t", 0x7c000224, 0xfc00063f, WR_d|RD_s|RD_t, 0,
I64R6},
+{"bitswap", "d,w", 0x7c000020, 0xffe007ff, WR_d|RD_t, 0,
I32R6},
+{"dbitswap","d,w", 0x7c000024, 0xffe007ff, WR_d|RD_t, 0,
I64R6},
{"pref", "k,o(b)", 0xcc000000, 0xfc000000, RD_b, 0,
I4|I32|G3 },
{"prefx", "h,t(b)", 0x4c00000f, 0xfc0007ff, RD_b|RD_t, 0,
I4|I33 },
{"nop", "", 0x00000000, 0xffffffff, 0,
INSN2_ALIAS, I1 }, /* sll */
diff --git a/target-mips/helper.h b/target-mips/helper.h
index 74ef094..5511dfc 100644
--- a/target-mips/helper.h
+++ b/target-mips/helper.h
@@ -39,6 +39,11 @@ DEF_HELPER_3(macchiu, tl, env, tl, tl)
DEF_HELPER_3(msachi, tl, env, tl, tl)
DEF_HELPER_3(msachiu, tl, env, tl, tl)
+DEF_HELPER_FLAGS_1(bitswap, TCG_CALL_NO_RWG_SE, tl, tl)
+#ifdef TARGET_MIPS64
+DEF_HELPER_FLAGS_1(dbitswap, TCG_CALL_NO_RWG_SE, tl, tl)
+#endif
+
#ifndef CONFIG_USER_ONLY
/* CP0 helpers */
DEF_HELPER_1(mfc0_mvpcontrol, tl, env)
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c
index 4704216..34e9823 100644
--- a/target-mips/op_helper.c
+++ b/target-mips/op_helper.c
@@ -265,6 +265,30 @@ target_ulong helper_mulshiu(CPUMIPSState *env,
target_ulong arg1,
(uint64_t)(uint32_t)arg2);
}
+static inline target_ulong bitswap(target_ulong v)
+{
+ v = ((v >> 1) & (target_ulong)0x5555555555555555) |
+ ((v & (target_ulong)0x5555555555555555) << 1);
+ v = ((v >> 2) & (target_ulong)0x3333333333333333) |
+ ((v & (target_ulong)0x3333333333333333) << 2);
+ v = ((v >> 4) & (target_ulong)0x0F0F0F0F0F0F0F0F) |
+ ((v & (target_ulong)0x0F0F0F0F0F0F0F0F) << 4);
+ return v;
+}
+
+
+#ifdef TARGET_MIPS64
+target_ulong helper_dbitswap(target_ulong rt)
+{
+ return bitswap(rt);
+}
+#endif
+
+target_ulong helper_bitswap(target_ulong rt)
+{
+ return (int32_t)bitswap(rt);
+}
+
#ifndef CONFIG_USER_ONLY
static inline hwaddr do_translate_address(CPUMIPSState *env,
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 363b178..270e7d3 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -390,17 +390,23 @@ enum {
#define MASK_BSHFL(op) MASK_SPECIAL3(op) | (op & (0x1F << 6))
enum {
- OPC_WSBH = (0x02 << 6) | OPC_BSHFL,
- OPC_SEB = (0x10 << 6) | OPC_BSHFL,
- OPC_SEH = (0x18 << 6) | OPC_BSHFL,
+ OPC_WSBH = (0x02 << 6) | OPC_BSHFL,
+ OPC_SEB = (0x10 << 6) | OPC_BSHFL,
+ OPC_SEH = (0x18 << 6) | OPC_BSHFL,
+ OPC_ALIGN = (0x08 << 6) | OPC_BSHFL, /* 010.bp */
+ OPC_ALIGN_END = (0x0B << 6) | OPC_BSHFL, /* 010.00 to 010.11 */
+ OPC_BITSWAP = (0x00 << 6) | OPC_BSHFL /* 00000 */
};
/* DBSHFL opcodes */
#define MASK_DBSHFL(op) MASK_SPECIAL3(op) | (op & (0x1F << 6))
