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authorRichard Henderson <rth@twiddle.net>2011-10-17 19:57:23 -0700
committerRichard Henderson <rth@twiddle.net>2011-10-26 14:00:19 -0700
commit6c07355325b7622c595b961b53755ad5450db0c4 (patch)
tree6f364fd36b42f76c240a2503152f8ba3558f33b6 /target-sparc
parent2dedf31497bf3f89167bed0aa91c5700579d0b79 (diff)
downloadqemu-6c07355325b7622c595b961b53755ad5450db0c4.zip
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target-sparc: Implement EDGE* instructions.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-sparc')
-rw-r--r--target-sparc/translate.c177
1 files changed, 175 insertions, 2 deletions
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index 102c83a..d02cf06 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -2221,6 +2221,109 @@ static inline void gen_load_trap_state_at_tl(TCGv_ptr r_tsptr, TCGv_ptr cpu_env)
tcg_temp_free_i32(r_tl);
}
+
+static void gen_edge(DisasContext *dc, TCGv dst, TCGv s1, TCGv s2,
+ int width, bool cc, bool left)
+{
+ TCGv lo1, lo2, t1, t2;
+ uint64_t amask, tabl, tabr;
+ int shift, imask, omask;
+
+ if (cc) {
+ tcg_gen_mov_tl(cpu_cc_src, s1);
+ tcg_gen_mov_tl(cpu_cc_src2, s2);
+ tcg_gen_sub_tl(cpu_cc_dst, s1, s2);
+ tcg_gen_movi_i32(cpu_cc_op, CC_OP_SUB);
+ dc->cc_op = CC_OP_SUB;
+ }
+
+ /* Theory of operation: there are two tables, left and right (not to
+ be confused with the left and right versions of the opcode). These
+ are indexed by the low 3 bits of the inputs. To make things "easy",
+ these tables are loaded into two constants, TABL and TABR below.
+ The operation index = (input & imask) << shift calculates the index
+ into the constant, while val = (table >> index) & omask calculates
+ the value we're looking for. */
+ switch (width) {
+ case 8:
+ imask = 0x7;
+ shift = 3;
+ omask = 0xff;
+ if (left) {
+ tabl = 0x80c0e0f0f8fcfeffULL;
+ tabr = 0xff7f3f1f0f070301ULL;
+ } else {
+ tabl = 0x0103070f1f3f7fffULL;
+ tabr = 0xfffefcf8f0e0c080ULL;
+ }
+ break;
+ case 16:
+ imask = 0x6;
+ shift = 1;
+ omask = 0xf;
+ if (left) {
+ tabl = 0x8cef;
+ tabr = 0xf731;
+ } else {
+ tabl = 0x137f;
+ tabr = 0xfec8;
+ }
+ break;
+ case 32:
+ imask = 0x4;
+ shift = 0;
+ omask = 0x3;
+ if (left) {
+ tabl = (2 << 2) | 3;
+ tabr = (3 << 2) | 1;
+ } else {
+ tabl = (1 << 2) | 3;
+ tabr = (3 << 2) | 2;
+ }
+ break;
+ default:
+ abort();
+ }
+
+ lo1 = tcg_temp_new();
+ lo2 = tcg_temp_new();
+ tcg_gen_andi_tl(lo1, s1, imask);
+ tcg_gen_andi_tl(lo2, s2, imask);
+ tcg_gen_shli_tl(lo1, lo1, shift);
+ tcg_gen_shli_tl(lo2, lo2, shift);
+
+ t1 = tcg_const_tl(tabl);
+ t2 = tcg_const_tl(tabr);
+ tcg_gen_shr_tl(lo1, t1, lo1);
+ tcg_gen_shr_tl(lo2, t2, lo2);
+ tcg_gen_andi_tl(dst, lo1, omask);
+ tcg_gen_andi_tl(lo2, lo2, omask);
+
+ amask = -8;
+ if (AM_CHECK(dc)) {
+ amask &= 0xffffffffULL;
+ }
+ tcg_gen_andi_tl(s1, s1, amask);
+ tcg_gen_andi_tl(s2, s2, amask);
+
+ /* We want to compute
+ dst = (s1 == s2 ? lo1 : lo1 & lo2).
+ We've already done dst = lo1, so this reduces to
+ dst &= (s1 == s2 ? -1 : lo2)
+ Which we perform by
+ lo2 |= -(s1 == s2)
+ dst &= lo2
+ */
+ tcg_gen_setcond_tl(TCG_COND_EQ, t1, s1, s2);
+ tcg_gen_neg_tl(t1, t1);
+ tcg_gen_or_tl(lo2, lo2, t1);
+ tcg_gen_and_tl(dst, dst, lo2);
+
+ tcg_temp_free(lo1);
+ tcg_temp_free(lo2);
+ tcg_temp_free(t1);
+ tcg_temp_free(t2);
+}
#endif
#define CHECK_IU_FEATURE(dc, FEATURE) \
@@ -3954,19 +4057,89 @@ static void disas_sparc_insn(DisasContext * dc)
switch (opf) {
case 0x000: /* VIS I edge8cc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 8, 1, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x001: /* VIS II edge8n */
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 8, 0, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x002: /* VIS I edge8lcc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 8, 1, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x003: /* VIS II edge8ln */
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 8, 0, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x004: /* VIS I edge16cc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 16, 1, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x005: /* VIS II edge16n */
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 16, 0, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x006: /* VIS I edge16lcc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 16, 1, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x007: /* VIS II edge16ln */
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 16, 0, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x008: /* VIS I edge32cc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 32, 1, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x009: /* VIS II edge32n */
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 32, 0, 0);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x00a: /* VIS I edge32lcc */
+ CHECK_FPU_FEATURE(dc, VIS1);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 32, 1, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x00b: /* VIS II edge32ln */
- // XXX
- goto illegal_insn;
+ CHECK_FPU_FEATURE(dc, VIS2);
+ gen_movl_reg_TN(rs1, cpu_src1);
+ gen_movl_reg_TN(rs2, cpu_src2);
+ gen_edge(dc, cpu_dst, cpu_src1, cpu_src2, 32, 0, 1);
+ gen_movl_TN_reg(rd, cpu_dst);
+ break;
case 0x010: /* VIS I array8 */
CHECK_FPU_FEATURE(dc, VIS1);
cpu_src1 = get_src1(insn, cpu_src1);