sh2: handle some branch exceptions

[picodrive.git] / pico / carthw / svp / ssp16.c

diff --git a/pico/carthw/svp/ssp16.c b/pico/carthw/svp/ssp16.c
index 7118727..e8de001 100644 (file)
--- a/pico/carthw/svp/ssp16.c
+++ b/pico/carthw/svp/ssp16.c
@@ -1,11 +1,31 @@
-// basic, incomplete SSP160x (SSP1601?) interpreter
-// with SVP memory controller emu
-
-// (c) Copyright 2008, Grazvydas "notaz" Ignotas
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
-
+/* 
+ * basic, incomplete SSP160x (SSP1601?) interpreter
+ * with SVP memory controller emu
+ *
+ * Copyright (c) Gražvydas "notaz" Ignotas, 2008
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the organization nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
 
 //#define USE_DEBUGGER
 /* detect ops with unimplemented/invalid fields.
@@ -213,7 +233,7 @@
 #define IJind  (((op>>6)&4)|(op&3))
 
 #define GET_PC() (PC - (unsigned short *)svp->iram_rom)
-#define GET_PPC_OFFS() ((unsigned int)PC - (unsigned int)svp->iram_rom - 2)
+#define GET_PPC_OFFS() ((unsigned char *)PC - svp->iram_rom - 2)
 #define SET_PC(d) PC = (unsigned short *)svp->iram_rom + d
 
 #define REG_READ(r) (((r) <= 4) ? ssp->gr[r].h : read_handlers[r]())
@@ -647,14 +667,14 @@ static void write_XST(u32 d)
 static u32 read_PM4(void)
 {
        u32 d = pm_io(4, 0, 0);
-/* TODO?
+
        if (d == 0) {
                switch (GET_PPC_OFFS()) {
                        case 0x0854: ssp->emu_status |= SSP_WAIT_30FE08; elprintf(EL_SVP, "det TIGHT loop: [30fe08]"); break;
                        case 0x4f12: ssp->emu_status |= SSP_WAIT_30FE06; elprintf(EL_SVP, "det TIGHT loop: [30fe06]"); break;
                }
        }
-*/
+
        if (d != (u32)-1) return d;
        // can be removed?
        elprintf(EL_SVP|EL_ANOMALY, "PM4 raw r %04x @ %04x", rPM4, GET_PPC_OFFS());