From: Philippe Mathieu-Daudé <f4bug@amsat.org>
Convert the following opcodes to decodetree:
- MULT.G - multiply 32-bit signed integers
- MULTU.G - multiply 32-bit unsigned integers
- DMULT.G - multiply 64-bit signed integers
- DMULTU.G - multiply 64-bit unsigned integers
Now that all opcodes from the extension have been converted, we
can remove completely gen_loongson_integer() and its 2 calls in
decode_opc_special2_legacy() and decode_opc_special3_legacy().
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
target/mips/tcg/godson2.decode | 3 ++
target/mips/tcg/loong-ext.decode | 3 ++
target/mips/tcg/loong_translate.c | 41 +++++++++++++++++
target/mips/tcg/translate.c | 73 +------------------------------
4 files changed, 49 insertions(+), 71 deletions(-)
diff --git a/target/mips/tcg/godson2.decode b/target/mips/tcg/godson2.decode
index c03c8b717d9..25b396b6822 100644
--- a/target/mips/tcg/godson2.decode
+++ b/target/mips/tcg/godson2.decode
@@ -13,6 +13,9 @@
@rs_rt_rd ...... rs:5 rt:5 rd:5 ..... ...... &muldiv
+MULTu_G 011111 ..... ..... ..... 00000 01100- @rs_rt_rd
+DMULTu_G 011111 ..... ..... ..... 00000 01110- @rs_rt_rd
+
DIV_G 011111 ..... ..... ..... 00000 011010 @rs_rt_rd
DIVU_G 011111 ..... ..... ..... 00000 011011 @rs_rt_rd
DDIV_G 011111 ..... ..... ..... 00000 011110 @rs_rt_rd
diff --git a/target/mips/tcg/loong-ext.decode b/target/mips/tcg/loong-ext.decode
index f0fd36c9218..b43979d0ef5 100644
--- a/target/mips/tcg/loong-ext.decode
+++ b/target/mips/tcg/loong-ext.decode
@@ -14,6 +14,9 @@
@rs_rt_rd ...... rs:5 rt:5 rd:5 ..... ...... &muldiv
+MULTu_G 011100 ..... ..... ..... 00000 0100-0 @rs_rt_rd
+DMULTu_G 011100 ..... ..... ..... 00000 0100-1 @rs_rt_rd
+
DIV_G 011100 ..... ..... ..... 00000 010100 @rs_rt_rd
DDIV_G 011100 ..... ..... ..... 00000 010101 @rs_rt_rd
DIVU_G 011100 ..... ..... ..... 00000 010110 @rs_rt_rd
diff --git a/target/mips/tcg/loong_translate.c b/target/mips/tcg/loong_translate.c
index 76c1a8cef2d..c02e60bb15b 100644
--- a/target/mips/tcg/loong_translate.c
+++ b/target/mips/tcg/loong_translate.c
@@ -252,6 +252,47 @@ static bool trans_DMODU_G(DisasContext *s, arg_muldiv *a)
return gen_lext_MODU_G(s, a->rt, a->rs, a->rd, true);
}
+static bool gen_lext_MULT_G(DisasContext *s, int rd, int rs, int rt,
+ bool is_double)
+{
+ TCGv t0, t1;
+
+ if (is_double) {
+ if (TARGET_LONG_BITS != 64) {
+ return false;
+ }
+ check_mips_64(s);
+ }
+
+ if (rd == 0) {
+ /* Treat as NOP. */
+ return true;
+ }
+
+ t0 = tcg_temp_new();
+ t1 = tcg_temp_new();
+
+ gen_load_gpr(t0, rs);
+ gen_load_gpr(t1, rt);
+
+ tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
+ if (!is_double) {
+ tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
+ }
+
+ return true;
+}
+
+static bool trans_MULTu_G(DisasContext *s, arg_muldiv *a)
+{
+ return gen_lext_MULT_G(s, a->rt, a->rs, a->rd, false);
+}
+
+static bool trans_DMULTu_G(DisasContext *s, arg_muldiv *a)
+{
+ return gen_lext_MULT_G(s, a->rt, a->rs, a->rd, true);
+}
+
bool decode_ext_loongson(DisasContext *ctx, uint32_t insn)
{
if (!decode_64bit_enabled(ctx)) {
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 4abc30a6a5f..2d01f5c4a8b 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -327,11 +327,6 @@ enum {
OPC_MUL = 0x02 | OPC_SPECIAL2,
OPC_MSUB = 0x04 | OPC_SPECIAL2,
OPC_MSUBU = 0x05 | OPC_SPECIAL2,
- /* Loongson 2F */
- OPC_MULT_G_2F = 0x10 | OPC_SPECIAL2,
- OPC_DMULT_G_2F = 0x11 | OPC_SPECIAL2,
- OPC_MULTU_G_2F = 0x12 | OPC_SPECIAL2,
