diff options
Diffstat (limited to 'sysdeps/i386/fpu/fenv_private.h')
| -rw-r--r-- | sysdeps/i386/fpu/fenv_private.h | 501 |
1 files changed, 0 insertions, 501 deletions
diff --git a/sysdeps/i386/fpu/fenv_private.h b/sysdeps/i386/fpu/fenv_private.h deleted file mode 100644 index e20e1f1662..0000000000 --- a/sysdeps/i386/fpu/fenv_private.h +++ /dev/null @@ -1,501 +0,0 @@ -#ifndef FENV_PRIVATE_H -#define FENV_PRIVATE_H 1 - -#include <fenv.h> -#include <fpu_control.h> - -#ifdef __SSE2_MATH__ -# define math_opt_barrier(x) \ - ({ __typeof(x) __x; \ - if (sizeof (x) <= sizeof (double)) \ - __asm ("" : "=x" (__x) : "0" (x)); \ - else \ - __asm ("" : "=t" (__x) : "0" (x)); \ - __x; }) -# define math_force_eval(x) \ - do { \ - if (sizeof (x) <= sizeof (double)) \ - __asm __volatile ("" : : "x" (x)); \ - else \ - __asm __volatile ("" : : "f" (x)); \ - } while (0) -#else -# define math_opt_barrier(x) \ - ({ __typeof (x) __x; \ - __asm ("" : "=t" (__x) : "0" (x)); \ - __x; }) -# define math_force_eval(x) \ - do { \ - __typeof (x) __x = (x); \ - if (sizeof (x) <= sizeof (double)) \ - __asm __volatile ("" : : "m" (__x)); \ - else \ - __asm __volatile ("" : : "f" (__x)); \ - } while (0) -#endif - -/* This file is used by both the 32- and 64-bit ports. The 64-bit port - has a field in the fenv_t for the mxcsr; the 32-bit port does not. - Instead, we (ab)use the only 32-bit field extant in the struct. */ -#ifndef __x86_64__ -# define __mxcsr __eip -#endif - - -/* All of these functions are private to libm, and are all used in pairs - to save+change the fp state and restore the original state. Thus we - need not care for both the 387 and the sse unit, only the one we're - actually using. */ - -#if defined __AVX__ || defined SSE2AVX -# define STMXCSR "vstmxcsr" -# define LDMXCSR "vldmxcsr" -#else -# define STMXCSR "stmxcsr" -# define LDMXCSR "ldmxcsr" -#endif - -static __always_inline void -libc_feholdexcept_sse (fenv_t *e) -{ - unsigned int mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - e->__mxcsr = mxcsr; - mxcsr = (mxcsr | 0x1f80) & ~0x3f; - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); -} - -static __always_inline void -libc_feholdexcept_387 (fenv_t *e) -{ - /* Recall that fnstenv has a side-effect of masking exceptions. - Clobber all of the fp registers so that the TOS field is 0. */ - asm volatile ("fnstenv %0; fnclex" - : "=m"(*e) - : : "st", "st(1)", "st(2)", "st(3)", - "st(4)", "st(5)", "st(6)", "st(7)"); -} - -static __always_inline void -libc_fesetround_sse (int r) -{ - unsigned int mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - mxcsr = (mxcsr & ~0x6000) | (r << 3); - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); -} - -static __always_inline void -libc_fesetround_387 (int r) -{ - fpu_control_t cw; - _FPU_GETCW (cw); - cw = (cw & ~0xc00) | r; - _FPU_SETCW (cw); -} - -static __always_inline void -libc_feholdexcept_setround_sse (fenv_t *e, int r) -{ - unsigned int mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - e->__mxcsr = mxcsr; - mxcsr = ((mxcsr | 0x1f80) & ~0x603f) | (r << 3); - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); -} - -/* Set both rounding mode and precision. A convenience function for use - by libc_feholdexcept_setround and libc_feholdexcept_setround_53bit. */ -static __always_inline void -libc_feholdexcept_setround_387_prec (fenv_t *e, int r) -{ - libc_feholdexcept_387 (e); - - fpu_control_t cw = e->__control_word; - cw &= ~(_FPU_RC_ZERO | _FPU_EXTENDED); - cw |= r | 0x3f; - _FPU_SETCW (cw); -} - -static __always_inline void -libc_feholdexcept_setround_387 (fenv_t *e, int r) -{ - libc_feholdexcept_setround_387_prec (e, r | _FPU_EXTENDED); -} - -static __always_inline