@@ -3085,6 +3085,210 @@ DISAS_INSN(shift_mem)
set_cc_op(s, CC_OP_FLAGS);
}
+DISAS_INSN(bfext_reg)
+{
+ int ext = read_im16(env, s);
+ int is_sign = insn & 0x200;
+ TCGv src = DREG(insn, 0);
+ TCGv dst = DREG(ext, 12);
+ int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
+ int ofs = extract32(ext, 6, 5); /* big bit-endian */
+ int pos = 32 - ofs - len; /* little bit-endian */
+ TCGv tmp = tcg_temp_new();
+ TCGv shift;
+
+ /* In general, we're going to rotate the field so that it's at the
+ top of the word and then right-shift by the compliment of the
+ width to extend the field. */
+ if (ext & 0x20) {
+ /* Variable width. */
+ if (ext & 0x800) {
+ /* Variable offset. */
+ tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
+ tcg_gen_rotl_i32(tmp, src, tmp);
+ } else {
+ tcg_gen_rotli_i32(tmp, src, ofs);
+ }
+
+ shift = tcg_temp_new();
+ tcg_gen_neg_i32(shift, DREG(ext, 0));
+ tcg_gen_andi_i32(shift, shift, 31);
+ tcg_gen_sar_i32(QREG_CC_N, tmp, shift);
+ if (is_sign) {
+ tcg_gen_mov_i32(dst, QREG_CC_N);
+ } else {
+ tcg_gen_shr_i32(dst, tmp, shift);
+ }
+ tcg_temp_free(shift);
+ } else {
+ /* Immediate width. */
+ if (ext & 0x800) {
+ /* Variable offset */
+ tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
+ tcg_gen_rotl_i32(tmp, src, tmp);
+ src = tmp;
+ pos = 32 - len;
+ } else {
+ /* Immediate offset. If the field doesn't wrap around the
+ end of the word, rely on (s)extract completely. */
+ if (pos < 0) {
+ tcg_gen_rotli_i32(tmp, src, ofs);
+ src = tmp;
+ pos = 32 - len;
+ }
+ }
+
+ tcg_gen_sextract_i32(QREG_CC_N, src, pos, len);
+ if (is_sign) {
+ tcg_gen_mov_i32(dst, QREG_CC_N);
+ } else {
+ tcg_gen_extract_i32(dst, src, pos, len);
+ }
+ }
+
+ tcg_temp_free(tmp);
+ set_cc_op(s, CC_OP_LOGIC);
+}
+
+DISAS_INSN(bfop_reg)
+{
+ int ext = read_im16(env, s);
+ TCGv src = DREG(insn, 0);
+ int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
+ int ofs = extract32(ext, 6, 5); /* big bit-endian */
+ TCGv mask;
+
+ if ((ext & 0x820) == 0) {
+ /* Immediate width and offset. */
+ uint32_t maski = 0x7fffffffu >> (len - 1);
+ if (ofs + len <= 32) {
+ tcg_gen_shli_i32(QREG_CC_N, src, ofs);
+ } else {
+ tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
+ }
+ tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
+ mask = tcg_const_i32(ror32(maski, ofs));
+ } else {
+ TCGv tmp = tcg_temp_new();
+ if (ext & 0x20) {
+ /* Variable width */
+ tcg_gen_subi_i32(tmp, DREG(ext, 0), 1);
+ tcg_gen_andi_i32(tmp, tmp, 31);
+ mask = tcg_const_i32(0x7fffffffu);
+ tcg_gen_shr_i32(mask, mask, tmp);
+ } else {
+ /* Immediate width */
+ mask = tcg_const_i32(0x7fffffffu >> (len - 1));
+ }
+ if (ext & 0x800) {
+ /* Variable offset */
+ tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
+ tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
+ tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
+ tcg_gen_rotr_i32(mask, mask, tmp);
+ } else {
+ /* Immediate offset (and variable width) */
+ tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
+ tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
+ tcg_gen_rotri_i32(mask, mask, ofs);
+ }
+ tcg_temp_free(tmp);
+ }
+ set_cc_op(s, CC_OP_LOGIC);
+
