glibc/sysdeps/x86/fpu/Makefile

ifeq ($(subdir),math)
libm-support += powl_helper
tests += test-fenv-sse
CFLAGS-test-fenv-sse.c += -msse2 -mfpmath=sse
endif
Fix powl inaccuracy for x86_64 and x86 (bug 13881). 2012-11-28 13:40:54 +00:00			`ifeq ($(subdir),math)`
			`libm-support += powl_helper`
Include SSE state in i386 fenv_t (bug 16064). This patch fixes bug 16064, i386 fenv_t not including SSE state, using the technique suggested there of storing the state in the existing __eip field of fenv_t to avoid needing to increase the size of fenv_t and add new symbol versions. The included testcase, which previously failed for i386 (but passed for x86_64), illustrates how the previous state was buggy. This patch causes the SSE state to be included to the extent it is on x86_64. Where some state should logically be included but isn't for x86_64 (see bug 16068), this patch does not cause it to be included for i386 either. The idea is that any patch fixing that bug should fix it for both x86_64 and i386 at once. Tested i386 and x86_64. (I haven't tested the case of a CPU without SSE2 disabling the test.) [BZ #16064] * sysdeps/i386/fpu/fegetenv.c: Include <unistd.h>, <ldsodefs.h> and <dl-procinfo.h>. (__fegetenv): Save SSE state in envp->__eip if supported. * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Save SSE state in envp->__eip if supported. * sysdeps/i386/fpu/fesetenv.c: Include <unistd.h>, <ldsodefs.h> and <dl-procinfo.h>. (__fesetenv): Always set __eip, __cs_selector, __opcode, __data_offset and __data_selector in environment to 0. Set SSE state if supported. * sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add test-fenv-sse. [$(subdir) = math] (CFLAGS-test-fenv-sse.c): Add -msse2 -mfpmath=sse. * sysdeps/x86/fpu/test-fenv-sse.c: New file. 2014-05-09 16:59:56 +00:00			`tests += test-fenv-sse`
			`CFLAGS-test-fenv-sse.c += -msse2 -mfpmath=sse`
Fix powl inaccuracy for x86_64 and x86 (bug 13881). 2012-11-28 13:40:54 +00:00			`endif`