[ARM] 3750/3: Fix double VFP emulation for EABI kernels

Patch from Daniel Jacobowitz

vfp_put_double didn't work in a CONFIG_AEABI kernel.  By swapping
the arguments, we arrange for them to be in the same place regardless
of ABI.  I made the same change to vfp_put_float for consistency.

Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 27 insertions, 33 deletions

diff --git a/arch/arm/vfp/vfp.h b/arch/arm/vfp/vfp.h
index 5fbdf81a8aa..96fdf30f6a3 100644
--- a/arch/arm/vfp/vfp.h
+++ b/arch/arm/vfp/vfp.h
@@ -156,7 +156,7 @@ struct vfp_single {
 };
 
 extern s32 vfp_get_float(unsigned int reg);
-extern void vfp_put_float(unsigned int reg, s32 val);
+extern void vfp_put_float(s32 val, unsigned int reg);
 
 /*
  * VFP_SINGLE_MANTISSA_BITS - number of bits in the mantissa
@@ -267,7 +267,7 @@ struct vfp_double {
  */
 #define VFP_REG_ZERO    16
 extern u64 vfp_get_double(unsigned int reg);
-extern void vfp_put_double(unsigned int reg, u64 val);
+extern void vfp_put_double(u64 val, unsigned int reg);
 
 #define VFP_DOUBLE_MANTISSA_BITS        (52)
 #define VFP_DOUBLE_EXPONENT_BITS        (11)
@@ -341,12 +341,6 @@ static inline int vfp_double_type(struct vfp_double *s)
 
 u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exceptions, const char *func);
 
-/*
- * System registers
- */
-extern u32 vfp_get_sys(unsigned int reg);
-extern void vfp_put_sys(unsigned int reg, u32 val);
-
 u32 vfp_estimate_sqrt_significand(u32 exponent, u32 significand);
 
 /*
diff --git a/arch/arm/vfp/vfpdouble.c b/arch/arm/vfp/vfpdouble.c
index 04bd3425b29..add48e36c2d 100644
--- a/arch/arm/vfp/vfpdouble.c
+++ b/arch/arm/vfp/vfpdouble.c
@@ -195,7 +195,7 @@ u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exce
                 s64 d = vfp_double_pack(vd);
                 pr_debug("VFP: %s: d(d%d)=%016llx exceptions=%08x\n", func,
                          dd, d, exceptions);
-                vfp_put_double(dd, d);
+                vfp_put_double(d, dd);
         }
         return exceptions;
 }
@@ -250,19 +250,19 @@ vfp_propagate_nan(struct vfp_double *vdd, struct vfp_double *vdn,
  */
 static u32 vfp_double_fabs(int dd, int unused, int dm, u32 fpscr)
 {
-        vfp_put_double(dd, vfp_double_packed_abs(vfp_get_double(dm)));
+        vfp_put_double(vfp_double_packed_abs(vfp_get_double(dm)), dd);
         return 0;
 }
 
 static u32 vfp_double_fcpy(int dd, int unused, int dm, u32 fpscr)
 {
-        vfp_put_double(dd, vfp_get_double(dm));
+        vfp_put_double(vfp_get_double(dm), dd);
         return 0;
 }
 
 static u32 vfp_double_fneg(int dd, int unused, int dm, u32 fpscr)
 {
-        vfp_put_double(dd, vfp_double_packed_negate(vfp_get_double(dm)));
+        vfp_put_double(vfp_double_packed_negate(vfp_get_double(dm)), dd);
         return 0;
 }
 
@@ -287,7 +287,7 @@ static u32 vfp_double_fsqrt(int dd, int unused, int dm, u32 fpscr)
                         vdp = &vfp_double_default_qnan;
                         ret = FPSCR_IOC;
                 }
-                vfp_put_double(dd, vfp_double_pack(vdp));
+                vfp_put_double(vfp_double_pack(vdp), dd);
                 return ret;
         }
 
@@ -476,7 +476,7 @@ static u32 vfp_double_fcvts(int sd, int unused, int dm, u32 fpscr)
         return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, "fcvts");
 
  pack_nan:
-        vfp_put_float(sd, vfp_single_pack(&vsd));
+        vfp_put_float(vfp_single_pack(&vsd), sd);
         return exceptions;
 }
 
@@ -573,7 +573,7 @@ static u32 vfp_double_ftoui(int sd, int unused, int dm, u32 fpscr)
 
         pr_debug("VFP: ftoui: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
 
-        vfp_put_float(sd, d);
+        vfp_put_float(d, sd);
 
         return exceptions;
 }
@@ -648,7 +648,7 @@ static u32 vfp_double_ftosi(int sd, int unused, int dm, u32 fpscr)
 
         pr_debug("VFP: ftosi: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
 
-        vfp_put_float(sd, (s32)d);
+        vfp_put_float((s32)d, sd);
 
         return exceptions;
 }
@@ -1084,7 +1084,7 @@ static u32 vfp_double_fdiv(int dd, int dn, int dm, u32 fpscr)
  vdn_nan:
         exceptions = vfp_propagate_nan(&vdd, &vdn, &vdm, fpscr);
  pack:
-        vfp_put_double(dd, vfp_double_pack(&vdd));
+        vfp_put_double(vfp_double_pack(&vdd), dd);
         return exceptions;
 
  vdm_nan:
@@ -1104,7 +1104,7 @@ static u32 vfp_double_fdiv(int dd, int dn, int dm, u32 fpscr)
         goto pack;
 
  invalid:
-        vfp_put_double(dd, vfp_double_pack(&vfp_double_default_qnan));
+        vfp_put_double(vfp_double_pack(&vfp_double_default_qnan), dd);
         return FPSCR_IOC;
 }
 
diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S
index eb683cd7716..e51e6679c40 100644
--- a/arch/arm/vfp/vfphw.S
+++ b/arch/arm/vfp/vfphw.S
@@ -178,12 +178,12 @@ vfp_get_float:
 
