82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
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// RUN: %clang_cc1 -S -emit-llvm -triple i386-linux -std=c++2a -Wno-unknown-pragmas %s -o - | FileCheck %s
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// nextUp(1.F) == 0x1.000002p0F
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constexpr float add_round_down(float x, float y) {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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float res = x;
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res += y;
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return res;
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}
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constexpr float add_round_up(float x, float y) {
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#pragma STDC FENV_ROUND FE_UPWARD
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float res = x;
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res += y;
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return res;
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}
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float V1 = add_round_down(1.0F, 0x0.000001p0F);
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float V2 = add_round_up(1.0F, 0x0.000001p0F);
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// CHECK: @V1 = {{.*}} float 1.000000e+00
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// CHECK: @V2 = {{.*}} float 0x3FF0000020000000
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constexpr float add_cast_round_down(float x, double y) {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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float res = x;
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res += y;
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return res;
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}
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constexpr float add_cast_round_up(float x, double y) {
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#pragma STDC FENV_ROUND FE_UPWARD
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float res = x;
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res += y;
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return res;
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}
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float V3 = add_cast_round_down(1.0F, 0x0.000001p0F);
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float V4 = add_cast_round_up(1.0F, 0x0.000001p0F);
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// CHECK: @V3 = {{.*}} float 1.000000e+00
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// CHECK: @V4 = {{.*}} float 0x3FF0000020000000
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// The next three variables use the same function as initializer, only rounding
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// modes differ.
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float V5 = []() -> float {
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return [](float x, float y)->float {
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#pragma STDC FENV_ROUND FE_UPWARD
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return x + y;
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}([](float x, float y) -> float {
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#pragma STDC FENV_ROUND FE_UPWARD
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return x + y;
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}(1.0F, 0x0.000001p0F),
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0x0.000001p0F);
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}();
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// CHECK: @V5 = {{.*}} float 0x3FF0000040000000
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float V6 = []() -> float {
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return [](float x, float y)->float {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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return x + y;
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}([](float x, float y) -> float {
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#pragma STDC FENV_ROUND FE_UPWARD
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return x + y;
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}(1.0F, 0x0.000001p0F),
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0x0.000001p0F);
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}();
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// CHECK: @V6 = {{.*}} float 0x3FF0000020000000
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float V7 = []() -> float {
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return [](float x, float y)->float {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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return x + y;
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}([](float x, float y) -> float {
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#pragma STDC FENV_ROUND FE_DOWNWARD
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return x + y;
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}(1.0F, 0x0.000001p0F),
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0x0.000001p0F);
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}();
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// CHECK: @V7 = {{.*}} float 1.000000e+00
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