void -libc_feholdexcept_setround_387_53bit (fenv_t *e, int r) -{ - libc_feholdexcept_setround_387_prec (e, r | _FPU_DOUBLE); -} - -static __always_inline int -libc_fetestexcept_sse (int e) -{ - unsigned int mxcsr; - asm volatile (STMXCSR " %0" : "=m" (*&mxcsr)); - return mxcsr & e & FE_ALL_EXCEPT; -} - -static __always_inline int -libc_fetestexcept_387 (int ex) -{ - fexcept_t temp; - asm volatile ("fnstsw %0" : "=a" (temp)); - return temp & ex & FE_ALL_EXCEPT; -} - -static __always_inline void -libc_fesetenv_sse (fenv_t *e) -{ - asm volatile (LDMXCSR " %0" : : "m" (e->__mxcsr)); -} - -static __always_inline void -libc_fesetenv_387 (fenv_t *e) -{ - /* Clobber all fp registers so that the TOS value we saved earlier is - compatible with the current state of the compiler. */ - asm volatile ("fldenv %0" - : : "m" (*e) - : "st", "st(1)", "st(2)", "st(3)", - "st(4)", "st(5)", "st(6)", "st(7)"); -} - -static __always_inline int -libc_feupdateenv_test_sse (fenv_t *e, int ex) -{ - unsigned int mxcsr, old_mxcsr, cur_ex; - asm volatile (STMXCSR " %0" : "=m" (*&mxcsr)); - cur_ex = mxcsr & FE_ALL_EXCEPT; - - /* Merge current exceptions with the old environment. */ - old_mxcsr = e->__mxcsr; - mxcsr = old_mxcsr | cur_ex; - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); - - /* Raise SIGFPE for any new exceptions since the hold. Expect that - the normal environment has all exceptions masked. */ - if (__glibc_unlikely (~(old_mxcsr >> 7) & cur_ex)) - __feraiseexcept (cur_ex); - - /* Test for exceptions raised since the hold. */ - return cur_ex & ex; -} - -static __always_inline int -libc_feupdateenv_test_387 (fenv_t *e, int ex) -{ - fexcept_t cur_ex; - - /* Save current exceptions. */ - asm volatile ("fnstsw %0" : "=a" (cur_ex)); - cur_ex &= FE_ALL_EXCEPT; - - /* Reload original environment. */ - libc_fesetenv_387 (e); - - /* Merge current exceptions. */ - __feraiseexcept (cur_ex); - - /* Test for exceptions raised since the hold. */ - return cur_ex & ex; -} - -static __always_inline void -libc_feupdateenv_sse (fenv_t *e) -{ - libc_feupdateenv_test_sse (e, 0); -} - -static __always_inline void -libc_feupdateenv_387 (fenv_t *e) -{ - libc_feupdateenv_test_387 (e, 0); -} - -static __always_inline void -libc_feholdsetround_sse (fenv_t *e, int r) -{ - unsigned int mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - e->__mxcsr = mxcsr; - mxcsr = (mxcsr & ~0x6000) | (r << 3); - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); -} - -static __always_inline void -libc_feholdsetround_387_prec (fenv_t *e, int r) -{ - fpu_control_t cw; - - _FPU_GETCW (cw); - e->__control_word = cw; - cw &= ~(_FPU_RC_ZERO | _FPU_EXTENDED); - cw |= r; - _FPU_SETCW (cw); -} - -static __always_inline void -libc_feholdsetround_387 (fenv_t *e, int r) -{ - libc_feholdsetround_387_prec (e, r | _FPU_EXTENDED); -} - -static __always_inline void -libc_feholdsetround_387_53bit (fenv_t *e, int r) -{ - libc_feholdsetround_387_prec (e, r | _FPU_DOUBLE); -} - -static __always_inline void -libc_feresetround_sse (fenv_t *e) -{ - unsigned int mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - mxcsr = (mxcsr & ~0x6000) | (e->__mxcsr & 0x6000); - asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr)); -} - -static __always_inline void -libc_feresetround_387 (fenv_t *e) -{ - _FPU_SETCW (e->__control_word); -} - -#ifdef __SSE_MATH__ -# define libc_feholdexceptf libc_feholdexcept_sse -# define libc_fesetroundf libc_fesetround_sse -# define libc_feholdexcept_setroundf libc_feholdexcept_setround_sse -# define libc_fetestexceptf libc_fetestexcept_sse -# define libc_fesetenvf libc_fesetenv_sse -# define libc_feupdateenv_testf libc_feupdateenv_test_sse -# define