enum {
- OPC_DSBH = (0x02 << 6) | OPC_DBSHFL,
- OPC_DSHD = (0x05 << 6) | OPC_DBSHFL,
+ OPC_DSBH = (0x02 << 6) | OPC_DBSHFL,
+ OPC_DSHD = (0x05 << 6) | OPC_DBSHFL,
+ OPC_DALIGN = (0x08 << 6) | OPC_DBSHFL, /* 01.bp */
+ OPC_DALIGN_END = (0x0F << 6) | OPC_DBSHFL, /* 01.000 to 01.111 */
+ OPC_DBITSWAP = (0x00 << 6) | OPC_DBSHFL, /* 00000 */
};
/* MIPS DSP REGIMM opcodes */
@@ -15111,12 +15117,14 @@ static void decode_opc_special2_legacy(CPUMIPSState
*env, DisasContext *ctx)
static void decode_opc_special3_r6(CPUMIPSState *env, DisasContext *ctx)
{
- int rs, rt;
- uint32_t op1;
+ int rs, rt, rd, sa;
+ uint32_t op1, op2;
int16_t imm;
rs = (ctx->opcode >> 21) & 0x1f;
rt = (ctx->opcode >> 16) & 0x1f;
+ rd = (ctx->opcode >> 11) & 0x1f;
+ sa = (ctx->opcode >> 6) & 0x1f;
imm = (int16_t)ctx->opcode >> 7;
op1 = MASK_SPECIAL3(ctx->opcode);
@@ -15137,6 +15145,44 @@ static void decode_opc_special3_r6(CPUMIPSState *env,
DisasContext *ctx)
case R6_OPC_LL:
gen_ld(ctx, op1, rt, rs, imm);
break;
+ case OPC_BSHFL:
+ if (rd == 0) {
+ /* Treat as NOP. */
+ break;
+ }
+ op2 = MASK_BSHFL(ctx->opcode);
+ switch (op2) {
+ case OPC_ALIGN ... OPC_ALIGN_END:
+ sa &= 3;
+ TCGv t0 = tcg_temp_new();
+ gen_load_gpr(t0, rt);
+ if (sa == 0) {
+ tcg_gen_mov_tl(cpu_gpr[rd], t0);
+ } else {
+ TCGv t1 = tcg_temp_new();
+ TCGv_i64 t2 = tcg_temp_new_i64();
+ gen_load_gpr(t1, rs);
+ tcg_gen_concat_tl_i64(t2, t1, t0);
+ tcg_gen_shri_i64(t2, t2, 8 * (4 - sa));
+#if defined(TARGET_MIPS64)
+ tcg_gen_ext32s_i64(cpu_gpr[rd], t2);
+#else
+ tcg_gen_trunc_i64_i32(cpu_gpr[rd], t2);
+#endif
+ tcg_temp_free_i64(t2);
+ tcg_temp_free(t1);
+ }
+ tcg_temp_free(t0);
+ break;
+ case OPC_BITSWAP:
+ if (rt == 0) {
+ tcg_gen_movi_tl(cpu_gpr[rd], 0);
+ } else {
+ gen_helper_bitswap(cpu_gpr[rd], cpu_gpr[rt]);
+ }
+ break;
+ }
+ break;
#if defined(TARGET_MIPS64)
case R6_OPC_SCD:
gen_st_cond(ctx, op1, rt, rs, imm);
@@ -15144,6 +15190,39 @@ static void decode_opc_special3_r6(CPUMIPSState *env,
DisasContext *ctx)
case R6_OPC_LLD:
gen_ld(ctx, op1, rt, rs, imm);
break;
+ case OPC_DBSHFL:
+ if (rd == 0) {
+ /* Treat as NOP. */
+ break;
+ }
+ op2 = MASK_DBSHFL(ctx->opcode);
+ switch (op2) {
+ case OPC_DALIGN ... OPC_DALIGN_END:
+ sa &= 7;
+ check_mips_64(ctx);
+ TCGv t0 = tcg_temp_new();
+ gen_load_gpr(t0, rt);
+ if (sa == 0) {
+ tcg_gen_mov_tl(cpu_gpr[rd], t0);
+ } else {
+ TCGv t1 = tcg_temp_new();
+ gen_load_gpr(t1, rs);
+ tcg_gen_shli_tl(t0, t0, 8 * sa);
+ tcg_gen_shri_tl(t1, t1, 8 * (8 - sa));
