Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

[dev.ssa] cmd/compile/internal/ssa: implement multiplies

Browse source 
Use width-and-signed-specific multiply opcodes.
Implement OMUL.
A few other cleanups.

Fixes #11467

Change-Id: Ib0fe80a1a9b7208dbb8a2b6b652a478847f5d244
Reviewed-on: https://go-review.googlesource.com/12540
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Keith Randall 2015-07-22 13:46:15 -07:00
parent d5297f7261
commit be1eb57a8b
8 changed files with 487 additions and 50 deletions
Download patch file Download diff file Expand all files Collapse all files

12
src/cmd/compile/internal/ssa/gen/AMD64Ops.go
View file

@ -126,9 +126,12 @@ func init() {
{name: "CMOVQCC", reg: cmov}, // carry clear
{name: "MOVLQSX", reg: gp11, asm: "MOVLQSX"}, // extend arg0 from int32 to int64
{name: "MOVWQSX", reg: gp11, asm: "MOVWQSX"}, // extend arg0 from int16 to int64
{name: "MOVBQSX", reg: gp11, asm: "MOVBQSX"}, // extend arg0 from int8 to int64
{name: "MOVBQSX", reg: gp11, asm: "MOVBQSX"}, // sign extend arg0 from int8 to int64
{name: "MOVBQZX", reg: gp11, asm: "MOVBQZX"}, // zero extend arg0 from int8 to int64
{name: "MOVWQSX", reg: gp11, asm: "MOVWQSX"}, // sign extend arg0 from int16 to int64
{name: "MOVWQZX", reg: gp11, asm: "MOVWQZX"}, // zero extend arg0 from int16 to int64
{name: "MOVLQSX", reg: gp11, asm: "MOVLQSX"}, // sign extend arg0 from int32 to int64
{name: "MOVLQZX", reg: gp11, asm: "MOVLQZX"}, // zero extend arg0 from int32 to int64
{name: "MOVQconst", reg: gp01}, // auxint
{name: "LEAQ", reg: gp11sb}, // arg0 + auxint + offset encoded in aux
@ -182,6 +185,9 @@ func init() {
{name: "NEGW", reg: gp11, asm: "NEGW"}, // -arg0
{name: "NEGB", reg: gp11, asm: "NEGB"}, // -arg0
{name: "MULL", reg: gp21, asm: "IMULL"}, // arg0*arg1
{name: "MULW", reg: gp21, asm: "IMULW"}, // arg0*arg1
// (InvertFlags (CMPQ a b)) == (CMPQ b a)
// So if we want (SETL (CMPQ a b)) but we can't do that because a is a constant,
// then we do (SETL (InvertFlags (CMPQ b a))) instead.