From: Philippe Mathieu-Daudé <f4...@amsat.org>
DIV.G and DDIV.G are very similar. Provide gen_lext_DIV_G() a
'is_double' argument so it can generate DIV.G (divide 32-bit
signed integers).
With this commit we explicit the template used to generate
opcode for 32/64-bit word variants. Next commits will be less
verbose by providing both variants at once.
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
target/mips/tcg/godson2.decode | 1 +
target/mips/tcg/loong-ext.decode | 1 +
target/mips/tcg/loong_translate.c | 28 ++++++++++++++++++++++------
target/mips/tcg/translate.c | 26 --------------------------
4 files changed, 24 insertions(+), 32 deletions(-)
diff --git a/target/mips/tcg/godson2.decode b/target/mips/tcg/godson2.decode
index 47ea5a1c438..cbf24ed88da 100644
--- a/target/mips/tcg/godson2.decode
+++ b/target/mips/tcg/godson2.decode
@@ -13,4 +13,5 @@
@rs_rt_rd ...... rs:5 rt:5 rd:5 ..... ...... &muldiv
+DIV_G 011111 ..... ..... ..... 00000 011010 @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 8b78ec48599..9397606beb6 100644
--- a/target/mips/tcg/loong-ext.decode
+++ b/target/mips/tcg/loong-ext.decode
@@ -14,4 +14,5 @@
@rs_rt_rd ...... rs:5 rt:5 rd:5 ..... ...... &muldiv
+DIV_G 011100 ..... ..... ..... 00000 010100 @rs_rt_rd
DDIV_G 011100 ..... ..... ..... 00000 010101 @rs_rt_rd
diff --git a/target/mips/tcg/loong_translate.c
b/target/mips/tcg/loong_translate.c
index 53e4047cfa0..7c405078795 100644
--- a/target/mips/tcg/loong_translate.c
+++ b/target/mips/tcg/loong_translate.c
@@ -25,15 +25,18 @@
* one result into general-purpose registers.
*/
-static bool gen_lext_DIV_G(DisasContext *s, int rd, int rs, int rt)
+static bool gen_lext_DIV_G(DisasContext *s, int rd, int rs, int rt,
+ bool is_double)
{
TCGv t0, t1;
TCGLabel *l1, *l2, *l3;
- if (TARGET_LONG_BITS != 64) {
- return false;
+ if (is_double) {
+ if (TARGET_LONG_BITS != 64) {
+ return false;
+ }
+ check_mips_64(s);
}
- check_mips_64(s);
if (rd == 0) {
/* Treat as NOP. */
@@ -49,26 +52,39 @@ static bool gen_lext_DIV_G(DisasContext *s, int rd, int rs,
int rt)
gen_load_gpr(t0, rs);
gen_load_gpr(t1, rt);
+ if (!is_double) {
+ tcg_gen_ext32s_tl(t0, t0);
+ tcg_gen_ext32s_tl(t1, t1);
+ }
tcg_gen_brcondi_tl(TCG_COND_NE, t1, 0, l1);
tcg_gen_movi_tl(cpu_gpr[rd], 0);
tcg_gen_br(l3);
gen_set_label(l1);
- tcg_gen_brcondi_tl(TCG_COND_NE, t0, -1LL << 63, l2);
+ tcg_gen_brcondi_tl(TCG_COND_NE, t0, is_double && TARGET_LONG_BITS == 64
+ ? LLONG_MIN : INT_MIN, l2);
tcg_gen_brcondi_tl(TCG_COND_NE, t1, -1LL, l2);
tcg_gen_mov_tl(cpu_gpr[rd], t0);
