target/arm: Use neon_element_offset in vfp_reg_offset

This seems a bit more readable than using offsetof CPU_DoubleU.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201030022618.785675-5-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 88a926d1df037a06159254dec1baa41927c1d58b..88ded4ac2c0146a9fe848fb212f37cdcb86332fc 100644 (file)
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1122,18 +1122,13 @@ static long neon_element_offset(int reg, int element, MemOp size)
     return neon_full_reg_offset(reg) + ofs;
 }
 
-static inline long vfp_reg_offset(bool dp, unsigned reg)
+/* Return the offset of a VFP Dreg (dp = true) or VFP Sreg (dp = false). */
+static long vfp_reg_offset(bool dp, unsigned reg)
 {
     if (dp) {
-        return offsetof(CPUARMState, vfp.zregs[reg >> 1].d[reg & 1]);
+        return neon_element_offset(reg, 0, MO_64);
     } else {
-        long ofs = offsetof(CPUARMState, vfp.zregs[reg >> 2].d[(reg >> 1) & 1]);
-        if (reg & 1) {
-            ofs += offsetof(CPU_DoubleU, l.upper);
-        } else {
-            ofs += offsetof(CPU_DoubleU, l.lower);
-        }
-        return ofs;
+        return neon_element_offset(reg >> 1, reg & 1, MO_32);
     }
 }