target/arm: Correct comments about M-profile FPSCR
The M-profile FPSCR LTPSIZE is bits [18:16]; this is the same
field as A-profile FPSCR Len, not Stride. Correct the comment
in vfp_get_fpscr().
We also implemented M-profile FPSCR.QC, but forgot to delete
a TODO comment from vfp_set_fpscr(); remove it now.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240628142347.1283015-2-peter.maydell@linaro.org
diff --git a/target/arm/vfp_helper.c b/target/arm/vfp_helper.c
index 50d7042..e168600 100644
--- a/target/arm/vfp_helper.c
+++ b/target/arm/vfp_helper.c
@@ -176,8 +176,8 @@
| (env->vfp.vec_stride << 20);
/*
- * M-profile LTPSIZE overlaps A-profile Stride; whichever of the
- * two is not applicable to this CPU will always be zero.
+ * M-profile LTPSIZE is the same bits [18:16] as A-profile Len; whichever
+ * of the two is not applicable to this CPU will always be zero.
*/
fpscr |= env->v7m.ltpsize << 16;
@@ -226,7 +226,6 @@
/*
* The bit we set within fpscr_q is arbitrary; the register as a
* whole being zero/non-zero is what counts.
- * TODO: M-profile MVE also has a QC bit.
*/
env->vfp.qc[0] = val & FPCR_QC;
env->vfp.qc[1] = 0;
