From 8b408972ff5476f1e23ad24a329f89442e6df054 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Thu, 26 May 2016 19:56:48 -0700 Subject: [PATCH] mesa: Pass gl_constant_value union into _mesa_fetch_state(). We've had some trouble in the past with copying integers around via float pointers, as the C compiler sometimes uses x87 floating point registers to load values on 32-bit systems. Passing the gl_constant_value union should be safer. To avoid churn, this patch creates a "GLfloat *value" variable so existing uses can stay the same. Not observed to fix anything, but I was in the area adding more integer state vars, and thought it'd be wise. Signed-off-by: Kenneth Graunke Reviewed-by: Dave Airlie Cc: mesa-stable@lists.freedesktop.org --- src/mesa/program/prog_statevars.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/src/mesa/program/prog_statevars.c b/src/mesa/program/prog_statevars.c index 03ece67..27ff333 100644 --- a/src/mesa/program/prog_statevars.c +++ b/src/mesa/program/prog_statevars.c @@ -55,8 +55,10 @@ */ static void _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[], - GLfloat *value) + gl_constant_value *val) { + GLfloat *value = &val->f; + switch (state[0]) { case STATE_MATERIAL: { @@ -353,7 +355,7 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[], } return; case STATE_NUM_SAMPLES: - ((int *)value)[0] = MAX2(1, _mesa_geometric_samples(ctx->DrawBuffer)); + val[0].i = MAX2(1, _mesa_geometric_samples(ctx->DrawBuffer)); return; case STATE_DEPTH_RANGE: value[0] = ctx->ViewportArray[0].Near; /* near */ @@ -1071,7 +1073,7 @@ _mesa_load_state_parameters(struct gl_context *ctx, if (paramList->Parameters[i].Type == PROGRAM_STATE_VAR) { _mesa_fetch_state(ctx, paramList->Parameters[i].StateIndexes, - ¶mList->ParameterValues[i][0].f); + ¶mList->ParameterValues[i][0]); } } } -- 2.7.4