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x87_timings: new timings for fpu/iu concurrency

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linear cannon
2022-01-29 07:24:04 -08:00
parent 46412caafa
commit 31aed306c9
3 changed files with 160 additions and 1 deletions
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1
src/cpu/cpu.c
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@@ -1369,6 +1369,7 @@ cpu_set(void)
case FPU_487SX:
default:
x87_timings = x87_timings_486;
x87_concurrency = x87_concurrency_486;
}
if (is386) {

155
src/cpu/x87_timings.c
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@@ -8,6 +8,7 @@
#include "x87_timings.h"
x87_timings_t x87_timings;
x87_timings_t x87_concurrency;
const x87_timings_t x87_timings_8087 =
{
@@ -313,3 +314,157 @@ const x87_timings_t x87_timings_486 =
.fyl2x = (196 + 329) / 2,
.fyl2xp1 = (171 + 326) / 2
};
/* this should be used for FPUs with no concurrency.
some pre-486DX Cyrix FPUs reportedly are like this. */
const x87_timings_t x87_concurrency_none =
{
.f2xm1 = 0,
.fabs = 0,
.fadd = 0,
.fadd_32 = 0,
.fadd_64 = 0,
.fbld = 0,
.fbstp = 0,
.fchs = 0,
.fclex = 0,
.fcom = 0,
.fcom_32 = 0,
.fcom_64 = 0,
.fcos = 0,
.fincdecstp = 0,
.fdisi_eni = 0,
.fdiv = 0,
.fdiv_32 = 0,
.fdiv_64 = 0,
.ffree = 0,
.fadd_i16 = 0,
.fadd_i32 = 0,
.fcom_i16 = 0,
.fcom_i32 = 0,
.fdiv_i16 = 0,
.fdiv_i32 = 0,
.fild_16 = 0,
.fild_32 = 0,
.fild_64 = 0,
.fmul_i16 = 0,
.fmul_i32 = 0,
.finit = 0,
.fist_16 = 0,
.fist_32 = 0,
.fist_64 = 0,
.fld = 0,
.fld_32 = 0,
.fld_64 = 0,
.fld_80 = 0,
.fld_z1 = 0,
.fld_const = 0,
.fldcw = 0,
.fldenv = 0,
.fmul = 0,
.fmul_32 = 0,
.fmul_64 = 0,
.fnop = 0,
.fpatan = 0,
.fprem = 0,
.fprem1 = 0,
.fptan = 0,
.frndint = 0,
.frstor = 0,
.fsave = 0,
.fscale = 0,
.fsetpm = 0,
.fsin_cos = 0,
.fsincos = 0,
.fsqrt = 0,
.fst = 0,
.fst_32 = 0,
.fst_64 = 0,
.fst_80 = 0,
.fstcw_sw = 0,
.fstenv = 0,
.ftst = 0,
.fucom = 0,
.fwait = 0,
.fxam = 0,
.fxch = 0,
.fxtract = 0,
.fyl2x = 0,
.fyl2xp1 = 0,
};
const x87_timings_t x87_concurrency_486 =
{
.f2xm1 = 2,
.fabs = 0,
.fadd = 7,
.fadd_32 = 7,
.fadd_64 = 7,
.fbld = 8,
.fbstp = 0,
.fchs = 0,
.fclex = 0,
.fcom = 1,
.fcom_32 = 1,
.fcom_64 = 1,
.fcos = 2,
.fincdecstp = 0,
.fdisi_eni = 0,
.fdiv = 70,
.fdiv_32 = 70,
.fdiv_64 = 70,
.ffree = 0,
.fadd_i16 = 7,
.fadd_i32 = 7,
.fcom_i16 = 1,
.fcom_i32 = 1,
.fdiv_i16 = 70,
.fdiv_i32 = 70,
.fild_16 = 4,
.fild_32 = 4,
.fild_64 = 8,
.fmul_i16 = 8,
.fmul_i32 = 8,
.finit = 0,
.fist_16 = 0,
.fist_32 = 0,
.fist_64 = 0,
.fld = 0,
.fld_32 = 0,
.fld_64 = 0,
.fld_80 = 0,
.fld_z1 = 0,
.fld_const = 2,
.fldcw = 0,
.fldenv = 0,
.fmul = 13,
.fmul_32 = 8,
.fmul_64 = 11,
.fnop = 0,
.fpatan = 5,
.fprem = 2,
.fprem1 = 6,
.fptan = 70,
.frndint = 0,
.frstor = 0,
.fsave = 0,
.fscale = 2,
.fsetpm = 0,
.fsin_cos = 2,
.fsincos = 2,
.fsqrt = 70,
.fst = 0,
.fst_32 = 0,
.fst_64 = 0,
.fst_80 = 0,
.fstcw_sw = 0,
.fstenv = 0,
.ftst = 1,
.fucom = 1,
.fwait = 0,
.fxam = 0,
.fxch = 0,
.fxtract = 4,
.fyl2x = 13,
.fyl2xp1 = 13,
};

5
src/cpu/x87_timings.h
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@@ -53,4 +53,7 @@ extern const x87_timings_t x87_timings_287;
extern const x87_timings_t x87_timings_387;
extern const x87_timings_t x87_timings_486;
extern x87_timings_t x87_timings;
extern const x87_timings_t x87_concurrency_486;
extern x87_timings_t x87_timings;
extern x87_timings_t x87_concurrency;