@@ -165,6 +165,7 @@ ANDN 10 ..... 0.0101 ..... . ............. @r_r_ri_cc
ORN 10 ..... 0.0110 ..... . ............. @r_r_ri_cc
XORN 10 ..... 0.0111 ..... . ............. @r_r_ri_cc
ADDC 10 ..... 0.1000 ..... . ............. @r_r_ri_cc
+SUBC 10 ..... 0.1100 ..... . ............. @r_r_ri_cc
MULX 10 ..... 001001 ..... . ............. @r_r_ri_cc0
UMUL 10 ..... 0.1010 ..... . ............. @r_r_ri_cc
@@ -525,51 +525,11 @@ static void gen_op_sub_cc(TCGv dst, TCGv src1, TCGv src2)
tcg_gen_mov_tl(dst, cpu_cc_dst);
}
-static void gen_op_subx_int(DisasContext *dc, TCGv dst, TCGv src1,
- TCGv src2, int update_cc)
+static void gen_op_subc_int(TCGv dst, TCGv src1, TCGv src2,
+ TCGv_i32 carry_32, bool update_cc)
{
- TCGv_i32 carry_32;
TCGv carry;
- switch (dc->cc_op) {
- case CC_OP_DIV:
- case CC_OP_LOGIC:
- /* Carry is known to be zero. Fall back to plain SUB. */
- if (update_cc) {
- gen_op_sub_cc(dst, src1, src2);
- } else {
- tcg_gen_sub_tl(dst, src1, src2);
- }
- return;
-
- case CC_OP_ADD:
- case CC_OP_TADD:
- case CC_OP_TADDTV:
- carry_32 = gen_add32_carry32();
- break;
-
- case CC_OP_SUB:
- case CC_OP_TSUB:
- case CC_OP_TSUBTV:
- if (TARGET_LONG_BITS == 32) {
- /* We can re-use the host's hardware carry generation by using
- a SUB2 opcode. We discard the low part of the output.
- Ideally we'd combine this operation with the add that
- generated the carry in the first place. */
- carry = tcg_temp_new();
- tcg_gen_sub2_tl(carry, dst, cpu_cc_src, src1, cpu_cc_src2, src2);
- goto sub_done;
- }
- carry_32 = gen_sub32_carry32();
- break;
-
- default:
- /* We need external help to produce the carry. */
- carry_32 = tcg_temp_new_i32();
- gen_helper_compute_C_icc(carry_32, tcg_env);
- break;
- }
-
#if TARGET_LONG_BITS == 64
carry = tcg_temp_new();
tcg_gen_extu_i32_i64(carry, carry_32);
@@ -580,16 +540,75 @@ static void gen_op_subx_int(DisasContext *dc, TCGv dst, TCGv src1,
tcg_gen_sub_tl(dst, src1, src2);
tcg_gen_sub_tl(dst, dst, carry);
- sub_done:
if (update_cc) {
+ tcg_debug_assert(dst == cpu_cc_dst);
tcg_gen_mov_tl(cpu_cc_src, src1);
tcg_gen_mov_tl(cpu_cc_src2, src2);
- tcg_gen_mov_tl(cpu_cc_dst, dst);
- tcg_gen_movi_i32(cpu_cc_op, CC_OP_SUBX);
- dc->cc_op = CC_OP_SUBX;
}
}
+static void gen_op_subc_add(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int(dst, src1, src2, gen_add32_carry32(), false);
+}
+
+static void gen_op_subccc_add(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int(dst, src1, src2, gen_sub32_carry32(), true);
+}
+
+static void gen_op_subc_int_sub(TCGv dst, TCGv src1, TCGv src2, bool update_cc)
+{
+ TCGv discard;
+
+ if (TARGET_LONG_BITS == 64) {
+ gen_op_subc_int(dst, src1, src2, gen_sub32_carry32(), update_cc);
+ return;
+ }
+
+ /*
+ * We can re-use the host's hardware carry generation by using
+ * a SUB2 opcode. We discard the low part of the output.