libc_feupdateenvf libc_feupdateenv_sse -# define libc_feholdsetroundf libc_feholdsetround_sse -# define libc_feresetroundf libc_feresetround_sse -#else -# define libc_feholdexceptf libc_feholdexcept_387 -# define libc_fesetroundf libc_fesetround_387 -# define libc_feholdexcept_setroundf libc_feholdexcept_setround_387 -# define libc_fetestexceptf libc_fetestexcept_387 -# define libc_fesetenvf libc_fesetenv_387 -# define libc_feupdateenv_testf libc_feupdateenv_test_387 -# define libc_feupdateenvf libc_feupdateenv_387 -# define libc_feholdsetroundf libc_feholdsetround_387 -# define libc_feresetroundf libc_feresetround_387 -#endif /* __SSE_MATH__ */ - -#ifdef __SSE2_MATH__ -# define libc_feholdexcept libc_feholdexcept_sse -# define libc_fesetround libc_fesetround_sse -# define libc_feholdexcept_setround libc_feholdexcept_setround_sse -# define libc_fetestexcept libc_fetestexcept_sse -# define libc_fesetenv libc_fesetenv_sse -# define libc_feupdateenv_test libc_feupdateenv_test_sse -# define libc_feupdateenv libc_feupdateenv_sse -# define libc_feholdsetround libc_feholdsetround_sse -# define libc_feresetround libc_feresetround_sse -#else -# define libc_feholdexcept libc_feholdexcept_387 -# define libc_fesetround libc_fesetround_387 -# define libc_feholdexcept_setround libc_feholdexcept_setround_387 -# define libc_fetestexcept libc_fetestexcept_387 -# define libc_fesetenv libc_fesetenv_387 -# define libc_feupdateenv_test libc_feupdateenv_test_387 -# define libc_feupdateenv libc_feupdateenv_387 -# define libc_feholdsetround libc_feholdsetround_387 -# define libc_feresetround libc_feresetround_387 -#endif /* __SSE2_MATH__ */ - -#define libc_feholdexceptl libc_feholdexcept_387 -#define libc_fesetroundl libc_fesetround_387 -#define libc_feholdexcept_setroundl libc_feholdexcept_setround_387 -#define libc_fetestexceptl libc_fetestexcept_387 -#define libc_fesetenvl libc_fesetenv_387 -#define libc_feupdateenv_testl libc_feupdateenv_test_387 -#define libc_feupdateenvl libc_feupdateenv_387 -#define libc_feholdsetroundl libc_feholdsetround_387 -#define libc_feresetroundl libc_feresetround_387 - -#ifndef __SSE2_MATH__ -# define libc_feholdexcept_setround_53bit libc_feholdexcept_setround_387_53bit -# define libc_feholdsetround_53bit libc_feholdsetround_387_53bit -#endif - -/* We have support for rounding mode context. */ -#define HAVE_RM_CTX 1 - -static __always_inline void -libc_feholdexcept_setround_sse_ctx (struct rm_ctx *ctx, int r) -{ - unsigned int mxcsr, new_mxcsr; - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - new_mxcsr = ((mxcsr | 0x1f80) & ~0x603f) | (r << 3); - - ctx->env.__mxcsr = mxcsr; - if (__glibc_unlikely (mxcsr != new_mxcsr)) - { - asm volatile (LDMXCSR " %0" : : "m" (*&new_mxcsr)); - ctx->updated_status = true; - } - else - ctx->updated_status = false; -} - -/* Unconditional since we want to overwrite any exceptions that occurred in the - context. This is also why all fehold* functions unconditionally write into - ctx->env. */ -static __always_inline void -libc_fesetenv_sse_ctx (struct rm_ctx *ctx) -{ - libc_fesetenv_sse (&ctx->env); -} - -static __always_inline void -libc_feupdateenv_sse_ctx (struct rm_ctx *ctx) -{ - if (__glibc_unlikely (ctx->updated_status)) - libc_feupdateenv_test_sse (&ctx->env, 0); -} - -static __always_inline void -libc_feholdexcept_setround_387_prec_ctx (struct rm_ctx *ctx, int r) -{ - libc_feholdexcept_387 (&ctx->env); - - fpu_control_t cw = ctx->env.