diff options
Diffstat (limited to 'sim/tic80/insns')
| -rw-r--r-- | sim/tic80/insns | 48 |
1 files changed, 37 insertions, 11 deletions
diff --git a/sim/tic80/insns b/sim/tic80/insns index ff80bff..7a15fc7 100644 --- a/sim/tic80/insns +++ b/sim/tic80/insns @@ -434,13 +434,15 @@ void::function::set_fp_reg:int Dest, sim_fpu val, int PD break; } case 2: /* signed */ - /* FIXME - rounding */ - GPR (Dest) = sim_fpu_2d (val); - break; + { + GPR (Dest) = sim_fpu_to32i (val); + break; + } case 3: /* unsigned */ - /* FIXME - rounding */ - GPR (Dest) = sim_fpu_2d (val); - break; + { + GPR (Dest) = sim_fpu_to32u (val); + break; + } default: engine_error (SD, CPU, cia, "Unsupported FP precision"); } @@ -516,9 +518,27 @@ void::function::do_fdiv:int Dest, int PD, sim_fpu s1, sim_fpu s2 // fmpy.{s|d|i|u}{s|d|i|u}{s|d|i|u} void::function::do_fmpy:int Dest, int PD, sim_fpu s1, sim_fpu s2 - sim_fpu ans = sim_fpu_mul (s1, s2); - TRACE_FPU3 (MY_INDEX, ans, s1, s2); - set_fp_reg (_SD, Dest, ans, PD); + switch (PD) + { + case 2: /* signed */ + { + GPR (Dest) = sim_fpu_to64i (s1) * sim_fpu_to64i (s2); + TRACE_FPU2I (MY_INDEX, GPR (Dest), s1, s2); + break; + } + case 3: /* unsigned */ + { + GPR (Dest) = sim_fpu_to64u (s1) * sim_fpu_to64u (s2); + TRACE_FPU2I (MY_INDEX, GPR (Dest), s1, s2); + break; + } + default: + { + sim_fpu ans = sim_fpu_mul (s1, s2); + set_fp_reg (_SD, Dest, ans, PD); + TRACE_FPU3 (MY_INDEX, ans, s1, s2); + } + } 31.Dest,26.Source2,21.0b111110010,12.0,11./,10.PD,8.P2,6.P1,4.Source1::f::fmpy r do_fmpy (_SD, Dest, PD, get_fp_reg (_SD, Source1, rSource1, P1), @@ -832,8 +852,14 @@ void::function::do_shift:int Dest, int Source, int Merge, int i, int n, int EndM case 0: case 1: case 2: shiftmask = ~ (unsigned32)0; /* disabled */ break; - case 3: case 4: case 5: - shiftmask = ((1 << nRotate) - 1); /* enabled */ + case 3: case 5: /* enabled - 0 -> 32 */ + if (nRotate == 0) + shiftmask = ~ (unsigned32)0; + else + shiftmask = ((1 << nRotate) - 1); /* enabled - 0 -> 0 */ + break; + case 4: + shiftmask = ((1 << nRotate) - 1); /* enabled - 0 -> 0 */ break; case 6: case 7: shiftmask = ~((1 << nRotate) - 1); /* inverted */ |