sh: Add a few more branch types to the branch emulator.

This plugs in some extra encodings for matching more bsr/bsrf/jsr
branches.

Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/kernel/traps_32.c

···
 }
 
 #ifdef CONFIG_SH_FPU_EMU
-static int emulate_branch(unsigned short inst, struct pt_regs* regs)
+static int emulate_branch(unsigned short inst, struct pt_regs *regs)
 {
 	/*
 	 * bfs: 8fxx: PC+=d*2+4;
···
 	 * jsr: 4x0b: PC=Rn      after PR=PC+4;
 	 * rts: 000b: PC=PR;
 	 */
-	if ((inst & 0xfd00) == 0x8d00) {
+	if (((inst & 0xf000) == 0xb000)  ||	/* bsr */
+	    ((inst & 0xf0ff) == 0x0003)  ||	/* bsrf */
+	    ((inst & 0xf0ff) == 0x400b))	/* jsr */
+		regs->pr = regs->pc + 4;
+
+	if ((inst & 0xfd00) == 0x8d00) {	/* bfs, bts */
 		regs->pc += SH_PC_8BIT_OFFSET(inst);
 		return 0;
 	}
 
-	if ((inst & 0xe000) == 0xa000) {
+	if ((inst & 0xe000) == 0xa000) {	/* bra, bsr */
 		regs->pc += SH_PC_12BIT_OFFSET(inst);
 		return 0;
 	}
 
-	if ((inst & 0xf0df) == 0x0003) {
+	if ((inst & 0xf0df) == 0x0003) {	/* braf, bsrf */
 		regs->pc += regs->regs[(inst & 0x0f00) >> 8] + 4;
 		return 0;
 	}
 
-	if ((inst & 0xf0df) == 0x400b) {
+	if ((inst & 0xf0df) == 0x400b) {	/* jmp, jsr */
 		regs->pc = regs->regs[(inst & 0x0f00) >> 8];
 		return 0;
 	}
 
-	if ((inst & 0xffff) == 0x000b) {
+	if ((inst & 0xffff) == 0x000b) {	/* rts */
 		regs->pc = regs->pr;
 		return 0;
 	}