| ; RUN: llc < %s -mtriple=ve | FileCheck %s |
| |
| ;;; Test ‘fneg’ Instruction |
| ;;; |
| ;;; Syntax: |
| ;;; <result> = fneg ptr <ty> <op1> ; yields ty:result |
| ;;; |
| ;;; Overview: |
| ;;; The ‘fneg’ instruction returns the negation of its operand. |
| ;;; |
| ;;; Arguments: |
| ;;; The argument to the ‘fneg’ instruction must be a floating-point or |
| ;;; vector of floating-point values. |
| ;;; |
| ;;; Semantics: |
| ;;; |
| ;;; The value produced is a copy of the operand with its sign bit flipped. |
| ;;; This instruction can also take any number of fast-math flags, which are |
| ;;; optimization hints to enable otherwise unsafe floating-point |
| ;;; optimizations. |
| ;;; |
| ;;; Example: |
| ;;; <result> = fneg float %val ; yields float:result = -%var |
| ;;; |
| ;;; Note: |
| ;;; We test only float/double/fp128. |
| |
| ; Function Attrs: norecurse nounwind readnone |
| define float @fneg_float(float %0) { |
| ; CHECK-LABEL: fneg_float: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: sra.l %s0, %s0, 32 |
| ; CHECK-NEXT: lea %s1, -2147483648 |
| ; CHECK-NEXT: and %s1, %s1, (32)0 |
| ; CHECK-NEXT: xor %s0, %s0, %s1 |
| ; CHECK-NEXT: sll %s0, %s0, 32 |
| ; CHECK-NEXT: b.l.t (, %s10) |
| %2 = fneg float %0 |
| ret float %2 |
| } |
| |
| ; Function Attrs: norecurse nounwind readnone |
| define double @fneg_double(double %0) { |
| ; CHECK-LABEL: fneg_double: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: xor %s0, %s0, (1)1 |
| ; CHECK-NEXT: b.l.t (, %s10) |
| %2 = fneg double %0 |
| ret double %2 |
| } |
| |
| ; Function Attrs: norecurse nounwind readnone |
| define fp128 @fneg_quad(fp128 %0) { |
| ; CHECK-LABEL: fneg_quad: |
| ; CHECK: .LBB{{[0-9]+}}_2: |
| ; CHECK-NEXT: st %s1, (, %s11) |
| ; CHECK-NEXT: st %s0, 8(, %s11) |
| ; CHECK-NEXT: ld1b.zx %s0, 15(, %s11) |
| ; CHECK-NEXT: lea %s1, 128 |
| ; CHECK-NEXT: xor %s0, %s0, %s1 |
| ; CHECK-NEXT: st1b %s0, 15(, %s11) |
| ; CHECK-NEXT: ld %s1, (, %s11) |
| ; CHECK-NEXT: ld %s0, 8(, %s11) |
| ; CHECK-NEXT: adds.l %s11, 16, %s11 |
| ; CHECK-NEXT: b.l.t (, %s10) |
| %2 = fneg fp128 %0 |
| ret fp128 %2 |
| } |