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vec4 implementation of auto-increment/decrement.

This commit is contained in:
Stephen Williams 2014-01-28 16:24:26 -08:00
parent 11197baf86
commit 75233a9bca
1 changed files with 61 additions and 0 deletions
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61
tgt-vvp/eval_vec4.c
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@ -648,6 +648,51 @@ static void draw_ternary_vec4(ivl_expr_t expr, int stuff_ok_flag)
clr_flag(use_flag);
}
static void draw_unary_inc_dec(ivl_expr_t sub, bool incr, bool pre)
{
ivl_signal_t sig = 0;
unsigned wid = 0;
switch (ivl_expr_type(sub)) {
case IVL_EX_SELECT: {
ivl_expr_t e1 = ivl_expr_oper1(sub);
sig = ivl_expr_signal(e1);
wid = ivl_expr_width(e1);
break;
}
case IVL_EX_SIGNAL:
sig = ivl_expr_signal(sub);
wid = ivl_expr_width(sub);
break;
default:
assert(0);
break;
}
draw_eval_vec4(sub, STUFF_OK_XZ);
const char*cmd = incr? "%add" : "%sub";
if (pre) {
/* prefix means we add the result first, and store the
result, as well as leaving a copy on the stack. */
fprintf(vvp_out, " %%pushi/vec4 1, 0, %u;\n", wid);
fprintf(vvp_out, " %s;\n", cmd);
fprintf(vvp_out, " %%dup/vec4;\n");
fprintf(vvp_out, " %%store/vec4 v%p_0, 0, %u;\n", sig, wid);
} else {
/* The post-fix decrement returns the non-decremented
version, so there is a slight re-arrange. */
fprintf(vvp_out, " %%dup/vec4;\n");
fprintf(vvp_out, " %%pushi/vec4 1, 0, %u;\n", wid);
fprintf(vvp_out, " %s;\n", cmd);
fprintf(vvp_out, " %%store/vec4 v%p_0, 0, %u;\n", sig, wid);
}
}
static void draw_unary_vec4(ivl_expr_t expr, int stuff_ok_flag)
{
ivl_expr_t sub = ivl_expr_oper1(expr);
@ -690,6 +735,22 @@ static void draw_unary_vec4(ivl_expr_t expr, int stuff_ok_flag)
fprintf(vvp_out, " %%nand/r;\n");
break;
case 'D': /* pre-decrement (--x) */
draw_unary_inc_dec(sub, false, true);
break;
case 'd': /* post_decrement (x--) */
draw_unary_inc_dec(sub, false, false);
break;
case 'I': /* pre-increment (++x) */
draw_unary_inc_dec(sub, true, true);
break;
case 'i': /* post-increment (x++) */
draw_unary_inc_dec(sub, true, false);
break;
case 'N': /* nor (~|) */
draw_eval_vec4(sub, stuff_ok_flag);
fprintf(vvp_out, " %%nor/r;\n");