diff options
| -rw-r--r-- | csrc/mkf_cfunc.c | 60 |
1 files changed, 50 insertions, 10 deletions
diff --git a/csrc/mkf_cfunc.c b/csrc/mkf_cfunc.c index 201b750..d716cc0 100644 --- a/csrc/mkf_cfunc.c +++ b/csrc/mkf_cfunc.c @@ -1,3 +1,41 @@ +void fcn_00451801_no_unroll(int16_t *a, int nbytes) +{ + int nw = nbytes >> 1; + int eax = dw_47637c; + + switch (eax) { + case 1: + for (int i = 0; i < nw; i++) { + uint16_t t = a[i]; + uint16_t t2 = t * 2; + t &= 0x001f; /* t[0:4] */ + t2 &= 0xffc0; /* t2[6:15] = t[5:14] */ + a[i] = t | t2; /* t[0:4],0,t[5:14] */ + } + return; + case 2: + for (int i = 0; i < nw; i++) { + uint16_t t = a[i]; + uint16_t v1 = (t & 0x7c00) >> 10; /* v1[0:4] = t[10:14] */ + uint16_t v2 = (t & 0x03e0) << 1; /* v2[6:10] = t[5:9] */ + uint16_t v3 = (t & 0x001f) << 11; /* v3[11:15] = t[0:4] */ + a[i] = v1 | v2 | v3; /* t[10:14],0,t[5:9],t[0:4] */ + } + return; + case 3: + for (int i = 0; i < nw; i++) { + uint16_t t = a[i]; + uint16_t v1 = (t & 0x7800) >> 3; /* v1[8:11] = t[11:14] */ + uint16_t v2 = (t & 0x03c0) >> 2; /* v2[4:7] = t[6:9] */ + uint16_t v3 = (t & 0x001e) >> 1; /* v3[0:3] = t[1:4] */ + a[i] = v1 | v2 | v3; /* t[1:4],t[6:9],t[11:14] */ + } + return; + default: + return; + } +} + void fcn_00451801(int16_t *a1, int nbytes) { int t; /* esp + 8 */ @@ -79,20 +117,22 @@ struct spr_smp struct { int v1; int v2, v3; /* unused? */ - } t[]; + } t[0]; }; void fcn_00450069(char *s) { - if (strcmp(s, "SPR") == 0) { - int *t = (int*)s; - esi = t[5]; - t[5] = s + 0x200 + t[2]; - for (eax = 1; eax < t[1]; eax++) { - ebp = *(int*)(s + eax * 12 + 20); - esi += *(int*)(s + (eax - 1) * 12 + 20); - *(int*)(s + eax * 12 + 20) = esi; - esi = ebp; + struct spr_smp sst = (struct spr_smp*)s; + + if (strcmp(sst->sig, "SPR") == 0) { + int oldv = sst->t[0].v1; + sst->t[0].v1 = (int32_t)s + sst->t2 + 0x200; + + for (int i = 1; i < sst->t1; i++) { + int t = sst->t[i].v1; + /* sum of old and new values of sst->t[i-1] */ + sst->t[i].v1 = oldv + sst->t[i-1].v1; + oldv = t; } } |