# HG changeset patch
# User Seth Troisi <sethtroisi@google.com>
# Date 1784792922 25200
#      Thu Jul 23 00:48:42 2026 -0700
# Node ID a0a1517067da861a0e003450483cc199193683c1
# Parent  1f4ccf2796d4a4bbce6ae01c5884b2e4bf628842
Add prevprime to expr.

diff -r 1f4ccf2796d4 -r a0a1517067da demos/expr/README
--- a/demos/expr/README	Tue Jun 02 23:54:57 2026 -0700
+++ b/demos/expr/README	Thu Jul 23 00:48:42 2026 -0700
@@ -150,7 +150,7 @@
         mpz_expr
             abs bin clrbit cmp cmpabs congruent_p divisible_p even_p fib fac
             gcd hamdist invert jacobi kronecker lcm lucnum max min nextprime
-            odd_p perfect_power_p perfect_square_p popcount powm
+            odd_p perfect_power_p perfect_square_p popcount powm prevprime
             probab_prime_p root scan0 scan1 setbit sgn sqrt
 
         mpq_expr
diff -r 1f4ccf2796d4 -r a0a1517067da demos/expr/exprz.c
--- a/demos/expr/exprz.c	Tue Jun 02 23:54:57 2026 -0700
+++ b/demos/expr/exprz.c	Thu Jul 23 00:48:42 2026 -0700
@@ -171,6 +171,7 @@
   { "popcount",  (mpexpr_fun_t) e_mpz_popcount,    MPEXPR_TYPE_UNARY         },
   { "powm",      (mpexpr_fun_t) mpz_powm,          MPEXPR_TYPE_TERNARY       },
   { "probab_prime_p",  (mpexpr_fun_t)mpz_probab_prime_p,  MPEXPR_TYPE_I_UNARY},
+  { "prevprime", (mpexpr_fun_t) mpz_prevprime,     MPEXPR_TYPE_UNARY         },
   { "root",      (mpexpr_fun_t) mpz_root,          MPEXPR_TYPE_BINARY_UI     },
   { "scan0",     (mpexpr_fun_t) e_mpz_scan0,       MPEXPR_TYPE_BINARY_UI     },
   { "scan1",     (mpexpr_fun_t) e_mpz_scan1,       MPEXPR_TYPE_BINARY_UI     },