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Diffstat (limited to 'arch/i386/math-emu/reg_constant.c')
| -rw-r--r-- | arch/i386/math-emu/reg_constant.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/arch/i386/math-emu/reg_constant.c b/arch/i386/math-emu/reg_constant.c deleted file mode 100644 index a8501580196..00000000000 --- a/arch/i386/math-emu/reg_constant.c +++ /dev/null @@ -1,120 +0,0 @@ -/*---------------------------------------------------------------------------+ - | reg_constant.c | - | | - | All of the constant FPU_REGs | - | | - | Copyright (C) 1992,1993,1994,1997 | - | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | - | Australia. E-mail billm@suburbia.net | - | | - | | - +---------------------------------------------------------------------------*/ - -#include "fpu_system.h" -#include "fpu_emu.h" -#include "status_w.h" -#include "reg_constant.h" -#include "control_w.h" - - -#define MAKE_REG(s,e,l,h) { l, h, \ - ((EXTENDED_Ebias+(e)) | ((SIGN_##s != 0)*0x8000)) } - -FPU_REG const CONST_1 = MAKE_REG(POS, 0, 0x00000000, 0x80000000); -#if 0 -FPU_REG const CONST_2 = MAKE_REG(POS, 1, 0x00000000, 0x80000000); -FPU_REG const CONST_HALF = MAKE_REG(POS, -1, 0x00000000, 0x80000000); -#endif /* 0 */ -static FPU_REG const CONST_L2T = MAKE_REG(POS, 1, 0xcd1b8afe, 0xd49a784b); -static FPU_REG const CONST_L2E = MAKE_REG(POS, 0, 0x5c17f0bc, 0xb8aa3b29); -FPU_REG const CONST_PI = MAKE_REG(POS, 1, 0x2168c235, 0xc90fdaa2); -FPU_REG const CONST_PI2 = MAKE_REG(POS, 0, 0x2168c235, 0xc90fdaa2); -FPU_REG const CONST_PI4 = MAKE_REG(POS, -1, 0x2168c235, 0xc90fdaa2); -static FPU_REG const CONST_LG2 = MAKE_REG(POS, -2, 0xfbcff799, 0x9a209a84); -static FPU_REG const CONST_LN2 = MAKE_REG(POS, -1, 0xd1cf79ac, 0xb17217f7); - -/* Extra bits to take pi/2 to more than 128 bits precision. */ -FPU_REG const CONST_PI2extra = MAKE_REG(NEG, -66, - 0xfc8f8cbb, 0xece675d1); - -/* Only the sign (and tag) is used in internal zeroes */ -FPU_REG const CONST_Z = MAKE_REG(POS, EXP_UNDER, 0x0, 0x0); - -/* Only the sign and significand (and tag) are used in internal NaNs */ -/* The 80486 never generates one of these -FPU_REG const CONST_SNAN = MAKE_REG(POS, EXP_OVER, 0x00000001, 0x80000000); - */ -/* This is the real indefinite QNaN */ -FPU_REG const CONST_QNaN = MAKE_REG(NEG, EXP_OVER, 0x00000000, 0xC0000000); - -/* Only the sign (and tag) is used in internal infinities */ -FPU_REG const CONST_INF = MAKE_REG(POS, EXP_OVER, 0x00000000, 0x80000000); - - -static void fld_const(FPU_REG const *c, int adj, u_char tag) -{ - FPU_REG *st_new_ptr; - - if ( STACK_OVERFLOW ) - { - FPU_stack_overflow(); - return; - } - push(); - reg_copy(c, st_new_ptr); - st_new_ptr->sigl += adj; /* For all our fldxxx constants, we don't need to - borrow or carry. */ - FPU_settag0(tag); - clear_C1(); -} - -/* A fast way to find out whether x is one of RC_DOWN or RC_CHOP - (and not one of RC_RND or RC_UP). - */ -#define DOWN_OR_CHOP(x) (x & RC_DOWN) - -static void fld1(int rc) -{ - fld_const(&CONST_1, 0, TAG_Valid); -} - -static void fldl2t(int rc) -{ - fld_const(&CONST_L2T, (rc == RC_UP) ? 1 : 0, TAG_Valid); -} - -static void fldl2e(int rc) -{ - fld_const(&CONST_L2E, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid); -} - -static void fldpi(int rc) -{ - fld_const(&CONST_PI, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid); -} - -static void fldlg2(int rc) -{ - fld_const(&CONST_LG2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid); -} - -static void fldln2(int rc) -{ - fld_const(&CONST_LN2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid); -} - -static void fldz(int rc) -{ - fld_const(&CONST_Z, 0, TAG_Zero); -} - -typedef void (*FUNC_RC)(int); - -static FUNC_RC constants_table[] = { - fld1, fldl2t, fldl2e, fldpi, fldlg2, fldln2, fldz, (FUNC_RC)FPU_illegal -}; - -void fconst(void) -{ - (constants_table[FPU_rm])(control_word & CW_RC); -} |