diff options
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 6 | ||||
| -rw-r--r-- | libgcc/config/i386/sfp-exceptions.c | 20 |
2 files changed, 14 insertions, 12 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 7dbab3e..02b36d3 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,9 @@ +2020-05-01 Uroš Bizjak <ubizjak@gmail.com> + + * config/i386/sfp-exceptions.c (__math_force_eval): New define. + (__sfp_handle_exceptions): Use __math_force_eval to evaluete + generic division to generate INVALID and DIVZERO exceptions. + 2020-04-27 Sebastian Huber <sebastian.huber@embedded-brains.de> * config/rs6000/crtresfpr.S: Use .machine ppc. diff --git a/libgcc/config/i386/sfp-exceptions.c b/libgcc/config/i386/sfp-exceptions.c index 31a24ce..4b3a7a0 100644 --- a/libgcc/config/i386/sfp-exceptions.c +++ b/libgcc/config/i386/sfp-exceptions.c @@ -41,18 +41,19 @@ struct fenv unsigned short int __unused5; }; +#ifdef __SSE_MATH__ +# define __math_force_eval(x) asm volatile ("" : : "x" (x)); +#else +# define __math_force_eval(x) asm volatile ("" : : "f" (x)); +#endif + void __sfp_handle_exceptions (int _fex) { if (_fex & FP_EX_INVALID) { float f = 0.0f; -#ifdef __SSE_MATH__ - asm volatile ("%vdivss\t{%0, %d0|%d0, %0}" : "+x" (f)); -#else - asm volatile ("fdiv\t{%y0, %0|%0, %y0}" : "+t" (f)); - /* No need for fwait, exception is triggered by emitted fstp. */ -#endif + __math_force_eval (f / f); } if (_fex & FP_EX_DENORM) { @@ -65,12 +66,7 @@ __sfp_handle_exceptions (int _fex) if (_fex & FP_EX_DIVZERO) { float f = 1.0f, g = 0.0f; -#ifdef __SSE_MATH__ - asm volatile ("%vdivss\t{%1, %d0|%d0, %1}" : "+x" (f) : "xm" (g)); -#else - asm volatile ("fdivs\t%1" : "+t" (f) : "m" (g)); - /* No need for fwait, exception is triggered by emitted fstp. */ -#endif + __math_force_eval (f / g); } if (_fex & FP_EX_OVERFLOW) { |