From 232a2c8c85541e3b491f61b90f151f1edcdb3944 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Sun, 27 Jun 2021 20:06:04 +0800 Subject: target/riscv: csr: Remove redundant check in fp csr read/write routines The following check: if (!env->debugger && !riscv_cpu_fp_enabled(env)) { return -RISCV_EXCP_ILLEGAL_INST; } is redundant in fflags/frm/fcsr read/write routines, as the check was already done in fs(). Signed-off-by: Bin Meng Reviewed-by: Alistair Francis Message-id: 20210627120604.11116-1-bmeng.cn@gmail.com Signed-off-by: Alistair Francis --- target/riscv/csr.c | 24 ------------------------ 1 file changed, 24 deletions(-) (limited to 'target') diff --git a/target/riscv/csr.c b/target/riscv/csr.c index fe5628fea6..62b968326c 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -215,11 +215,6 @@ static RISCVException epmp(CPURISCVState *env, int csrno) static RISCVException read_fflags(CPURISCVState *env, int csrno, target_ulong *val) { -#if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } -#endif *val = riscv_cpu_get_fflags(env); return RISCV_EXCP_NONE; } @@ -228,9 +223,6 @@ static RISCVException write_fflags(CPURISCVState *env, int csrno, target_ulong val) { #if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } env->mstatus |= MSTATUS_FS; #endif riscv_cpu_set_fflags(env, val & (FSR_AEXC >> FSR_AEXC_SHIFT)); @@ -240,11 +232,6 @@ static RISCVException write_fflags(CPURISCVState *env, int csrno, static RISCVException read_frm(CPURISCVState *env, int csrno, target_ulong *val) { -#if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } -#endif *val = env->frm; return RISCV_EXCP_NONE; } @@ -253,9 +240,6 @@ static RISCVException write_frm(CPURISCVState *env, int csrno, target_ulong val) { #if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } env->mstatus |= MSTATUS_FS; #endif env->frm = val & (FSR_RD >> FSR_RD_SHIFT); @@ -265,11 +249,6 @@ static RISCVException write_frm(CPURISCVState *env, int csrno, static RISCVException read_fcsr(CPURISCVState *env, int csrno, target_ulong *val) { -#if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } -#endif *val = (riscv_cpu_get_fflags(env) << FSR_AEXC_SHIFT) | (env->frm << FSR_RD_SHIFT); if (vs(env, csrno) >= 0) { @@ -283,9 +262,6 @@ static RISCVException write_fcsr(CPURISCVState *env, int csrno, target_ulong val) { #if !defined(CONFIG_USER_ONLY) - if (!env->debugger && !riscv_cpu_fp_enabled(env)) { - return RISCV_EXCP_ILLEGAL_INST; - } env->mstatus |= MSTATUS_FS; #endif env->frm = (val & FSR_RD) >> FSR_RD_SHIFT; -- cgit v1.2.3