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ac/llvm: add AC_WAIT_EXP for ac_build_waitcnt

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Reviewed-by: Mihai Preda <mhpreda@gmail.com>
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15966>
This commit is contained in:
Marek Olšák
2022-03-22 09:02:14 -04:00
committed by Marge Bot
parent f719085007
commit a3e777a89a
2 changed files with 6 additions and 2 deletions
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7
src/amd/llvm/ac_llvm_build.c
View File

@@ -2461,10 +2461,13 @@ void ac_build_waitcnt(struct ac_llvm_context *ctx, unsigned wait_flags)
if (!wait_flags)
return;
unsigned expcnt = 7;
unsigned lgkmcnt = 63;
unsigned vmcnt = ctx->chip_class >= GFX9 ? 63 : 15;
unsigned vscnt = 63;
if (wait_flags & AC_WAIT_EXP)
expcnt = 0;
if (wait_flags & AC_WAIT_LGKM)
lgkmcnt = 0;
if (wait_flags & AC_WAIT_VLOAD)
@@ -2480,12 +2483,12 @@ void ac_build_waitcnt(struct ac_llvm_context *ctx, unsigned wait_flags)
/* There is no intrinsic for vscnt(0), so use a fence. */
if ((wait_flags & AC_WAIT_LGKM && wait_flags & AC_WAIT_VLOAD && wait_flags & AC_WAIT_VSTORE) ||
vscnt == 0) {
assert(!(wait_flags & AC_WAIT_EXP));
LLVMBuildFence(ctx->builder, LLVMAtomicOrderingRelease, false, "");
return;
}
unsigned simm16 = (lgkmcnt << 8) | (7 << 4) | /* expcnt */
(vmcnt & 0xf) | ((vmcnt >> 4) << 14);
unsigned simm16 = (lgkmcnt << 8) | (expcnt << 4) | (vmcnt & 0xf) | ((vmcnt >> 4) << 14);
LLVMValueRef args[1] = {
LLVMConstInt(ctx->i32, simm16, false),

1
src/amd/llvm/ac_llvm_build.h
View File

@@ -52,6 +52,7 @@ enum
#define AC_WAIT_LGKM (1 << 0) /* LDS, GDS, constant, message */
#define AC_WAIT_VLOAD (1 << 1) /* VMEM load/sample instructions */
#define AC_WAIT_VSTORE (1 << 2) /* VMEM store instructions */
#define AC_WAIT_EXP (1 << 3) /* EXP instructions */
struct ac_llvm_flow;
struct ac_llvm_compiler;