#define gteBFC (((s32 *)regs->CP2C.r)[23])
#define gteOFX (((s32 *)regs->CP2C.r)[24])
#define gteOFY (((s32 *)regs->CP2C.r)[25])
-#define gteH (regs->CP2C.p[26].sw.l)
+// senquack - gteH register is u16, not s16, and used in GTE that way.
+// HOWEVER when read back by CPU using CFC2, it will be incorrectly
+// sign-extended by bug in original hardware, according to Nocash docs
+// GTE section 'Screen Offset and Distance'. The emulator does this
+// sign extension when it is loaded to GTE by CTC2.
+//#define gteH (psxRegs.CP2C.p[26].sw.l)
+#define gteH (psxRegs.CP2C.p[26].w.l)
#define gteDQA (regs->CP2C.p[27].sw.l)
#define gteDQB (((s32 *)regs->CP2C.r)[28])
#define gteZSF3 (regs->CP2C.p[29].sw.l)
#define A3U(x) (x)
#endif
+
+//senquack - n param should be unsigned (will be 'gteH' reg which is u16)
+#ifdef GTE_USE_NATIVE_DIVIDE
+INLINE u32 DIVIDE(u16 n, u16 d) {
+ if (n < d * 2) {
+ return ((u32)n << 16) / d;
+ }
+ return 0xffffffff;
+}
+#else
#include "gte_divider.h"
+#endif // GTE_USE_NATIVE_DIVIDE
#ifndef FLAGLESS
void gteRTPS(psxCP2Regs *regs) {
int quotient;
+ s64 tmp;
#ifdef GTE_LOG
GTE_LOG("GTE RTPS\n");
gteSX2 = limG1(F((s64)gteOFX + ((s64)gteIR1 * quotient)) >> 16);
gteSY2 = limG2(F((s64)gteOFY + ((s64)gteIR2 * quotient)) >> 16);
- gteMAC0 = F((s64)gteDQB + ((s64)gteDQA * quotient));
- gteIR0 = limH(gteMAC0 >> 12);
+ tmp = (s64)gteDQB + ((s64)gteDQA * quotient);
+ gteMAC0 = F(tmp);
+ gteIR0 = limH(tmp >> 12);
}
void gteRTPT(psxCP2Regs *regs) {
int quotient;
int v;
s32 vx, vy, vz;
+ s64 tmp;
#ifdef GTE_LOG
GTE_LOG("GTE RTPT\n");
fSX(v) = limG1(F((s64)gteOFX + ((s64)gteIR1 * quotient)) >> 16);
fSY(v) = limG2(F((s64)gteOFY + ((s64)gteIR2 * quotient)) >> 16);
}
- gteMAC0 = F((s64)gteDQB + ((s64)gteDQA * quotient));
- gteIR0 = limH(gteMAC0 >> 12);
+
+ tmp = (s64)gteDQB + ((s64)gteDQA * quotient);
+ gteMAC0 = F(tmp);
+ gteIR0 = limH(tmp >> 12);
}
void gteMVMVA(psxCP2Regs *regs) {