- OPC_DMULTU_G_2F = 0x13 | OPC_SPECIAL2,
/* Misc */
OPC_CLZ = 0x20 | OPC_SPECIAL2,
OPC_CLO = 0x21 | OPC_SPECIAL2,
@@ -360,12 +355,6 @@ enum {
OPC_RDHWR = 0x3B | OPC_SPECIAL3,
OPC_GINV = 0x3D | OPC_SPECIAL3,
- /* Loongson 2E */
- OPC_MULT_G_2E = 0x18 | OPC_SPECIAL3,
- OPC_MULTU_G_2E = 0x19 | OPC_SPECIAL3,
- OPC_DMULT_G_2E = 0x1C | OPC_SPECIAL3,
- OPC_DMULTU_G_2E = 0x1D | OPC_SPECIAL3,
-
/* MIPS DSP Load */
OPC_LX_DSP = 0x0A | OPC_SPECIAL3,
/* MIPS DSP Arithmetic */
@@ -3572,46 +3561,6 @@ static void gen_cl(DisasContext *ctx, uint32_t opc,
}
}
-/* Godson integer instructions */
-static void gen_loongson_integer(DisasContext *ctx, uint32_t opc,
- int rd, int rs, int rt)
-{
- TCGv t0, t1;
-
- if (rd == 0) {
- /* Treat as NOP. */
- return;
- }
-
- t0 = tcg_temp_new();
- t1 = tcg_temp_new();
- gen_load_gpr(t0, rs);
- gen_load_gpr(t1, rt);
-
- switch (opc) {
- case OPC_MULT_G_2E:
- case OPC_MULT_G_2F:
- tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
- tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
- break;
- case OPC_MULTU_G_2E:
- case OPC_MULTU_G_2F:
- tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
- tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
- break;
-#if defined(TARGET_MIPS64)
- case OPC_DMULT_G_2E:
- case OPC_DMULT_G_2F:
- tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
- break;
- case OPC_DMULTU_G_2E:
- case OPC_DMULTU_G_2F:
- tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
- break;
-#endif
- }
-}
-
/* Loongson multimedia instructions */
static void gen_loongson_multimedia(DisasContext *ctx, int rd, int rs, int rt)
{
@@ -13467,11 +13416,6 @@ static void decode_opc_special2_legacy(CPUMIPSState *env, DisasContext *ctx)
case OPC_MUL:
gen_arith(ctx, op1, rd, rs, rt);
break;
- case OPC_MULT_G_2F:
- case OPC_MULTU_G_2F:
- check_insn(ctx, INSN_LOONGSON2F | ASE_LEXT);
- gen_loongson_integer(ctx, op1, rd, rs, rt);
- break;
case OPC_CLO:
case OPC_CLZ:
check_insn(ctx, ISA_MIPS_R1);
@@ -13496,11 +13440,6 @@ static void decode_opc_special2_legacy(CPUMIPSState *env, DisasContext *ctx)
check_mips_64(ctx);
gen_cl(ctx, op1, rd, rs);
break;
- case OPC_DMULT_G_2F:
- case OPC_DMULTU_G_2F:
- check_insn(ctx, INSN_LOONGSON2F | ASE_LEXT);
- gen_loongson_integer(ctx, op1, rd, rs, rt);
- break;
#endif
default: /* Invalid */
MIPS_INVAL("special2_legacy");
@@ -13633,10 +13572,9 @@ static void decode_opc_special3_legacy(CPUMIPSState *env, DisasContext *ctx)
op1 = MASK_SPECIAL3(ctx->opcode);
switch (op1) {
- case OPC_MULT_G_2E:
- case OPC_MULTU_G_2E:
+ case OPC_MUL_PH_DSP:
/*
- * OPC_MULT_G_2E, OPC_ADDUH_QB_DSP, OPC_MUL_PH_DSP have
+ * OPC_ADDUH_QB_DSP, OPC_MUL_PH_DSP have
* the same mask and op1.
*/
if ((ctx->insn_flags & ASE_DSP_R2) && (op1 == OPC_MUL_PH_DSP)) {
@@ -13667,8 +13605,6 @@ static void decode_opc_special3_legacy(CPUMIPSState *env, DisasContext *ctx)
gen_reserved_instruction(ctx);
break;
}
- } else if (ctx->insn_flags & INSN_LOONGSON2E) {
- gen_loongson_integer(ctx, op1, rd, rs, rt);
} else {
gen_reserved_instruction(ctx);
}
@@ -13897,11 +13833,6 @@ static void decode_opc_special3_legacy(CPUMIPSState *env, DisasContext *ctx)
}
break;
#if defined(TARGET_MIPS64)
- case OPC_DMULT_G_2E:
- case OPC_DMULTU_G_2E:
- check_insn(ctx, INSN_LOONGSON2E);
- gen_loongson_integer(ctx, op1, rd, rs, rt);
- break;
case OPC_ABSQ_S_QH_DSP:
op2 = MASK_ABSQ_S_QH(ctx->opcode);
switch (op2) {
--
2.45.2
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