rvp: add missing vxsat CSR writes for 70 saturating instructions

Per the P-extension spec, any instruction that performs saturation must
set the vxsat CSR to 1 when the result is clamped. 70 instructions were
missing this write, addressed here in two ways:

1. Convert P_SAT, P_USAT, and P_USAT_FULL macros from pure expression
   macros to GCC statement expressions that detect when saturation
   occurs and write P.VU.vxsat. This automatically fixes ~42
   instructions that use these macros (nclip/nclipi/nclipr/nclipri
   families, psati, psslai, pssh1sadd, pusati, sati, usati, ssh1sadd,
   sslai, and their packed/double-wide variants).

2. Add explicit vxsat writes to 22 instructions with inline saturation
   logic that bypasses the macros:
   - mulq/mulqr/pmulq/pmulqr: set vxsat on INT_MIN * INT_MIN overflow
   - psas/pssa cross variants: set vxsat from sat_add/sat_sub sat flag
   - pssha/psshar DW variants: set vxsat from ov overflow flag
   - pssha/psshar/ssha/sshar: set vxsat in sshamt >= BIT overflow path
   - pusati_dh/pusati_dw: set vxsat on unsigned range clamping

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

0 files changed, 0 insertions, 0 deletions