lxdream 0.9.1| filename | src/sh4/sh4core.c |
| changeset | 181:bc28fd93e233 |
| prev | 164:84f6b203cfe1 |
| next | 208:ad290228eea1 |
| author | nkeynes |
| date | Thu Jul 06 08:46:41 2006 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | FSCA, FSRRA, FIPR, FTRV should be treated as no-ops when PR=1. At least according to the hardware |
| file | annotate | diff | log | raw |
1.1 --- a/src/sh4/sh4core.c Sun Jun 18 12:00:27 2006 +00001.2 +++ b/src/sh4/sh4core.c Thu Jul 06 08:46:41 2006 +00001.3 @@ -1,5 +1,5 @@1.4 /**1.5 - * $Id: sh4core.c,v 1.28 2006-06-18 12:00:27 nkeynes Exp $1.6 + * $Id: sh4core.c,v 1.29 2006-07-06 08:46:41 nkeynes Exp $1.7 *1.8 * SH4 emulation core, and parent module for all the SH4 peripheral1.9 * modules.1.10 @@ -1328,7 +1328,7 @@1.11 DRN(ir) = sqrt(DRN(ir));1.12 break;1.13 case 7: /* FSRRA FRn */1.14 - DRN(ir) = 1.0/sqrt(DRN(ir));1.15 + /* NO-OP when PR=1 */1.16 break;1.17 case 8: /* FLDI0 FRn */1.18 DRN(ir) = 0.0;1.19 @@ -1337,25 +1337,23 @@1.20 DRN(ir) = 1.0;1.21 break;1.22 case 10: /* FCNVSD FPUL, DRn */1.23 - DRN(ir) = (double)FPULf;1.24 + if( ! IS_FPU_DOUBLESIZE() )1.25 + DRN(ir) = (double)FPULf;1.26 break;1.27 case 11: /* FCNVDS DRn, FPUL */1.28 - FPULf = (float)DRN(ir);1.29 + if( ! IS_FPU_DOUBLESIZE() )1.30 + FPULf = (float)DRN(ir);1.31 break;1.32 case 14:/* FIPR FVm, FVn */1.33 - UNDEF(ir);1.34 + /* NO-OP when PR=1 */1.35 break;1.36 case 15:1.37 if( (ir&0x0300) == 0x0100 ) { /* FTRV XMTRX,FVn */1.38 + /* NO-OP when PR=1 */1.39 break;1.40 }1.41 - else if( (ir&0x0100) == 0 ) { /* FSCA FPUL, DRn */1.42 - float angle = (((float)(short)(FPULi>>16)) +1.43 - ((float)(FPULi&16)/65536.0)) *1.44 - 2 * M_PI;1.45 - int reg = DRNn(ir);1.46 - DR(reg) = sinf(angle);1.47 - DR(reg+1) = cosf(angle);1.48 + else if( (ir&0x0100) == 0 ) { /* FSCA FPUL, DRn */1.49 + /* NO-OP when PR=1 */1.50 break;1.51 }1.52 else if( ir == 0xFBFD ) {1.53 @@ -1461,10 +1459,8 @@1.54 FRN(ir) = 1.0;1.55 break;1.56 case 10: /* FCNVSD FPUL, DRn */1.57 - UNDEF(ir);1.58 break;1.59 case 11: /* FCNVDS DRn, FPUL */1.60 - UNDEF(ir);1.61 break;1.62 case 14:/* FIPR FVm, FVn */1.63 /* FIXME: This is not going to be entirely accurate
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