[ARM] 3473/1: Use numbers 0-15 for the VFP double registers

Patch from Catalin Marinas

This patch changes the double registers numbering to 0-15 from even 0-30,
in preparation for future VFP extensions. It also fixes the VFP_REG_ZERO
bug (value 16 actually represents the 8th double register with the original
numbering).

The original mcrr/mrrc on CP10 were generating FMRRS/FMSRR instead of
FMRRD/FMDRR. The patch changes to CP11 for the correct instructions.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/vfp/vfpdouble.c

@@ -1127,9 +1127,9 @@ u32 vfp_double_cpdo(u32 inst, u32 fpscr)
 {
 	u32 op = inst & FOP_MASK;
 	u32 exceptions = 0;
-	unsigned int dd = vfp_get_sd(inst);
-	unsigned int dn = vfp_get_sn(inst);
-	unsigned int dm = vfp_get_sm(inst);
+	unsigned int dd = vfp_get_dd(inst);
+	unsigned int dn = vfp_get_dn(inst);
+	unsigned int dm = vfp_get_dm(inst);
 	unsigned int vecitr, veclen, vecstride;
 	u32 (*fop)(int, int, s32, u32);
 
@@ -1146,25 +1146,21 @@ u32 vfp_double_cpdo(u32 inst, u32 fpscr)
 	pr_debug("VFP: vecstride=%u veclen=%u\n", vecstride,
 		 (veclen >> FPSCR_LENGTH_BIT) + 1);
 
-	fop = (op == FOP_EXT) ? fop_extfns[dn] : fop_fns[FOP_TO_IDX(op)];
+	fop = (op == FOP_EXT) ? fop_extfns[FEXT_TO_IDX(inst)] : fop_fns[FOP_TO_IDX(op)];
 	if (!fop)
 		goto invalid;
 
 	for (vecitr = 0; vecitr <= veclen; vecitr += 1 << FPSCR_LENGTH_BIT) {
 		u32 except;
 
 		if (op == FOP_EXT)
-			pr_debug("VFP: itr%d (d%u.%u) = op[%u] (d%u.%u)\n",
+			pr_debug("VFP: itr%d (d%u) = op[%u] (d%u)\n",
 				 vecitr >> FPSCR_LENGTH_BIT,
-				 dd >> 1, dd & 1, dn,
-				 dm >> 1, dm & 1);
+				 dd, dn, dm);
 		else
-			pr_debug("VFP: itr%d (d%u.%u) = (d%u.%u) op[%u] (d%u.%u)\n",
+			pr_debug("VFP: itr%d (d%u) = (d%u) op[%u] (d%u)\n",
 				 vecitr >> FPSCR_LENGTH_BIT,
-				 dd >> 1, dd & 1,
-				 dn >> 1, dn & 1,
-				 FOP_TO_IDX(op),
-				 dm >> 1, dm & 1);
+				 dd, dn, FOP_TO_IDX(op), dm);
 
 		except = fop(dd, dn, dm, fpscr);
 		pr_debug("VFP: itr%d: exceptions=%08x\n",

arch/arm/vfp/vfphw.S

@@ -189,11 +189,10 @@ vfp_put_float:
 
 	.globl	vfp_get_double
 vfp_get_double:
-	mov	r0, r0, lsr #1
 	add	pc, pc, r0, lsl #3
 	mov	r0, r0
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	mrrc	p10, 1, r0, r1, c\dr	@ fmrrd	r0, r1, d\dr
+	mrrc	p11, 1, r0, r1, c\dr	@ fmrrd	r0, r1, d\dr
 	mov	pc, lr
 	.endr
 
@@ -204,10 +203,9 @@ vfp_get_double:
 
 	.globl	vfp_put_double
 vfp_put_double:
-	mov	r0, r0, lsr #1
 	add	pc, pc, r0, lsl #3
 	mov	r0, r0
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-	mcrr	p10, 1, r1, r2, c\dr	@ fmrrd	r1, r2, d\dr
+	mcrr	p11, 1, r1, r2, c\dr	@ fmdrr	r1, r2, d\dr
 	mov	pc, lr
 	.endr

arch/arm/vfp/vfpsingle.c

@@ -1193,7 +1193,7 @@ u32 vfp_single_cpdo(u32 inst, u32 fpscr)
 	pr_debug("VFP: vecstride=%u veclen=%u\n", vecstride,
 		 (veclen >> FPSCR_LENGTH_BIT) + 1);
 
-	fop = (op == FOP_EXT) ? fop_extfns[sn] : fop_fns[FOP_TO_IDX(op)];
+	fop = (op == FOP_EXT) ? fop_extfns[FEXT_TO_IDX(inst)] : fop_fns[FOP_TO_IDX(op)];
 	if (!fop)
 		goto invalid;