9e6b2e1605
Summary: This adds the 'f' inline assembly constraint, as supported by GCC. An 'f'-constrained operand is passed in a floating point register. Exactly which kind of floating-point register (32-bit or 64-bit) is decided based on the operand type and the available standard extensions (-f and -d, respectively). This patch adds support in both the clang frontend, and LLVM itself. Reviewers: asb, lewis-revill Reviewed By: asb Subscribers: hiraditya, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65500 llvm-svn: 367403
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
// RUN: %clang_cc1 -triple riscv32 -O2 -emit-llvm %s -o - \
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// RUN: | FileCheck %s
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// RUN: %clang_cc1 -triple riscv64 -O2 -emit-llvm %s -o - \
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// RUN: | FileCheck %s
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// Test RISC-V specific inline assembly constraints.
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void test_I() {
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// CHECK-LABEL: define void @test_I()
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// CHECK: call void asm sideeffect "", "I"(i32 2047)
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asm volatile ("" :: "I"(2047));
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// CHECK: call void asm sideeffect "", "I"(i32 -2048)
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asm volatile ("" :: "I"(-2048));
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}
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void test_J() {
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// CHECK-LABEL: define void @test_J()
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// CHECK: call void asm sideeffect "", "J"(i32 0)
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asm volatile ("" :: "J"(0));
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}
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void test_K() {
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// CHECK-LABEL: define void @test_K()
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// CHECK: call void asm sideeffect "", "K"(i32 31)
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asm volatile ("" :: "K"(31));
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// CHECK: call void asm sideeffect "", "K"(i32 0)
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asm volatile ("" :: "K"(0));
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}
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float f;
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double d;
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void test_f() {
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// CHECK-LABEL: define void @test_f()
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// CHECK: [[FLT_ARG:%[a-zA-Z_0-9]+]] = load float, float* @f
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// CHECK: call void asm sideeffect "", "f"(float [[FLT_ARG]])
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asm volatile ("" :: "f"(f));
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// CHECK: [[FLT_ARG:%[a-zA-Z_0-9]+]] = load double, double* @d
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// CHECK: call void asm sideeffect "", "f"(double [[FLT_ARG]])
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asm volatile ("" :: "f"(d));
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}
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