__control_word; - fpu_control_t old_cw = cw; - cw &= ~(_FPU_RC_ZERO | _FPU_EXTENDED); - cw |= r | 0x3f; - - if (__glibc_unlikely (old_cw != cw)) - { - _FPU_SETCW (cw); - ctx->updated_status = true; - } - else - ctx->updated_status = false; -} - -static __always_inline void -libc_feholdexcept_setround_387_ctx (struct rm_ctx *ctx, int r) -{ - libc_feholdexcept_setround_387_prec_ctx (ctx, r | _FPU_EXTENDED); -} - -static __always_inline void -libc_feholdexcept_setround_387_53bit_ctx (struct rm_ctx *ctx, int r) -{ - libc_feholdexcept_setround_387_prec_ctx (ctx, r | _FPU_DOUBLE); -} - -static __always_inline void -libc_feholdsetround_387_prec_ctx (struct rm_ctx *ctx, int r) -{ - fpu_control_t cw, new_cw; - - _FPU_GETCW (cw); - new_cw = cw; - new_cw &= ~(_FPU_RC_ZERO | _FPU_EXTENDED); - new_cw |= r; - - ctx->env.__control_word = cw; - if (__glibc_unlikely (new_cw != cw)) - { - _FPU_SETCW (new_cw); - ctx->updated_status = true; - } - else - ctx->updated_status = false; -} - -static __always_inline void -libc_feholdsetround_387_ctx (struct rm_ctx *ctx, int r) -{ - libc_feholdsetround_387_prec_ctx (ctx, r | _FPU_EXTENDED); -} - -static __always_inline void -libc_feholdsetround_387_53bit_ctx (struct rm_ctx *ctx, int r) -{ - libc_feholdsetround_387_prec_ctx (ctx, r | _FPU_DOUBLE); -} - -static __always_inline void -libc_feholdsetround_sse_ctx (struct rm_ctx *ctx, int r) -{ - unsigned int mxcsr, new_mxcsr; - - asm (STMXCSR " %0" : "=m" (*&mxcsr)); - new_mxcsr = (mxcsr & ~0x6000) | (r << 3); - - ctx->env.__mxcsr = mxcsr; - if (__glibc_unlikely (new_mxcsr != mxcsr)) - { - asm volatile (LDMXCSR " %0" : : "m" (*&new_mxcsr)); - ctx->updated_status = true; - } - else - ctx->updated_status = false; -} - -static __always_inline void -libc_feresetround_sse_ctx (struct rm_ctx *ctx) -{ - if (__glibc_unlikely (ctx->updated_status)) - libc_feresetround_sse (&ctx->env); -} - -static __always_inline void -libc_feresetround_387_ctx (struct rm_ctx *ctx) -{ - if (__glibc_unlikely (ctx->updated_status)) - _FPU_SETCW (ctx->env.__control_word); -} - -static __always_inline void -libc_feupdateenv_387_ctx (struct rm_ctx *ctx) -{ - if (__glibc_unlikely (ctx->updated_status)) - libc_feupdateenv_test_387 (&ctx->env, 0); -} - -#ifdef __SSE_MATH__ -# define libc_feholdexcept_setroundf_ctx libc_feholdexcept_setround_sse_ctx -# define libc_fesetenvf_ctx libc_fesetenv_sse_ctx -# define libc_feupdateenvf_ctx libc_feupdateenv_sse_ctx -# define libc_feholdsetroundf_ctx libc_feholdsetround_sse_ctx -# define libc_feresetroundf_ctx libc_feresetround_sse_ctx -#else -# define libc_feholdexcept_setroundf_ctx libc_feholdexcept_setround_387_ctx -# define libc_feupdateenvf_ctx libc_feupdateenv_387_ctx -# define libc_feholdsetroundf_ctx libc_feholdsetround_387_ctx -# define libc_feresetroundf_ctx libc_feresetround_387_ctx -#endif /* __SSE_MATH__ */ - -#ifdef __SSE2_MATH__ -# define libc_feholdexcept_setround_ctx libc_feholdexcept_setround_sse_ctx -# define libc_fesetenv_ctx libc_fesetenv_sse_ctx -# define libc_feupdateenv_ctx libc_feupdateenv_sse_ctx -# define libc_feholdsetround_ctx libc_feholdsetround_sse_ctx -# define libc_feresetround_ctx libc_feresetround_sse_ctx -#else -# define libc_feholdexcept_setround_ctx libc_feholdexcept_setround_387_ctx -# define libc_feupdateenv_ctx libc_feupdateenv_387_ctx -# define libc_feholdsetround_ctx libc_feholdsetround_387_ctx -# define libc_feresetround_ctx libc_feresetround_387_ctx -#endif /* __SSE2_MATH__ */ - -#define libc_feholdexcept_setroundl_ctx libc_feholdexcept_setround_387_ctx -#define libc_feupdateenvl_ctx libc_feupdateenv_387_ctx -#define libc_feholdsetroundl_ctx libc_feholdsetround_387_ctx -#define libc_feresetroundl_ctx libc_feresetround_387_ctx - -#ifndef __SSE2_MATH__ -# define libc_feholdsetround_53bit_ctx libc_feholdsetround_387_53bit_ctx -# define libc_feresetround_53bit_ctx libc_feresetround_387_ctx -#endif - -#undef __mxcsr - -#endif /* FENV_PRIVATE_H */ |