+ */
+ discard = tcg_temp_new();
+ tcg_gen_sub2_tl(discard, dst, cpu_cc_src, src1, cpu_cc_src2, src2);
+
+ if (update_cc) {
+ tcg_debug_assert(dst == cpu_cc_dst);
+ tcg_gen_mov_tl(cpu_cc_src, src1);
+ tcg_gen_mov_tl(cpu_cc_src2, src2);
+ }
+}
+
+static void gen_op_subc_sub(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int_sub(dst, src1, src2, false);
+}
+
+static void gen_op_subccc_sub(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int_sub(dst, src1, src2, true);
+}
+
+static void gen_op_subc_int_generic(TCGv dst, TCGv src1, TCGv src2,
+ bool update_cc)
+{
+ TCGv_i32 carry_32 = tcg_temp_new_i32();
+
+ gen_helper_compute_C_icc(carry_32, tcg_env);
+ gen_op_subc_int(dst, src1, src2, carry_32, update_cc);
+}
+
+static void gen_op_subc_generic(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int_generic(dst, src1, src2, false);
+}
+
+static void gen_op_subccc_generic(TCGv dst, TCGv src1, TCGv src2)
+{
+ gen_op_subc_int_generic(dst, src1, src2, true);
+}
+
static void gen_op_mulscc(TCGv dst, TCGv src1, TCGv src2)
{
TCGv r_temp, zero, t0;
@@ -4280,6 +4299,38 @@ static bool trans_ADDC(DisasContext *dc, arg_r_r_ri_cc *a)
return do_arith(dc, a, CC_OP_ADDX, func, NULL);
}
+static bool trans_SUBC(DisasContext *dc, arg_r_r_ri_cc *a)
+{
+ void (*func)(TCGv, TCGv, TCGv);
+
+ switch (dc->cc_op) {
+ case CC_OP_DIV:
+ case CC_OP_LOGIC:
+ /* Carry is known to be zero. Fall back to plain SUB. */
+ if (a->cc) {
+ return do_arith(dc, a, CC_OP_SUB, gen_op_sub_cc, NULL);
+ }
+ return do_arith(dc, a, -1, tcg_gen_sub_tl, tcg_gen_subi_tl);
+
+ case CC_OP_ADD:
+ case CC_OP_TADD:
+ case CC_OP_TADDTV:
+ func = a->cc ? gen_op_subccc_add : gen_op_subc_add;
+ break;
+
+ case CC_OP_SUB:
+ case CC_OP_TSUB:
+ case CC_OP_TSUBTV:
+ func = a->cc ? gen_op_subccc_sub : gen_op_subc_sub;
+ break;
+
+ default:
+ func = a->cc ? gen_op_subccc_generic : gen_op_subc_generic;
+ break;
+ }
+ return do_arith(dc, a, CC_OP_SUBX, func, NULL);
+}
+
#define CHECK_IU_FEATURE(dc, FEATURE) \
if (!((dc)->def->features & CPU_FEATURE_ ## FEATURE)) \
goto illegal_insn;
@@ -4704,10 +4755,6 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
cpu_src1 = get_src1(dc, insn);
cpu_src2 = get_src2(dc, insn);
switch (xop & ~0x10) {
- case 0xc: /* subx, V9 subc */
- gen_op_subx_int(dc, cpu_dst, cpu_src1, cpu_src2,
- (xop & 0x10));
- break;
#ifdef TARGET_SPARC64
case 0xd: /* V9 udivx */
gen_helper_udivx(cpu_dst, tcg_env, cpu_src1, cpu_src2);
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- target/sparc/insns.decode | 1 + target/sparc/translate.c | 147 +++++++++++++++++++++++++------------- 2 files changed, 98 insertions(+), 50 deletions(-)