+ tcg_gen_or_tl(cpu_gpr[rd], t1, t0);
+ tcg_temp_free(t1);
+ }
+ tcg_temp_free(t0);
+ break;
+ case OPC_DBITSWAP:
+ if (rt == 0) {
+ tcg_gen_movi_tl(cpu_gpr[rd], 0);
+ } else {
+ gen_helper_dbitswap(cpu_gpr[rd], cpu_gpr[rt]);
+ }
+ break;
+ }
+ break;
#endif
default: /* Invalid */
MIPS_INVAL("special3_r6");
@@ -15689,9 +15768,18 @@ static void decode_opc_special3(CPUMIPSState *env,
DisasContext *ctx)
gen_bitops(ctx, op1, rt, rs, sa, rd);
break;
case OPC_BSHFL:
- check_insn(ctx, ISA_MIPS32R2);
op2 = MASK_BSHFL(ctx->opcode);
- gen_bshfl(ctx, op2, rt, rd);
+ switch (op2) {
+ case OPC_ALIGN ... OPC_ALIGN_END:
+ case OPC_BITSWAP:
+ check_insn(ctx, ISA_MIPS32R6);
+ decode_opc_special3_r6(env, ctx);
+ break;
+ default:
+ check_insn(ctx, ISA_MIPS32R2);
+ gen_bshfl(ctx, op2, rt, rd);
+ break;
+ }
break;
#if defined(TARGET_MIPS64)
case OPC_DEXTM ... OPC_DEXT:
@@ -15701,10 +15789,20 @@ static void decode_opc_special3(CPUMIPSState *env,
DisasContext *ctx)
gen_bitops(ctx, op1, rt, rs, sa, rd);
break;
case OPC_DBSHFL:
- check_insn(ctx, ISA_MIPS64R2);
- check_mips_64(ctx);
op2 = MASK_DBSHFL(ctx->opcode);
- gen_bshfl(ctx, op2, rt, rd);
+ switch (op2) {
+ case OPC_DALIGN ... OPC_DALIGN_END:
+ case OPC_DBITSWAP:
+ check_insn(ctx, ISA_MIPS32R6);
+ decode_opc_special3_r6(env, ctx);
+ break;
+ default:
+ check_insn(ctx, ISA_MIPS64R2);
+ check_mips_64(ctx);
+ op2 = MASK_DBSHFL(ctx->opcode);
+ gen_bshfl(ctx, op2, rt, rd);
+ break;
+ }
break;
#endif
case OPC_RDHWR:
--
1.7.5.4
- [Qemu-devel] [PATCH v2 10/22] target-mips: move CLO, DCLO, CLZ, DCLZ, SDBBP and free special2 in R6, (continued)
- [Qemu-devel] [PATCH v2 10/22] target-mips: move CLO, DCLO, CLZ, DCLZ, SDBBP and free special2 in R6, Leon Alrae, 2014/06/11
- [Qemu-devel] [PATCH v2 05/22] target-mips: extract decode_opc_special* from decode_opc, Leon Alrae, 2014/06/11
- [Qemu-devel] [PATCH v2 11/22] target-mips: Status.UX/SX/KX enable 32-bit address wrapping, Leon Alrae, 2014/06/11
- [Qemu-devel] [PATCH v2 09/22] target-mips: redefine Integer Multiply and Divide instructions, Leon Alrae, 2014/06/11
- [Qemu-devel] [PATCH v2 13/22] target-mips: add Compact Branches, Leon Alrae, 2014/06/11
- [Qemu-devel] [PATCH v2 12/22] target-mips: add ALIGN, DALIGN, BITSWAP and DBITSWAP instructions,
Leon Alrae <=
- Re: [Qemu-devel] [PATCH v2 12/22] target-mips: add ALIGN, DALIGN, BITSWAP and DBITSWAP instructions, Aurelien Jarno, 2014/06/19
- [Qemu-devel] [PATCH v2 14/22] target-mips: add Addressing and PC-relative instructions, Leon Alrae, 2014/06/11