+ switch (insn & 0x0f00) {
+ case 0x0a00: /* bfchg */
+ tcg_gen_eqv_i32(src, src, mask);
+ break;
+ case 0x0c00: /* bfclr */
+ tcg_gen_and_i32(src, src, mask);
+ break;
+ case 0x0e00: /* bfset */
+ tcg_gen_orc_i32(src, src, mask);
+ break;
+ case 0x0800: /* bftst */
+ /* flags already set; no other work to do. */
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ tcg_temp_free(mask);
+}
+
+DISAS_INSN(bfins_reg)
+{
+ int ext = read_im16(env, s);
+ TCGv dst = DREG(insn, 0);
+ TCGv src = DREG(ext, 12);
+ int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
+ int ofs = extract32(ext, 6, 5); /* big bit-endian */
+ int pos = 32 - ofs - len; /* little bit-endian */
+ TCGv tmp;
+
+ tmp = tcg_temp_new();
+
+ if (ext & 0x20) {
+ /* Variable width */
+ tcg_gen_neg_i32(tmp, DREG(ext, 0));
+ tcg_gen_andi_i32(tmp, tmp, 31);
+ tcg_gen_shl_i32(QREG_CC_N, src, tmp);
+ } else {
+ /* Immediate width */
+ tcg_gen_shli_i32(QREG_CC_N, src, 32 - len);
+ }
+ set_cc_op(s, CC_OP_LOGIC);
+
+ /* Immediate width and offset */
+ if ((ext & 0x820) == 0) {
+ /* Check for suitability for deposit. */
+ if (pos >= 0) {
+ tcg_gen_deposit_i32(dst, dst, src, pos, len);
+ } else {
+ uint32_t maski = -2U << (len - 1);
+ uint32_t roti = (ofs + len) & 31;
+ tcg_gen_andi_i32(tmp, src, maski);
+ tcg_gen_rotri_i32(tmp, tmp, roti);
+ tcg_gen_andi_i32(dst, dst, ror32(maski, roti));
+ tcg_gen_or_i32(dst, dst, tmp);
+ }
+ } else {
+ TCGv mask = tcg_temp_new();
+ TCGv rot = tcg_temp_new();
+
+ if (ext & 0x20) {
+ /* Variable width */
+ tcg_gen_subi_i32(rot, DREG(ext, 0), 1);
+ tcg_gen_andi_i32(rot, rot, 31);
+ tcg_gen_movi_i32(mask, -2);
+ tcg_gen_shl_i32(mask, mask, rot);
+ tcg_gen_mov_i32(rot, DREG(ext, 0));
+ tcg_gen_andc_i32(tmp, src, mask);
+ } else {
+ /* Immediate width (variable offset) */
+ uint32_t maski = -2U << (len - 1);
+ tcg_gen_andi_i32(tmp, src, ~maski);
+ tcg_gen_movi_i32(mask, maski);
+ tcg_gen_movi_i32(rot, len & 31);
+ }
+ if (ext & 0x800) {
+ /* Variable offset */
+ tcg_gen_add_i32(rot, rot, DREG(ext, 6));
+ } else {
+ /* Immediate offset (variable width) */
+ tcg_gen_addi_i32(rot, rot, ofs);
+ }
+ tcg_gen_andi_i32(rot, rot, 31);
+ tcg_gen_rotr_i32(mask, mask, rot);
+ tcg_gen_rotr_i32(tmp, tmp, rot);
+ tcg_gen_and_i32(dst, dst, mask);
+ tcg_gen_or_i32(dst, dst, tmp);
+
+ tcg_temp_free(rot);
+ tcg_temp_free(mask);
+ }
+ tcg_temp_free(tmp);
+}
+
DISAS_INSN(ff1)
{
TCGv reg;
@@ -4372,6 +4576,12 @@ void register_m68k_insns (CPUM68KState *env)
INSN(shift16_reg, e060, f0f0, M68000);
INSN(shift_reg, e0a0, f0f0, M68000);
INSN(shift_mem, e0c0, fcc0, M68000);
+ INSN(bfext_reg, e9c0, fdf8, BITFIELD); /* bfextu & bfexts */
+ INSN(bfins_reg, efc0, fff8, BITFIELD);
+ INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */
+ INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */
+ INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */
+ INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */
INSN(undef_fpu, f000, f000, CF_ISA_A);
INSN(fpu, f200, ffc0, CF_FPU);
INSN(fbcc, f280, ff80, CF_FPU);
Signed-off-by: Richard Henderson <rth@twiddle.net> --- target-m68k/translate.c | 210 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 210 insertions(+)