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cmd/asm: add LCDBR instruction on s390x 

This CL is to add LCDBR assembly instruction mnemonics, mainly used in math package.

The LCDBR instruction has the same effect as the FNEG pseudo-instructions, just that it sets the flag.

Change-Id: I3f00f1ed19148d074c3b6c5f64af0772289f2802
Reviewed-on: https://go-review.googlesource.com/c/go/+/648036
Reviewed-by: Srinivas Pokala <Pokala.Srinivas@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Munday <mike.munday@lowrisc.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Munday <mike.munday@lowrisc.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Vishwanatha HD 2025-02-10 10:50:59 +00:00 committed by Cherry Mui
parent 3ada42ffed
commit 4ae6ab2bdf
15 changed files with 34 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/cmd/asm/internal/asm/testdata/s390x.s vendored
View File

@ -401,6 +401,7 @@ TEXT main·foo(SB),DUPOK|NOSPLIT,$16-0 // TEXT main.foo(SB), DUPOK|NOSPLIT, $16-
FMADDS F1, F2, F3 // b30e3012
FMSUB F4, F5, F5 // b31f5045
FMSUBS F6, F6, F7 // b30f7066
LCDBR F0, F2 // b3130020
LPDFR F1, F2 // b3700021
LNDFR F3, F4 // b3710043
CPSDR F5, F6, F7 // b3725076
@ -420,8 +421,8 @@ TEXT main·foo(SB),DUPOK|NOSPLIT,$16-0 // TEXT main.foo(SB), DUPOK|NOSPLIT, $16-
KLMD R2, R8 // b93f0028
KIMD R0, R4 // b93e0004
KDSA R0, R8 // b93a0008
KMA R2, R6, R4 // b9296024
KMCTR R2, R6, R4 // b92d6024
KMA R2, R6, R4 // b9296024
KMCTR R2, R6, R4 // b92d6024
// vector add and sub instructions
VAB V3, V4, V4 // e743400000f3

1
src/cmd/internal/obj/s390x/a.out.go
View File

@ -329,6 +329,7 @@ const (
AFNABS
AFNEG
AFNEGS
ALCDBR
ALEDBR
ALDEBR
ALPDFR

1
src/cmd/internal/obj/s390x/anames.go
View File

@ -96,6 +96,7 @@ var Anames = []string{
"FNABS",
"FNEG",
"FNEGS",
"LCDBR",
"LEDBR",
"LDEBR",
"LPDFR",

3
src/cmd/internal/obj/s390x/asmz.go
View File

@ -969,6 +969,7 @@ func buildop(ctxt *obj.Link) {
opset(ALNDFR, r)
opset(AFNEG, r)
opset(AFNEGS, r)
opset(ALCDBR, r)
opset(ALEDBR, r)
opset(ALDEBR, r)
opset(AFSQRT, r)
@ -3373,6 +3374,8 @@ func (c *ctxtz) asmout(p *obj.Prog, asm *[]byte) {
opcode = op_LCDFR
case AFNEGS:
opcode = op_LCEBR
case ALCDBR:
opcode = op_LCDBR
case ALEDBR:
opcode = op_LEDBR
case ALDEBR:

4
src/math/acos_s390x.s
View File

@ -121,7 +121,7 @@ L4:
L12:
FMOVD 24(R9), F0
FMADD F10, F10, F0
WORD $0xB3130080 //lcdbr %f8,%f0
LCDBR F0, F8
WORD $0xED009008 //cdb %f0,.L37-.L13(%r9)
BYTE $0x00
BYTE $0x19
@ -129,7 +129,7 @@ L12:
L5:
MOVW R12, R4
CMPBLE R4, $0, L7
WORD $0xB31300AA //lcdbr %f10,%f10
LCDBR F10, F10
FMOVD $0, F1
BR L3
L9:

4
src/math/asin_s390x.s
View File

@ -139,7 +139,7 @@ L4:
L14:
FMOVD 200(R9), F0
FMADD F8, F8, F0
WORD $0xB31300A0 //lcdbr %f10,%f0
LCDBR F0, F10
WORD $0xED009020 //cdb %f0,.L39-.L15(%r9)
BYTE $0x00
BYTE $0x19
@ -147,7 +147,7 @@ L14:
L6:
MOVW R7, R6
CMPBLE R6, $0, L8
WORD $0xB3130088 //lcdbr %f8,%f8
LCDBR F8, F8
FMOVD 24(R9), F1
BR L4
L10:

6
src/math/asinh_s390x.s
View File

@ -174,7 +174,7 @@ L6:
MOVD R12, R6
CMPBGT R6, $0, L1
WORD $0xB3130000 //lcdbr %f0,%f0
LCDBR F0, F0
FMOVD F0, ret+8(FP)
RET
L16:
@ -206,8 +206,8 @@ L16:
FMOVD F0, ret+8(FP)
RET
L17:
WORD $0xB31300A0 //lcdbr %f10,%f0
LCDBR F0, F10
BR L4
L15:
WORD $0xB31300A0 //lcdbr %f10,%f0
LCDBR F0, F10
BR L9

6
src/math/atan2_s390x.s
View File

@ -244,16 +244,16 @@ L17:
WFDDB V0, V2, V4
BYTE $0x18 //lr %r2,%r5
BYTE $0x25
WORD $0xB3130034 //lcdbr %f3,%f4
LCDBR F4, F3
BR L3
L23:
WORD $0xB3130062 //lcdbr %f6,%f2
LCDBR F2, F6
BR L4
L22:
VLR V20, V0
BR L9
L21:
WORD $0xB3130022 //lcdbr %f2,%f2
LCDBR F2, F2
BR L8
L24:
VLR V20, V4

