X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc64%2Fmath-emu%2Fmath.c;h=6ee496c2864a8eb8c12e0132004563d2a253ce8d;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=48dfa37ddd72d4c5685156be72c171910b3cb298;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/arch/sparc64/math-emu/math.c b/arch/sparc64/math-emu/math.c
index 48dfa37dd..6ee496c28 100644
--- a/arch/sparc64/math-emu/math.c
+++ b/arch/sparc64/math-emu/math.c
@@ -185,7 +185,7 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f)
 		die_if_kernel("unfinished/unimplemented FPop from kernel", regs);
 	if (test_thread_flag(TIF_32BIT))
 		pc = (u32)pc;
-	if (get_user(insn, (u32 *)pc) != -EFAULT) {
+	if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
 		if ((insn & 0xc1f80000) == 0x81a00000) /* FPOP1 */ {
 			switch ((insn >> 5) & 0x1ff) {
 			/* QUAD - ftt == 3 */
@@ -206,9 +206,29 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f)
 			case FSTOQ: TYPE(3,3,1,1,1,0,0); break;
 			case FDTOQ: TYPE(3,3,1,2,1,0,0); break;
 			case FQTOI: TYPE(3,1,0,3,1,0,0); break;
+
+			/* We can get either unimplemented or unfinished
+			 * for these cases.  Pre-Niagara systems generate
+			 * unfinished fpop for SUBNORMAL cases, and Niagara
+			 * always gives unimplemented fpop for fsqrt{s,d}.
+			 */
+			case FSQRTS: {
+				unsigned long x = current_thread_info()->xfsr[0];
+
+				x = (x >> 14) & 0xf;
+				TYPE(x,1,1,1,1,0,0);
+				break;
+			}
+
+			case FSQRTD: {
+				unsigned long x = current_thread_info()->xfsr[0];
+
+				x = (x >> 14) & 0xf;
+				TYPE(x,2,1,2,1,0,0);
+				break;
+			}
+
 			/* SUBNORMAL - ftt == 2 */
-			case FSQRTS: TYPE(2,1,1,1,1,0,0); break;
-			case FSQRTD: TYPE(2,2,1,2,1,0,0); break;
 			case FADDD:
 			case FSUBD:
 			case FMULD:
@@ -298,14 +318,14 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f)
 				else if (freg < 16)
 					XR = regs->u_regs[freg];
 				else if (test_thread_flag(TIF_32BIT)) {
-					struct reg_window32 *win32;
+					struct reg_window32 __user *win32;
 					flushw_user ();
-					win32 = (struct reg_window32 *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
+					win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
 					get_user(XR, &win32->locals[freg - 16]);
 				} else {
-					struct reg_window *win;
+					struct reg_window __user *win;
 					flushw_user ();
-					win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
+					win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS);
 					get_user(XR, &win->locals[freg - 16]);
 				}
 				IR = 0;