diff options
| -rw-r--r-- | ARMInterpreter_ALU.cpp | 6 | ||||
| -rw-r--r-- | GPU2D.cpp | 5 | ||||
| -rw-r--r-- | GPU3D.cpp | 11 |
3 files changed, 13 insertions, 9 deletions
diff --git a/ARMInterpreter_ALU.cpp b/ARMInterpreter_ALU.cpp index 88b69e7..d6c5abd 100644 --- a/ARMInterpreter_ALU.cpp +++ b/ARMInterpreter_ALU.cpp @@ -1301,8 +1301,10 @@ void T_NEG_REG(ARM* cpu) u32 b = cpu->R[(cpu->CurInstr >> 3) & 0x7]; u32 res = -b; cpu->R[cpu->CurInstr & 0x7] = res; - cpu->SetNZ(res & 0x80000000, - !res); + cpu->SetNZCV(res & 0x80000000, + !res, + CARRY_SUB(0, b), + OVERFLOW_SUB(0, b, res)); } void T_CMP_REG(ARM* cpu) @@ -54,7 +54,8 @@ // // 3D/2D blending rules // * if destination selected as 2nd target: -// blending is applied instead of the selected color effect, using full 31bit alpha from 3D layer +// blending is applied instead of the selected color effect, using full 5bit alpha from 3D layer +// (or 6bit alpha? TODO: check it) // this even if the selected color effect is 'none'. // apparently this works even if BG0 isn't selected as 1st target // * if BG0 is selected as 1st target, destination not selected as 2nd target: @@ -231,7 +232,7 @@ void GPU2D::Write16(u32 addr, u16 val) EVB = (val >> 8) & 0x1F; if (EVB > 16) EVB = 16; return; - case 0x54: + case 0x054: EVY = val & 0x1F; if (EVY > 16) EVY = 16; return; @@ -44,11 +44,12 @@ // the added bias affects interpolation. // // depth buffer: -// Z-buffering mode: val = ((Z * 0x800 * 0x1000) / W) + 0x7FFCFF -// W-buffering mode: val = W - 0x1FF -// TODO: confirm W, because it's weird -// ... nope, that shit above isn't right -// also, the formula for the clear depth on GBAtek appears to be wrong +// Z-buffering mode: val = ((Z * 0x800 * 0x1000) / W) + 0x7FFEFF +// W-buffering mode: val = W +// +// formula for clear depth: (GBAtek is wrong there) +// clearZ = (val * 0x200) + 0x1FF; +// if (clearZ >= 0x010000 && clearZ < 0xFFFFFF) clearZ++; namespace GPU3D |