tcg_gen_br(l3);
gen_set_label(l2);
tcg_gen_div_tl(cpu_gpr[rd], t0, t1);
+ if (!is_double) {
+ tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
+ }
gen_set_label(l3);
return true;
}
+static bool trans_DIV_G(DisasContext *s, arg_muldiv *a)
+{
+ return gen_lext_DIV_G(s, a->rt, a->rs, a->rd, false);
+}
+
static bool trans_DDIV_G(DisasContext *s, arg_muldiv *a)
{
- return gen_lext_DIV_G(s, a->rt, a->rs, a->rd);
+ return gen_lext_DIV_G(s, a->rt, a->rs, a->rd, true);
}
bool decode_ext_loongson(DisasContext *ctx, uint32_t insn)
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 73445dd9074..1c38e893d31 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -332,7 +332,6 @@ enum {
OPC_DMULT_G_2F = 0x11 | OPC_SPECIAL2,
OPC_MULTU_G_2F = 0x12 | OPC_SPECIAL2,
OPC_DMULTU_G_2F = 0x13 | OPC_SPECIAL2,
- OPC_DIV_G_2F = 0x14 | OPC_SPECIAL2,
OPC_DIVU_G_2F = 0x16 | OPC_SPECIAL2,
OPC_DDIVU_G_2F = 0x17 | OPC_SPECIAL2,
OPC_MOD_G_2F = 0x1c | OPC_SPECIAL2,
@@ -370,7 +369,6 @@ enum {
/* Loongson 2E */
OPC_MULT_G_2E = 0x18 | OPC_SPECIAL3,
OPC_MULTU_G_2E = 0x19 | OPC_SPECIAL3,
- OPC_DIV_G_2E = 0x1A | OPC_SPECIAL3,
OPC_DIVU_G_2E = 0x1B | OPC_SPECIAL3,
OPC_DMULT_G_2E = 0x1C | OPC_SPECIAL3,
OPC_DMULTU_G_2E = 0x1D | OPC_SPECIAL3,
@@ -3613,28 +3611,6 @@ static void gen_loongson_integer(DisasContext *ctx,
uint32_t opc,
tcg_gen_mul_tl(cpu_gpr[rd], t0, t1);
tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
break;
- case OPC_DIV_G_2E:
- case OPC_DIV_G_2F:
- {
- TCGLabel *l1 = gen_new_label();
- TCGLabel *l2 = gen_new_label();
- TCGLabel *l3 = gen_new_label();
- tcg_gen_ext32s_tl(t0, t0);
- tcg_gen_ext32s_tl(t1, t1);
- tcg_gen_brcondi_tl(TCG_COND_NE, t1, 0, l1);
- tcg_gen_movi_tl(cpu_gpr[rd], 0);
- tcg_gen_br(l3);
- gen_set_label(l1);
- tcg_gen_brcondi_tl(TCG_COND_NE, t0, INT_MIN, l2);
- tcg_gen_brcondi_tl(TCG_COND_NE, t1, -1, l2);
- tcg_gen_mov_tl(cpu_gpr[rd], t0);
- tcg_gen_br(l3);
- gen_set_label(l2);
- tcg_gen_div_tl(cpu_gpr[rd], t0, t1);
- tcg_gen_ext32s_tl(cpu_gpr[rd], cpu_gpr[rd]);
- gen_set_label(l3);
- }
- break;
case OPC_DIVU_G_2E:
case OPC_DIVU_G_2F:
{
@@ -13598,7 +13574,6 @@ static void decode_opc_special2_legacy(CPUMIPSState
*env, DisasContext *ctx)
case OPC_MUL:
gen_arith(ctx, op1, rd, rs, rt);
break;
- case OPC_DIV_G_2F:
case OPC_DIVU_G_2F:
case OPC_MULT_G_2F:
case OPC_MULTU_G_2F:
@@ -13771,7 +13746,6 @@ static void decode_opc_special3_legacy(CPUMIPSState
*env, DisasContext *ctx)
op1 = MASK_SPECIAL3(ctx->opcode);
switch (op1) {
- case OPC_DIV_G_2E:
case OPC_DIVU_G_2E:
case OPC_MOD_G_2E:
case OPC_MODU_G_2E:
--
2.45.2
