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-rw-r--r--psp/mips_emit.h28
1 files changed, 21 insertions, 7 deletions
diff --git a/psp/mips_emit.h b/psp/mips_emit.h
index 679c9e0..7f51b8f 100644
--- a/psp/mips_emit.h
+++ b/psp/mips_emit.h
@@ -2969,19 +2969,33 @@ static void emit_pmemst_stub(
*tr_ptr = translation_ptr;
}
+// Palette conversion functions. a1 contains the palette value (16 LSB)
+// Places the result in reg_temp, can use a0 as temporary register
#ifdef USE_BGR_FORMAT
- /* 0BGR to BGR565, for PSP */
+ /* 0BGR to BGR565, only for PSP (uses ins) */
#define palette_convert() \
mips_emit_sll(reg_temp, reg_a1, 1); \
mips_emit_andi(reg_temp, reg_temp, 0xFFC0); \
mips_emit_ins(reg_temp, reg_a1, 0, 5);
#else
- /* 0BGR to RGB565 (clobbers a0!) */
- #define palette_convert() \
- mips_emit_ext(reg_temp, reg_a1, 10, 5); \
- mips_emit_ins(reg_temp, reg_a1, 11, 5); \
- mips_emit_ext(reg_a0, reg_a1, 5, 5); \
- mips_emit_ins(reg_temp, reg_a0, 6, 5);
+ /* 0BGR to RGB565 (clobbers a0) */
+ #ifdef MIPS_HAS_R2_INSTS
+ #define palette_convert() \
+ mips_emit_ext(reg_temp, reg_a1, 10, 5); \
+ mips_emit_ins(reg_temp, reg_a1, 11, 5); \
+ mips_emit_ext(reg_a0, reg_a1, 5, 5); \
+ mips_emit_ins(reg_temp, reg_a0, 6, 5);
+ #else
+ #define palette_convert() \
+ mips_emit_srl(reg_a0, reg_a1, 10); \
+ mips_emit_andi(reg_temp, reg_a0, 0x1F); \
+ mips_emit_sll(reg_a0, reg_a1, 1); \
+ mips_emit_andi(reg_a0, reg_a0, 0x7C0); \
+ mips_emit_or(reg_temp, reg_temp, reg_a0); \
+ mips_emit_andi(reg_a0, reg_a1, 0x1F); \
+ mips_emit_sll(reg_a0, reg_a0, 11); \
+ mips_emit_or(reg_temp, reg_temp, reg_a0);
+ #endif
#endif
// Palette is accessed differently and stored in a decoded manner