File: mulhs.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2~deb10u1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 995,836 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (17 lines) | stat: -rw-r--r-- 647 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
; All of these ands and shifts should be folded into rlwimi's
; RUN: llc -verify-machineinstrs < %s -mtriple=ppc32-- -o %t
; RUN: not grep mulhwu %t
; RUN: not grep srawi %t 
; RUN: not grep add %t 
; RUN: grep mulhw %t | count 1

define i32 @mulhs(i32 %a, i32 %b) nounwind {
entry:
        %tmp.1 = sext i32 %a to i64             ; <i64> [#uses=1]
        %tmp.3 = sext i32 %b to i64             ; <i64> [#uses=1]
        %tmp.4 = mul i64 %tmp.3, %tmp.1         ; <i64> [#uses=1]
        %tmp.6 = lshr i64 %tmp.4, 32            ; <i64> [#uses=1]
        %tmp.7 = trunc i64 %tmp.6 to i32                ; <i32> [#uses=1]
        ret i32 %tmp.7
}