[PATCH] target/sparc: Fix gdbstub incorrectly handling registers f32-f62

[Mikael Szreder <git@miszr.win>]

The gdbstub implementation for the Sparc architecture would incorectly
 calculate the the floating point register offset.
This would cause register pairs(eg f32,f33) to point to the same value.

Fixes: 30038fd81808 ("target-sparc: Change fpr representation to doubles.")
Signed-off-by: Mikael Szreder <git@miszr.win>
---
 target/sparc/gdbstub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/sparc/gdbstub.c b/target/sparc/gdbstub.c
index ec0036e9ef..5578fa9813 100644
--- a/target/sparc/gdbstub.c
+++ b/target/sparc/gdbstub.c
@@ -80,7 +80,7 @@ int sparc_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     }
     if (n < 80) {
         /* f32-f62 (double width, even numbers only) */
-        return gdb_get_reg64(mem_buf, env->fpr[(n - 32) / 2].ll);
+        return gdb_get_reg64(mem_buf, env->fpr[(n - 64) + 16].ll);
     }
     switch (n) {
     case 80:
@@ -174,7 +174,7 @@ int sparc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
         return 4;
     } else if (n < 80) {
         /* f32-f62 (double width, even numbers only) */
-        env->fpr[(n - 32) / 2].ll = tmp;
+        env->fpr[(n - 64) + 16].ll = tmp;
     } else {
         switch (n) {
         case 80:
-- 
2.48.1