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| author | Richard Henderson | 2015-09-09 20:34:28 +0200 |
|---|---|---|
| committer | Richard Henderson | 2016-07-12 20:02:58 +0200 |
| commit | 02c79d78853f07d519b3272d06e43041eb4a4105 (patch) | |
| tree | a13d97c983ef44cb6b65006bc2c60f3505b80850 /target-sparc/fop_helper.c | |
| parent | target-sparc: Use cpu_fsr in stfsr (diff) | |
| download | qemu-02c79d78853f07d519b3272d06e43041eb4a4105.tar.gz qemu-02c79d78853f07d519b3272d06e43041eb4a4105.tar.xz qemu-02c79d78853f07d519b3272d06e43041eb4a4105.zip | |
target-sparc: Use cpu_loop_exit_restore from helper_check_ieee_exceptions
This avoids needing to save state before every FP operation.
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-sparc/fop_helper.c')
| -rw-r--r-- | target-sparc/fop_helper.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/target-sparc/fop_helper.c b/target-sparc/fop_helper.c index cdc58ea7a6..c7fb176e4c 100644 --- a/target-sparc/fop_helper.c +++ b/target-sparc/fop_helper.c @@ -19,12 +19,13 @@ #include "qemu/osdep.h" #include "cpu.h" +#include "exec/exec-all.h" #include "exec/helper-proto.h" #define QT0 (env->qt0) #define QT1 (env->qt1) -target_ulong helper_check_ieee_exceptions(CPUSPARCState *env) +static target_ulong do_check_ieee_exceptions(CPUSPARCState *env, uintptr_t ra) { target_ulong status = get_float_exception_flags(&env->fp_status); target_ulong fsr = env->fsr; @@ -51,12 +52,15 @@ target_ulong helper_check_ieee_exceptions(CPUSPARCState *env) } if ((fsr & FSR_CEXC_MASK) & ((fsr & FSR_TEM_MASK) >> 23)) { + CPUState *cs = CPU(sparc_env_get_cpu(env)); + /* Unmasked exception, generate a trap. Note that while the helper is marked as NO_WG, we can get away with writing to cpu state along the exception path, since TCG generated code will never see the write. */ env->fsr = fsr | FSR_FTT_IEEE_EXCP; - helper_raise_exception(env, TT_FP_EXCP); + cs->exception_index = TT_FP_EXCP; + cpu_loop_exit_restore(cs, ra); } else { /* Accumulate exceptions */ fsr |= (fsr & FSR_CEXC_MASK) << 5; @@ -66,6 +70,11 @@ target_ulong helper_check_ieee_exceptions(CPUSPARCState *env) return fsr; } +target_ulong helper_check_ieee_exceptions(CPUSPARCState *env) +{ + return do_check_ieee_exceptions(env, GETPC()); +} + #define F_HELPER(name, p) void helper_f##name##p(CPUSPARCState *env) #define F_BINOP(name) \ @@ -262,7 +271,7 @@ void helper_fsqrtq(CPUSPARCState *env) ret = glue(size, _compare_quiet)(reg1, reg2, \ &env->fp_status); \ } \ - fsr = helper_check_ieee_exceptions(env); \ + fsr = do_check_ieee_exceptions(env, GETPC()); \ switch (ret) { \ case float_relation_unordered: \ fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \ @@ -293,7 +302,7 @@ void helper_fsqrtq(CPUSPARCState *env) ret = glue(size, _compare_quiet)(src1, src2, \ &env->fp_status); \ } \ - fsr = helper_check_ieee_exceptions(env); \ + fsr = do_check_ieee_exceptions(env, GETPC()); \ switch (ret) { \ case float_relation_unordered: \ fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \ |