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https://github.com/c64scene-ar/llvm-6502.git
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760a46522a
The FPv4-SP floating-point unit is generally referred to as single-precision only, but it does have double-precision registers and load, store and GPR<->DPR move instructions which operate on them. This patch enables the use of these registers, the main advantage of which is that we now comply with the AAPCS-VFP calling convention. This partially reverts r209650, which added some AAPCS-VFP support, but did not handle return values or alignment of double arguments in registers. This patch also adds tests for Thumb2 code generation for floating-point instructions and intrinsics, which previously only existed for ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216172 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.6 KiB
LLVM
51 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=thumbv7-none-eabi -mcpu=cortex-m4 -mattr=-vfp2 | FileCheck %s -check-prefix=CHECK -check-prefix=SOFT
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; RUN: llc < %s -mtriple=thumbv7-none-eabihf -mcpu=cortex-m4 -mattr=+vfp4,+fp-only-sp | FileCheck %s -check-prefix=CHECK -check-prefix=HARD -check-prefix=SP
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; RUN: llc < %s -mtriple=thumbv7-none-eabihf -mcpu=cortex-a8 -mattr=+vfp3 | FileCheck %s -check-prefix=CHECK -check-prefix=HARD -check-prefix=DP
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define float @float_in_reg(float %a, float %b) {
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entry:
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; CHECK-LABEL: float_in_reg:
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; SOFT: mov r0, r1
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; HARD: vmov.f32 s0, s1
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; CHECK-NEXT: bx lr
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ret float %b
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}
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define double @double_in_reg(double %a, double %b) {
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entry:
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; CHECK-LABEL: double_in_reg:
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; SOFT: mov r0, r2
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; SOFT: mov r1, r3
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; SP: vmov.f32 s0, s2
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; SP: vmov.f32 s1, s3
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; DP: vmov.f64 d0, d1
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; CHECK-NEXT: bx lr
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ret double %b
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}
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define float @float_on_stack(double %a, double %b, double %c, double %d, double %e, double %f, double %g, double %h, float %i) {
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; CHECK-LABEL: float_on_stack:
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; SOFT: ldr r0, [sp, #48]
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; HARD: vldr s0, [sp]
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; CHECK-NEXT: bx lr
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ret float %i
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}
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define double @double_on_stack(double %a, double %b, double %c, double %d, double %e, double %f, double %g, double %h, double %i) {
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; CHECK-LABEL: double_on_stack:
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; SOFT: ldr r0, [sp, #48]
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; SOFT: ldr r1, [sp, #52]
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; HARD: vldr d0, [sp]
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; CHECK-NEXT: bx lr
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ret double %i
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}
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define double @double_not_split(double %a, double %b, double %c, double %d, double %e, double %f, double %g, float %h, double %i) {
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; CHECK-LABEL: double_not_split:
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; SOFT: ldr r0, [sp, #48]
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; SOFT: ldr r1, [sp, #52]
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; HARD: vldr d0, [sp]
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; CHECK-NEXT: bx lr
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ret double %i
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}
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