Mercurial > repos > blastem
changeset 173:47b2796fb277
Implement negx
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 06 Jan 2013 15:20:23 -0800 |
| parents | c61507f897e4 |
| children | a1c3ecb4823f |
| files | m68k_to_x86.c |
| diffstat | 1 files changed, 35 insertions(+), 4 deletions(-) [+] |
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--- a/m68k_to_x86.c Sun Jan 06 14:41:26 2013 -0800 +++ b/m68k_to_x86.c Sun Jan 06 15:20:23 2013 -0800 @@ -3001,19 +3001,50 @@ break; //case M68K_NBCD: case M68K_NEG: + dst = cycles(dst, BUS); if (dst_op.mode == MODE_REG_DIRECT) { dst = neg_r(dst, dst_op.base, inst->extra.size); } else { dst = neg_rdisp8(dst, dst_op.base, dst_op.disp, inst->extra.size); } - dst = mov_ir(dst, 0, FLAG_C, SZ_B); + dst = setcc_r(dst, CC_C, FLAG_C); dst = setcc_r(dst, CC_Z, FLAG_Z); dst = setcc_r(dst, CC_S, FLAG_N); - dst = mov_ir(dst, 0, FLAG_V, SZ_B); + dst = setcc_r(dst, CC_O, FLAG_V); + dst = mov_rrind(dst, FLAG_C, CONTEXT, SZ_B); dst = m68k_save_result(inst, dst, opts); break; - /*case M68K_NEGX: - break;*/ + case M68K_NEGX: + dst = cycles(dst, BUS); + if (dst_op.mode == MODE_REG_DIRECT) { + if (dst_op.base == SCRATCH1) { + dst = push_r(dst, SCRATCH2); + dst = xor_rr(dst, SCRATCH2, SCRATCH2, inst->extra.size); + dst = bt_irdisp8(dst, 0, CONTEXT, 0, SZ_B); + dst = sbb_rr(dst, dst_op.base, SCRATCH2, inst->extra.size); + dst = mov_rr(dst, SCRATCH2, dst_op.base, inst->extra.size); + dst = pop_r(dst, SCRATCH2); + } else { + dst = xor_rr(dst, SCRATCH1, SCRATCH1, inst->extra.size); + dst = bt_irdisp8(dst, 0, CONTEXT, 0, SZ_B); + dst = sbb_rr(dst, dst_op.base, SCRATCH1, inst->extra.size); + dst = mov_rr(dst, SCRATCH1, dst_op.base, inst->extra.size); + } + } else { + dst = xor_rr(dst, SCRATCH1, SCRATCH1, inst->extra.size); + dst = bt_irdisp8(dst, 0, CONTEXT, 0, SZ_B); + dst = sbb_rdisp8r(dst, dst_op.base, dst_op.disp, SCRATCH1, inst->extra.size); + dst = mov_rrdisp8(dst, SCRATCH1, dst_op.base, dst_op.disp, inst->extra.size); + } + dst = setcc_r(dst, CC_C, FLAG_C); + dst = jcc(dst, CC_NZ, dst+4); + dst = mov_ir(dst, 1, FLAG_Z, SZ_B); + dst = setcc_r(dst, CC_S, FLAG_N); + dst = setcc_r(dst, CC_O, FLAG_V); + dst = mov_rrind(dst, FLAG_C, CONTEXT, SZ_B); + dst = m68k_save_result(inst, dst, opts); + break; + break; case M68K_NOP: dst = cycles(dst, BUS); break;