derek.holloway
7502bf64a4
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66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
// RUN: %clang_cc1 -emit-llvm -triple i386-linux -Wno-unknown-pragmas -frounding-math %s -o - | FileCheck %s
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constexpr float func_01(float x, float y) {
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return x + y;
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}
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float V1 = func_01(1.0F, 0x0.000001p0F);
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float V2 = 1.0F + 0x0.000001p0F;
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float V3 = func_01(1.0F, 2.0F);
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// CHECK: @V1 = {{.*}}global float 1.000000e+00, align 4
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// CHECK: @V2 = {{.*}}global float 1.000000e+00, align 4
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// CHECK: @V3 = {{.*}}global float 3.000000e+00, align 4
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void test_builtin_elementwise_fma_round_upward() {
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#pragma STDC FENV_ACCESS ON
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#pragma STDC FENV_ROUND FE_UPWARD
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// CHECK: store float f0x40C00008, ptr %f1
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// CHECK: store float f0x40C00008, ptr %f2
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constexpr float f1 = __builtin_elementwise_fma(2.0F, 3.000001F, 0.000001F);
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constexpr float f2 = 2.0F * 3.000001F + 0.000001F;
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static_assert(f1 == f2);
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static_assert(f1 == 6.00000381F);
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// CHECK: store double f0x40180000C9539B89, ptr %d1
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// CHECK: store double f0x40180000C9539B89, ptr %d2
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constexpr double d1 = __builtin_elementwise_fma(2.0, 3.000001, 0.000001);
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constexpr double d2 = 2.0 * 3.000001 + 0.000001;
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static_assert(d1 == d2);
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static_assert(d1 == 6.0000030000000004);
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}
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void test_builtin_elementwise_fma_round_downward() {
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#pragma STDC FENV_ACCESS ON
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#pragma STDC FENV_ROUND FE_DOWNWARD
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// CHECK: store float f0x40C00006, ptr %f3
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// CHECK: store float f0x40C00006, ptr %f4
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constexpr float f3 = __builtin_elementwise_fma(2.0F, 3.000001F, 0.000001F);
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constexpr float f4 = 2.0F * 3.000001F + 0.000001F;
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static_assert(f3 == f4);
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// CHECK: store double f0x40180000C9539B87, ptr %d3
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// CHECK: store double f0x40180000C9539B87, ptr %d4
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constexpr double d3 = __builtin_elementwise_fma(2.0, 3.000001, 0.000001);
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constexpr double d4 = 2.0 * 3.000001 + 0.000001;
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static_assert(d3 == d4);
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}
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void test_builtin_elementwise_fma_round_nearest() {
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#pragma STDC FENV_ACCESS ON
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#pragma STDC FENV_ROUND FE_TONEAREST
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// CHECK: store float f0x40C00006, ptr %f5
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// CHECK: store float f0x40C00006, ptr %f6
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constexpr float f5 = __builtin_elementwise_fma(2.0F, 3.000001F, 0.000001F);
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constexpr float f6 = 2.0F * 3.000001F + 0.000001F;
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static_assert(f5 == f6);
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static_assert(f5 == 6.00000286F);
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// CHECK: store double f0x40180000C9539B89, ptr %d5
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// CHECK: store double f0x40180000C9539B89, ptr %d6
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constexpr double d5 = __builtin_elementwise_fma(2.0, 3.000001, 0.000001);
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constexpr double d6 = 2.0 * 3.000001 + 0.000001;
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static_assert(d5 == d6);
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static_assert(d5 == 6.0000030000000004);
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}
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