--- /dev/null
+//===----- lib/i386/fp_mode.c - Floaing-point mode utilities -----*- C -*-====//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "../fp_mode.h"
+
+#define X87_TONEAREST 0x0000
+#define X87_DOWNWARD 0x0400
+#define X87_UPWARD 0x0800
+#define X87_TOWARDZERO 0x0c00
+#define X87_RMODE_MASK (X87_TONEAREST | X87_UPWARD | X87_DOWNWARD | X87_TOWARDZERO)
+
+FE_ROUND_MODE __fe_getround() {
+ // Assume that the rounding mode state for the fpu agrees with the SSE unit.
+ unsigned short cw;
+ __asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
+
+ switch (cw & X87_RMODE_MASK) {
+ case X87_TONEAREST:
+ return FE_TONEAREST;
+ case X87_DOWNWARD:
+ return FE_DOWNWARD;
+ case X87_UPWARD:
+ return FE_UPWARD;
+ case X87_TOWARDZERO:
+ return FE_TOWARDZERO;
+ }
+ return FE_TONEAREST;
+}
+
+int __fe_raise_inexact() {
+ float f = 1.0f, g = 3.0f;
+ __asm__ __volatile__ ("fdivs %1" : "+t" (f) : "m" (g));
+ return 0;
+}
UINT64_C(0x61e58dd6c51eb77c)))
return 1;
-#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP)
+#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \
+ defined(i386) || defined(__x86_64__)
// Rounding mode tests on supported architectures
const long double m = 1234.0L, n = 0.01L;
UINT64_C(0xa44a7bca780a166c)))
return 1;
-#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP)
+#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \
+ defined(i386) || defined(__x86_64__)
// Rounding mode tests on supported architectures
const long double m = 1234.02L, n = 0.01L;