         .globl  vfp_put_float
 vfp_put_float:
-        add     pc, pc, r0, lsl #3
+        add     pc, pc, r1, lsl #3
         mov     r0, r0
         .irp    dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-        mcr     p10, 0, r1, c\dr, c0, 0 @ fmsr  r0, s0
+        mcr     p10, 0, r0, c\dr, c0, 0 @ fmsr  r0, s0
         mov     pc, lr
-        mcr     p10, 0, r1, c\dr, c0, 4 @ fmsr  r0, s1
+        mcr     p10, 0, r0, c\dr, c0, 4 @ fmsr  r0, s1
         mov     pc, lr
         .endr
 
@@ -203,9 +203,9 @@ vfp_get_double:
 
         .globl  vfp_put_double
 vfp_put_double:
-        add     pc, pc, r0, lsl #3
+        add     pc, pc, r2, lsl #3
         mov     r0, r0
         .irp    dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-        fmdrr   d\dr, r1, r2
+        fmdrr   d\dr, r0, r1
         mov     pc, lr
         .endr
diff --git a/arch/arm/vfp/vfpsingle.c b/arch/arm/vfp/vfpsingle.c
index 78d7cac5f36..8f6c179cafb 100644
--- a/arch/arm/vfp/vfpsingle.c
+++ b/arch/arm/vfp/vfpsingle.c
@@ -200,7 +200,7 @@ u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exce
                 s32 d = vfp_single_pack(vs);
                 pr_debug("VFP: %s: d(s%d)=%08x exceptions=%08x\n", func,
                          sd, d, exceptions);
-                vfp_put_float(sd, d);
+                vfp_put_float(d, sd);
         }
 
         return exceptions;
@@ -257,19 +257,19 @@ vfp_propagate_nan(struct vfp_single *vsd, struct vfp_single *vsn,
  */
 static u32 vfp_single_fabs(int sd, int unused, s32 m, u32 fpscr)
 {
-        vfp_put_float(sd, vfp_single_packed_abs(m));
+        vfp_put_float(vfp_single_packed_abs(m), sd);
         return 0;
 }
 
 static u32 vfp_single_fcpy(int sd, int unused, s32 m, u32 fpscr)
 {
-        vfp_put_float(sd, m);
+        vfp_put_float(m, sd);
         return 0;
 }
 
 static u32 vfp_single_fneg(int sd, int unused, s32 m, u32 fpscr)
 {
-        vfp_put_float(sd, vfp_single_packed_negate(m));
+        vfp_put_float(vfp_single_packed_negate(m), sd);
         return 0;
 }
 
@@ -333,7 +333,7 @@ static u32 vfp_single_fsqrt(int sd, int unused, s32 m, u32 fpscr)
                         vsp = &vfp_single_default_qnan;
                         ret = FPSCR_IOC;
                 }
-                vfp_put_float(sd, vfp_single_pack(vsp));
+                vfp_put_float(vfp_single_pack(vsp), sd);
                 return ret;
         }
 
@@ -517,7 +517,7 @@ static u32 vfp_single_fcvtd(int dd, int unused, s32 m, u32 fpscr)
         return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fcvtd");
 
  pack_nan:
-        vfp_put_double(dd, vfp_double_pack(&vdd));
+        vfp_put_double(vfp_double_pack(&vdd), dd);
         return exceptions;
 }
 
@@ -613,7 +613,7 @@ static u32 vfp_single_ftoui(int sd, int unused, s32 m, u32 fpscr)
 
         pr_debug("VFP: ftoui: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
 
-        vfp_put_float(sd, d);
+        vfp_put_float(d, sd);
 
         return exceptions;
 }
@@ -692,7 +692,7 @@ static u32 vfp_single_ftosi(int sd, int unused, s32 m, u32 fpscr)
 
         pr_debug("VFP: ftosi: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
 
-        vfp_put_float(sd, (s32)d);
+        vfp_put_float((s32)d, sd);
 
         return exceptions;
 }
@@ -1127,7 +1127,7 @@ static u32 vfp_single_fdiv(int sd, int sn, s32 m, u32 fpscr)
  vsn_nan:
         exceptions = vfp_propagate_nan(&vsd, &vsn, &vsm, fpscr);
  pack:
-        vfp_put_float(sd, vfp_single_pack(&vsd));
+        vfp_put_float(vfp_single_pack(&vsd), sd);
         return exceptions;
 
  vsm_nan:
@@ -1147,7 +1147,7 @@ static u32 vfp_single_fdiv(int sd, int sn, s32 m, u32 fpscr)
         goto pack;
 
  invalid:
-        vfp_put_float(sd, vfp_single_pack(&vfp_single_default_qnan));
+        vfp_put_float(vfp_single_pack(&vfp_single_default_qnan), sd);
         return FPSCR_IOC;
 }