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drc: timing fixes

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This commit is contained in:
notaz 2013-07-13 19:40:35 +03:00
parent 00faec9cdb
commit 5f0ca48fed
1 changed files with 15 additions and 8 deletions
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23
cpu/sh2/compiler.c
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@ -1551,7 +1551,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
EMITH_JMP_END(DCOND_EQ);
rcache_free_tmp(tmp);
cycles += 3;
cycles += 2;
goto end_op;
}
goto default_;
@ -1674,8 +1674,6 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
emith_clear_msb(tmp2, tmp3, 16);
emith_mul(tmp, tmp, tmp2);
rcache_free_tmp(tmp2);
// FIXME: causes timing issues in Doom?
// cycles++;
goto end_op;
}
goto default_;
@ -1763,6 +1761,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp3 = rcache_get_reg(SHR_MACL, RC_GR_WRITE);
tmp4 = rcache_get_reg(SHR_MACH, RC_GR_WRITE);
emith_mul_u64(tmp3, tmp4, tmp, tmp2);
cycles++;
goto end_op;
case 0x08: // SUB Rm,Rn 0011nnnnmmmm1000
case 0x0c: // ADD Rm,Rn 0011nnnnmmmm1100
@ -1812,6 +1811,7 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
tmp3 = rcache_get_reg(SHR_MACL, RC_GR_WRITE);
tmp4 = rcache_get_reg(SHR_MACH, RC_GR_WRITE);
emith_mul_s64(tmp3, tmp4, tmp, tmp2);
cycles++;
goto end_op;
}
goto default_;
@ -1902,12 +1902,15 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
break;
case 0x03: // STC.L SR,@–Rn 0100nnnn00000011
tmp = SHR_SR;
cycles++;
break;
case 0x13: // STC.L GBR,@–Rn 0100nnnn00010011
tmp = SHR_GBR;
cycles++;
break;
case 0x23: // STC.L VBR,@–Rn 0100nnnn00100011
tmp = SHR_VBR;
cycles++;
break;
default:
goto default_;
@ -1979,12 +1982,15 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
break;
case 0x07: // LDC.L @Rm+,SR 0100mmmm00000111
tmp = SHR_SR;
cycles += 2;
break;
case 0x17: // LDC.L @Rm+,GBR 0100mmmm00010111
tmp = SHR_GBR;
cycles += 2;
break;
case 0x27: // LDC.L @Rm+,VBR 0100mmmm00100111
tmp = SHR_VBR;
cycles += 2;
break;
default:
goto default_;
@ -2267,7 +2273,6 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
case 0x0d00: // BT/S label 10001101dddddddd
case 0x0f00: // BF/S label 10001111dddddddd
DELAYED_OP;
cycles--;
// fallthrough
case 0x0900: // BT label 10001001dddddddd
case 0x0b00: // BF label 10001011dddddddd
@ -2275,7 +2280,6 @@ static void REGPARM(2) *sh2_translate(SH2 *sh2, int tcache_id)
pending_branch_cond = (op & 0x0200) ? DCOND_EQ : DCOND_NE;
i = ((signed int)(op << 24) >> 23);
pending_branch_pc = pc + i + 2;
cycles += 2;
goto end_op;
}
goto default_;
@ -2462,17 +2466,20 @@ end_op:
if (pending_branch_cond != -1 && drcf.delayed_op != 2)
{
u32 target_pc = pending_branch_pc;
int ctaken = drcf.delayed_op ? 1 : 2;
void *target;
sr = rcache_get_reg(SHR_SR, RC_GR_RMW);
// handle cycles
FLUSH_CYCLES(sr);
rcache_clean();
if (drcf.use_saved_t)
emith_tst_r_imm(sr, T_save);
else
emith_tst_r_imm(sr, T);
// handle cycles
emith_sub_r_imm_c(pending_branch_cond, sr, ctaken<<12);
rcache_clean();
#if LINK_BRANCHES
if (find_in_array(branch_target_pc, branch_target_count, target_pc) >= 0) {
// local branch
@ -3180,4 +3187,4 @@ void scan_block(u32 base_pc, int is_slave, u8 *op_flags, u32 *end_pc)
*end_pc = pc;
}
// vim:shiftwidth=2:expandtab
// vim:shiftwidth=2:ts=2:expandtab