diff options
| author | Shenghou Ma <minux.ma@gmail.com> | 2012-02-06 12:49:28 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2012-02-06 12:49:28 -0500 |
| commit | 6392b43a1583f5ccf5a3f7c38f096e8dd5403b0d (patch) | |
| tree | 116dc7e93816784cede5c51eed074f59fc7a88e8 /src | |
| parent | 7ac03695f861fcb46df3d06d53230b89c7811859 (diff) | |
| download | go-6392b43a1583f5ccf5a3f7c38f096e8dd5403b0d.tar.xz | |
8a, 8l: implement support for RDTSC instruction.
Also modify runtime/asm_386.s to use it.
R=rsc
CC=golang-dev
https://golang.org/cl/5634043
Diffstat (limited to 'src')
| -rw-r--r-- | src/cmd/8a/lex.c | 1 | ||||
| -rw-r--r-- | src/cmd/8l/8.out.h | 4 | ||||
| -rw-r--r-- | src/cmd/8l/optab.c | 2 | ||||
| -rw-r--r-- | src/pkg/runtime/asm_386.s | 2 |
4 files changed, 7 insertions, 2 deletions
diff --git a/src/cmd/8a/lex.c b/src/cmd/8a/lex.c index 403669404e..254deab6a4 100644 --- a/src/cmd/8a/lex.c +++ b/src/cmd/8a/lex.c @@ -445,6 +445,7 @@ struct "RCRB", LTYPE3, ARCRB, "RCRL", LTYPE3, ARCRL, "RCRW", LTYPE3, ARCRW, + "RDTSC", LTYPE0, ARDTSC, "REP", LTYPE0, AREP, "REPN", LTYPE0, AREPN, "RET", LTYPE0, ARET, diff --git a/src/cmd/8l/8.out.h b/src/cmd/8l/8.out.h index 5e4b73ad09..e8f530664b 100644 --- a/src/cmd/8l/8.out.h +++ b/src/cmd/8l/8.out.h @@ -395,7 +395,9 @@ enum as ACMPXCHGL, ACMPXCHGW, ACMPXCHG8B, - + + ARDTSC, + AXADDB, AXADDL, AXADDW, diff --git a/src/cmd/8l/optab.c b/src/cmd/8l/optab.c index 69602d704a..c7700aa792 100644 --- a/src/cmd/8l/optab.c +++ b/src/cmd/8l/optab.c @@ -707,6 +707,8 @@ Optab optab[] = { ACMPXCHGW, yrl_ml, Pm, 0xb1 }, { ACMPXCHG8B, yscond, Pm, 0xc7,(01) }, + { ARDTSC, ynone, Pm, 0x31 }, + { AXADDB, yrb_mb, Pb, 0x0f,0xc0 }, { AXADDL, yrl_ml, Pm, 0xc1 }, { AXADDW, yrl_ml, Pe, 0x0f,0xc1 }, diff --git a/src/pkg/runtime/asm_386.s b/src/pkg/runtime/asm_386.s index c242af8296..a4f94601dc 100644 --- a/src/pkg/runtime/asm_386.s +++ b/src/pkg/runtime/asm_386.s @@ -527,7 +527,7 @@ TEXT runtime·getcallersp(SB), 7, $0 // int64 runtime·cputicks(void), so really // void runtime·cputicks(int64 *ticks) TEXT runtime·cputicks(SB),7,$0 - BYTE $0x0F; BYTE $0x31; // RDTSC; not supported by 8a + RDTSC MOVL ret+0(FP), DI MOVL AX, 0(DI) MOVL DX, 4(DI) |