4
src/math/erfc_s390x.s
View File

@ -355,7 +355,7 @@ L10:
WFMADB V0, V5, V3, V5
BR L11
L35:
WORD $0xB3130010 //lcdbr %f1,%f0
LCDBR F0, F1
BR L9
L36:
FMOVD 304(R9), F3
@ -436,7 +436,7 @@ L30:
L20:
FMOVD 88(R9), F0
WFMADB V7, V2, V0, V2
WORD $0xB3130022 //lcdbr %f2,%f2
LCDBR F2, F2
FMOVD F2, ret+8(FP)
RET
L13:

2
src/math/exp_s390x.s
View File

@ -116,7 +116,7 @@ L16:
FMOVD F0, ret+8(FP)
RET
L20:
WORD $0xB3130020 //lcdbr %f2,%f0
LCDBR F0, F2
BR L2
L6:
MOVD $·expxaddexp<>+0(SB), R1

10
src/math/expm1_s390x.s
View File

@ -100,14 +100,14 @@ L2:
FMOVD 16(R5), F6
WFMADB V0, V2, V6, V2
RISBGZ $57, $60, $3, R1, R3
WORD $0xB3130022 //lcdbr %f2,%f2
LCDBR F2, F2
MOVD $·expm1tab<>+0(SB), R2
WORD $0x68432000 //ld %f4,0(%r3,%r2)
FMADD F4, F0, F0
SLD $48, R1, R2
WFMSDB V2, V0, V4, V0
LDGR R2, F4
WORD $0xB3130000 //lcdbr %f0,%f0
LCDBR F0, F0
FSUB F4, F6
WFMSDB V0, V4, V6, V0
FMOVD F0, ret+8(FP)
@ -126,7 +126,7 @@ L16:
FMOVD F0, ret+8(FP)
RET
L20:
WORD $0xB3130020 //lcdbr %f2,%f0
LCDBR F0, F2
BR L2
L6:
MOVD $·expm1xaddexp<>+0(SB), R1
@ -154,13 +154,13 @@ L6:
FMOVD 16(R5), F6
FMADD F4, F1, F6
LGDR F5, R1
WORD $0xB3130066 //lcdbr %f6,%f6
LCDBR F6, F6
RISBGZ $57, $60, $3, R1, R3
WORD $0x68432000 //ld %f4,0(%r3,%r2)
FMADD F4, F1, F1
MOVD $0x4086000000000000, R2
FMSUB F1, F6, F4
WORD $0xB3130044 //lcdbr %f4,%f4
LCDBR F4, F4
WFCHDBS V2, V0, V0
BEQ L21
ADDW $0xF000, R1

4
src/math/log1p_s390x.s
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@ -114,7 +114,7 @@ TEXT ·log1pAsm(SB), NOSPLIT, $0-16
MOVD $·log1pxzero<>+0(SB), R1
FMOVD 0(R1), F2
BVS LEXITTAGlog1p
WORD $0xB3130044 // lcdbr %f4,%f4
LCDBR F4, F4
WFCEDBS V2, V4, V6
BEQ L9
WFCHDBS V4, V2, V2
@ -129,7 +129,7 @@ L8:
FSUB F4, F3
FMADD F2, F4, F1
MOVD $·log1pc4<>+0(SB), R2
WORD $0xB3130041 // lcdbr %f4,%f1
LCDBR F1, F4
FMOVD 0(R2), F7
FSUB F3, F0
MOVD $·log1pc3<>+0(SB), R2

2
src/math/log_s390x.s
View File

@ -142,7 +142,7 @@ L2:
BYTE $0x10
BYTE $0x1F
MOVD ·logxl2<>+0(SB), R1
WORD $0xB3130001 //lcdbr %f0,%f1
LCDBR F1, F0
LDGR R1, F4
WFMADB V0, V4, V2, V0
L1:

6
src/math/pow_s390x.s
View File

@ -492,10 +492,10 @@ L9:
FMOVD F2, F1
BR L1
L46:
WORD $0xB3130040 //lcdbr %f4,%f0
LCDBR F0, F4
BR L3
L44:
WORD $0xB3130030 //lcdbr %f3,%f0
LCDBR F0, F3
BR L7
L35:
FMOVD F0, F1
@ -590,7 +590,7 @@ L32:
FMOVD 8(R9), F4
BR L17
L50:
WORD $0xB3130042 //lcdbr %f4,%f2
LCDBR F2, F4
BR L14
xIsOne: // Pow(1, y) = 1 for any y
yIsOne: // Pow(x, 1) = x for any x

4
src/math/tan_s390x.s
View File

@ -87,7 +87,7 @@ L2:
WFDDB V0, V1, V0
WFMDB V2, V16, V2
WFMADB V2, V0, V4, V0
WORD $0xB3130000 //lcdbr %f0,%f0
LCDBR F0, F0
FMOVD F0, ret+8(FP)
RET
L12:
@ -102,7 +102,7 @@ L11:
FMOVD F0, ret+8(FP)
RET
L10:
WORD $0xB3130020 //lcdbr %f2,%f0
LCDBR F0, F2
BR L2
L9:
BR ·tan(SB)