RISC-V: Add vmadd vx rv64 c api tests
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/base/vmadd_vx_m_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_m_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_m_rv64-3.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_mu_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_mu_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_mu_rv64-3.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_rv64-3.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tu_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tu_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tu_rv64-3.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tum_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tum_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tum_rv64-3.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tumu_rv64-1.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tumu_rv64-2.c: New test.
* gcc.target/riscv/rvv/base/vmadd_vx_tumu_rv64-3.c: New test.
18 files changed: