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cmd/asm: change register type for loong64 floating-point

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On Loong64, the two input operands and one output operand of the ADDF
instruction are both floating-point registers; and the floating-point
comparison instruction CMPEQ{F,D}, CMPGE{F,D}, CMPGT{F,D} both input
operands are floating-point registers, and the output operation is a
floating-point condition register, currently, only FCC0 is used as the
floating-point condition register.

Example:
	ADDF	F0, F1, F0
	CMPEQF	F0, F1, FCC0

Change-Id: I4c1c453e522d43f294a8dcab7b6b5247f41c9c68
Reviewed-on: https://go-review.googlesource.com/c/go/+/580281
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Auto-Submit: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Xiaolin Zhao 2024-04-03 15:13:04 +08:00 • committed by Gopher Robot
parent aec5cc52ad
commit f95ae3d689
5 changed files with 31 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

25
src/cmd/internal/obj/loong64/asm.go
View file

@ -82,13 +82,14 @@ var optab = []Optab{
{ACLO, C_REG, C_NONE, C_NONE, C_REG, C_NONE, 9, 4, 0, 0},
{AADDF, C_FREG, C_NONE, C_NONE, C_FREG, C_NONE, 32, 4, 0, 0},
{AADDF, C_FREG, C_REG, C_NONE, C_FREG, C_NONE, 32, 4, 0, 0},
{ACMPEQF, C_FREG, C_REG, C_NONE, C_NONE, C_NONE, 32, 4, 0, 0},
{AADDF, C_FREG, C_FREG, C_NONE, C_FREG, C_NONE, 32, 4, 0, 0},
{AABSF, C_FREG, C_NONE, C_NONE, C_FREG, C_NONE, 33, 4, 0, 0},
{AMOVVF, C_FREG, C_NONE, C_NONE, C_FREG, C_NONE, 33, 4, 0, 0},
{AMOVF, C_FREG, C_NONE, C_NONE, C_FREG, C_NONE, 33, 4, 0, 0},
{AMOVD, C_FREG, C_NONE, C_NONE, C_FREG, C_NONE, 33, 4, 0, 0},
{ACMPEQF, C_FREG, C_FREG, C_NONE, C_FCCREG, C_NONE, 29, 4, 0, 0},
{AMOVW, C_REG, C_NONE, C_NONE, C_SEXT, C_NONE, 7, 4, 0, 0},
{AMOVWU, C_REG, C_NONE, C_NONE, C_SEXT, C_NONE, 7, 4, 0, 0},
{AMOVV, C_REG, C_NONE, C_NONE, C_SEXT, C_NONE, 7, 4, 0, 0},
@ -850,6 +851,21 @@ func (c *ctxt0) aclass(a *obj.Addr) int {
return C_GOK
}
func (c *ctxt0) rclass(r int16) int {
switch {
case REG_R0 <= r && r <= REG_R31:
return C_REG
case REG_F0 <= r && r <= REG_F31:
return C_FREG
case REG_FCC0 <= r && r <= REG_FCC31:
return C_FCCREG
case REG_FCSR0 <= r && r <= REG_FCSR31:
return C_FCSRREG
}
return C_GOK
}
func prasm(p *obj.Prog) {
fmt.Printf("%v\n", p)
}
@ -883,7 +899,7 @@ func (c *ctxt0) oplook(p *obj.Prog) *Optab {
// 2nd source operand
a2 := C_NONE
if p.Reg != 0 {
a2 = C_REG
a2 = c.rclass(p.Reg)
}
// 2nd destination operand
@ -1620,6 +1636,9 @@ func (c *ctxt0) asmout(p *obj.Prog, o *Optab, out []uint32) {
o1 = OP_12IRR(c.opirr(a), uint32(v), uint32(r), uint32(p.From.Reg))
}
case 29: // fcmp.cond.x fj, fk, fcc
o1 = OP_RRR(c.oprrr(p.As), uint32(p.From.Reg), uint32(p.Reg), uint32(p.To.Reg))
case 30: // movw r,fr
a := OP_TEN(8, 1321) // movgr2fr.w
o1 = OP_RR(a, uint32(p.From.Reg), uint32(p.To.Reg))